CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>High Energy Transient Explorer 1 - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-sticky-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"7b9caf85-1a29-4269-98d7-700a0a8e2e87","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"High_Energy_Transient_Explorer_1","wgTitle":"High Energy Transient Explorer 1","wgCurRevisionId":1147593651,"wgRevisionId":1147593651,"wgArticleId":333472,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Source attribution","Articles with short description","Short description is different from Wikidata","Use American English from December 2021","All Wikipedia articles written in American English","Use dmy dates from December 2021","Gamma-ray telescopes","X-ray telescopes","Space telescopes","Satellites orbiting Earth","Spacecraft launched in 1996","Spacecraft launched in 2000","Spacecraft launched by Pegasus rockets","Explorers Program"], "wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"High_Energy_Transient_Explorer_1","wgRelevantArticleId":333472,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgRedirectedFrom":"High_Energy_Transient_Explorer","wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":9000,"wgInternalRedirectTargetUrl":"/wiki/High_Energy_Transient_Explorer_1","wgRelatedArticlesCompat":[],"wgCentralAuthMobileDomain":false,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition": "interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q967483","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=[ "mediawiki.action.view.redirect","ext.cite.ux-enhancements","mediawiki.page.media","site","mediawiki.page.ready","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession","wikibase.sidebar.tracking"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.4"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="High Energy Transient Explorer 1 - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/High_Energy_Transient_Explorer_1"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/High_Energy_Transient_Explorer_1"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="//login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-High_Energy_Transient_Explorer_1 rootpage-High_Energy_Transient_Explorer_1 skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=High+Energy+Transient+Explorer+1" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=High+Energy+Transient+Explorer+1" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=High+Energy+Transient+Explorer+1" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=High+Energy+Transient+Explorer+1" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mission" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Mission"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Mission</span> </div> </a> <ul id="toc-Mission-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Spacecraft" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Spacecraft"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Spacecraft</span> </div> </a> <ul id="toc-Spacecraft-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Experiments" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Experiments"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Experiments</span> </div> </a> <button aria-controls="toc-Experiments-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Experiments subsection</span> </button> <ul id="toc-Experiments-sublist" class="vector-toc-list"> <li id="toc-Omnidirectional_Gamma-Ray_Spectrometer" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Omnidirectional_Gamma-Ray_Spectrometer"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Omnidirectional Gamma-Ray Spectrometer</span> </div> </a> <ul id="toc-Omnidirectional_Gamma-Ray_Spectrometer-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ultraviolet_Transient_Camera_Array" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Ultraviolet_Transient_Camera_Array"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Ultraviolet Transient Camera Array</span> </div> </a> <ul id="toc-Ultraviolet_Transient_Camera_Array-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Wide_Field_X-ray_Monitor" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Wide_Field_X-ray_Monitor"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Wide Field X-ray Monitor</span> </div> </a> <ul id="toc-Wide_Field_X-ray_Monitor-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Launch" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Launch"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Launch</span> </div> </a> <ul id="toc-Launch-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Atmospheric_entry" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Atmospheric_entry"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Atmospheric entry</span> </div> </a> <ul id="toc-Atmospheric_entry-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">High Energy Transient Explorer 1</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 16 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-16" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">16 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%87%D9%8A%D8%AA_(%D9%82%D9%85%D8%B1_%D8%A7%D8%B5%D8%B7%D9%86%D8%A7%D8%B9%D9%8A)" title="هيت (قمر اصطناعي) – Arabic" lang="ar" hreflang="ar" data-title="هيت (قمر اصطناعي)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Czech" lang="cs" hreflang="cs" data-title="High Energy Transient Explorer" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – German" lang="de" hreflang="de" data-title="High Energy Transient Explorer" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Spanish" lang="es" hreflang="es" data-title="High Energy Transient Explorer" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%A9%D8%A7%D9%88%D8%B4%DA%AF%D8%B1_%DA%86%D8%B4%D9%85%D9%87%E2%80%8C%D9%87%D8%A7%DB%8C_%D9%BE%D8%B1%D8%A7%D9%86%D8%B1%DA%98%DB%8C_%DA%AF%D8%B0%D8%A7%D8%B1" title="کاوشگر چشمه‌های پرانرژی گذار – Persian" lang="fa" hreflang="fa" data-title="کاوشگر چشمه‌های پرانرژی گذار" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – French" lang="fr" hreflang="fr" data-title="High Energy Transient Explorer" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/High_Energy_Transient_Explorer_1" title="High Energy Transient Explorer 1 – Galician" lang="gl" hreflang="gl" data-title="High Energy Transient Explorer 1" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Indonesian" lang="id" hreflang="id" data-title="High Energy Transient Explorer" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Italian" lang="it" hreflang="it" data-title="High Energy Transient Explorer" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Kazakh" lang="kk" hreflang="kk" data-title="High Energy Transient Explorer" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/HETE_(m%C5%B1hold)" title="HETE (műhold) – Hungarian" lang="hu" hreflang="hu" data-title="HETE (műhold)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/HETE" title="HETE – Japanese" lang="ja" hreflang="ja" data-title="HETE" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/HETE-2" title="HETE-2 – Polish" lang="pl" hreflang="pl" data-title="HETE-2" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Portuguese" lang="pt" hreflang="pt" data-title="High Energy Transient Explorer" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/High_Energy_Transient_Explorer" title="High Energy Transient Explorer – Slovak" lang="sk" hreflang="sk" data-title="High Energy Transient Explorer" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/HETE_(satelliitti)" title="HETE (satelliitti) – Finnish" lang="fi" hreflang="fi" data-title="HETE (satelliitti)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q967483#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/High_Energy_Transient_Explorer_1" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:High_Energy_Transient_Explorer_1" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/High_Energy_Transient_Explorer_1"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/High_Energy_Transient_Explorer_1"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/High_Energy_Transient_Explorer_1" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/High_Energy_Transient_Explorer_1" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&oldid=1147593651" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=High_Energy_Transient_Explorer_1&id=1147593651&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHigh_Energy_Transient_Explorer_1"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FHigh_Energy_Transient_Explorer_1"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=High_Energy_Transient_Explorer_1&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:HETE" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q967483" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=High_Energy_Transient_Explorer&redirect=no" class="mw-redirect" title="High Energy Transient Explorer">High Energy Transient Explorer</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">NASA satellite of the Explorer program</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><style data-mw-deduplicate="TemplateStyles:r1089065853">.mw-parser-output .ib-spaceflight{width:25em}.mw-parser-output .ib-spaceflight .infobox-header{background:#ddf}.mw-parser-output .ib-edit-wd{float:right}</style><table class="infobox ib-spaceflight"><caption class="infobox-title">High Energy Transient Explorer 1</caption><tbody><tr><th scope="row" class="infobox-label">Names</th><td class="infobox-data">HETE-1</td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label">Mission type</th><td class="infobox-data"><a href="/wiki/High-energy_astronomy" title="High-energy astronomy">High-energy astronomy</a></td></tr><tr><th scope="row" class="infobox-label">Operator</th><td class="infobox-data"><a href="/wiki/NASA" title="NASA">NASA</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/International_Designator" title="International Designator">COSPAR ID</a></th><td class="infobox-data">1996-061A</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Satellite_Catalog_Number" title="Satellite Catalog Number">SATCAT <abbr title="number">no.</abbr></a></th><td class="infobox-data">24645</td></tr><tr><th scope="row" class="infobox-label">Mission duration</th><td class="infobox-data">18 months (planned)<br /><a href="/w/index.php?title=Failed_on_orbit&action=edit&redlink=1" class="new" title="Failed on orbit (page does not exist)">Failed on orbit</a></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th colspan="2" class="infobox-header">Spacecraft properties</th></tr><tr><th scope="row" class="infobox-label">Spacecraft</th><td class="infobox-data">Explorer</td></tr><tr><th scope="row" class="infobox-label">Spacecraft type</th><td class="infobox-data">High Energy Transient Explorer</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Satellite_bus" title="Satellite bus">Bus</a></th><td class="infobox-data">HETE</td></tr><tr><th scope="row" class="infobox-label">Manufacturer</th><td class="infobox-data">AeroAstro, Inc.</td></tr><tr><th scope="row" class="infobox-label">Launch mass</th><td class="infobox-data">128 kg (282 lb)</td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th colspan="2" class="infobox-header">Start of mission</th></tr><tr><th scope="row" class="infobox-label">Launch date</th><td class="infobox-data">4 November 1996, 17:08:56 <a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">UTC</a></td></tr><tr><th scope="row" class="infobox-label">Rocket</th><td class="infobox-data"><a href="/wiki/Pegasus_(rocket)" class="mw-redirect" title="Pegasus (rocket)">Pegasus-XL</a> (F14)</td></tr><tr><th scope="row" class="infobox-label">Launch site</th><td class="infobox-data"><a href="/wiki/Wallops_Flight_Facility" title="Wallops Flight Facility">Wallops Flight Facility</a>, <a href="/wiki/Wallops_Flight_Facility_Launch_Area_3" title="Wallops Flight Facility Launch Area 3">LA-3</a></td></tr><tr><th scope="row" class="infobox-label">Contractor</th><td class="infobox-data"><a href="/wiki/Orbital_Sciences_Corporation" title="Orbital Sciences Corporation">Orbital Sciences Corporation</a></td></tr><tr><th scope="row" class="infobox-label">Entered service</th><td class="infobox-data"><a href="/w/index.php?title=Failed_on_orbit&action=edit&redlink=1" class="new" title="Failed on orbit (page does not exist)">Failed on orbit</a></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th colspan="2" class="infobox-header">End of mission</th></tr><tr><th scope="row" class="infobox-label">Decay date</th><td class="infobox-data">7 April 2002</td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th colspan="2" class="infobox-header">Orbital parameters</th></tr><tr><th scope="row" class="infobox-label">Reference system</th><td class="infobox-data"><a href="/wiki/Geocentric_orbit" title="Geocentric orbit">Geocentric orbit</a><sup id="cite_ref-Trajectory_1-0" class="reference"><a href="#cite_note-Trajectory-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Regime</th><td class="infobox-data"><a href="/wiki/Low_Earth_orbit" title="Low Earth orbit">Low Earth orbit</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Apsis" title="Apsis">Perigee altitude</a></th><td class="infobox-data">487 km (303 mi)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Apsis" title="Apsis">Apogee altitude</a></th><td class="infobox-data">555 km (345 mi)</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Orbital_inclination" title="Orbital inclination">Inclination</a></th><td class="infobox-data">38.00°</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Orbital_period" title="Orbital period">Period</a></th><td class="infobox-data">95.00 minutes</td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th colspan="2" class="infobox-header">Instruments</th></tr><tr><td colspan="2" class="infobox-full-data">Omnidirectional Gamma-Ray Spectrometer<br />Ultraviolet Transient Camera Array<br />Wide Field X-ray Monitor</td></tr><tr><td colspan="2" class="infobox-below"><div class="" style="width:100%; text-align:center; border-top:1px #aaa solid"><b>Explorer program</b></div><div style="width:100%"><div style="float: left; text-align:left;padding-right:0.5em;" class="noprint">← <a href="/wiki/Fast_Auroral_SnapshoT_Explorer" title="Fast Auroral SnapshoT Explorer">FAST</a> (Explorer 70)</div><div style="float: right; text-align:right;padding-left:0.5em;" class="noprint"><a href="/wiki/Advanced_Composition_Explorer" title="Advanced Composition Explorer">ACE</a> (Explorer 71) →</div></div><div style="clear:both;" class=""></div></td></tr></tbody></table> <p><b>High Energy Transient Explorer 1</b> (<b>HETE-1</b>) was a <a href="/wiki/NASA" title="NASA">NASA</a> astronomical satellite with international participation (mainly <a href="/wiki/Japan" title="Japan">Japan</a> and <a href="/wiki/France" title="France">France</a>). </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The concept of a satellite capable of multi-wavelength observations of <a href="/wiki/Gamma-ray_burst" title="Gamma-ray burst">gamma-ray bursts</a> (GRB) was discussed at the <a href="/wiki/Santa_Cruz,_California" title="Santa Cruz, California">Santa Cruz, California</a> meeting on GRBs in 1981. In 1986, the first realistic implementation of the HETE concept by a <a href="/wiki/Massachusetts_Institute_of_Technology" title="Massachusetts Institute of Technology">Massachusetts Institute of Technology</a> MIT-led International Team was proposed. This concept, which was adopted, emphasized accurate locations and multi-wavelength coverage as the primary scientific goals for a sharply-focused small satellite mission which would ultimately solve the gamma-ray burst mystery. </p><p>In 1989, NASA approved funding for a low-cost "University Class" explorer satellite to search for GRBs. In 1992, the HETE-1 program was funded, and the design and construction of HETE-1 began. The original spacecraft contractor for HETE-1 was AeroAstro, Inc., of <a href="/wiki/Herndon,_Virginia" title="Herndon, Virginia">Herndon, Virginia</a>. AeroAstro was responsible for the spacecraft bus, including power, communications, attitude control, and computers. </p><p>The instrument complement for HETE-1 consisted of four wide-field <a href="/wiki/Gamma_spectroscopy" title="Gamma spectroscopy">gamma-ray detectors</a>, supplied by the CESR of <a href="/wiki/Toulouse" title="Toulouse">Toulouse</a>, <a href="/wiki/France" title="France">France</a>. A wide-field coded-aperture X-ray imager, supplied by a collaboration of <a href="/wiki/Los_Alamos_National_Laboratory" title="Los Alamos National Laboratory">Los Alamos National Laboratory</a> (LANL) and the Institute of Chemistry and Physics (<a href="/wiki/Riken" title="Riken">RIKEN</a>) of <a href="/wiki/Tokyo" title="Tokyo">Tokyo</a>, <a href="/wiki/Japan" title="Japan">Japan</a>. Four wide-field near-UV CCD cameras, supplied by the <a href="/wiki/Massachusetts_Institute_of_Technology_School_of_Science" title="Massachusetts Institute of Technology School of Science">Center for Space Research</a> at the Massachusetts Institute of Technology. </p><p>Due to the tragic fate of HETE-1 and the continuing timeliness of GRB science, NASA agreed to a reflight of the HETE-1 satellite, using flight spare hardware from the first satellite. In July 1997, funding for a second HETE satellite was granted, with a target launch date early 2000.<sup id="cite_ref-MIT_2-0" class="reference"><a href="#cite_note-MIT-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mission">Mission</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=2" title="Edit section: Mission"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The prime objective of HETE-1 was to carry out the first multi-wavelength study of GRBs with <a href="/wiki/Ultraviolet" title="Ultraviolet">ultraviolet</a> (UV), <a href="/wiki/X-ray" title="X-ray">X-ray</a>, and <a href="/wiki/Gamma-ray" class="mw-redirect" title="Gamma-ray">gamma-ray</a> instruments mounted on a single, compact spacecraft. A unique feature of the HETE-1 mission was its capability to localize GRBs with ~10 <a href="/wiki/Minute_and_second_of_arc" title="Minute and second of arc">arcseconds</a> accuracy in near real time aboard the spacecraft, and to transmit these positions directly to a network of receivers at existing ground-based observatories enabling rapid, sensitive follow-up studies in the <a href="/wiki/Radio" title="Radio">radio</a>, <a href="/wiki/Infrared" title="Infrared">infrared</a> (IR), and <a href="/wiki/Light" title="Light">visible light</a> bands.<sup id="cite_ref-Display_3-0" class="reference"><a href="#cite_note-Display-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Spacecraft">Spacecraft</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=3" title="Edit section: Spacecraft"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The satellite bus for the <b>HETE-1</b> satellite was designed and built by AeroAstro, Inc. (USA) of <a href="/wiki/Herndon,_Virginia" title="Herndon, Virginia">Herndon, Virginia</a>. The HETE-1 spacecraft was Sun-pointing with four <a href="/wiki/Solar_panels_on_spacecraft" title="Solar panels on spacecraft">solar panels</a> connected to the bottom of the spacecraft bus. Spacecraft attitude was to be controlled by magnetic torque coils and a momentum wheel.<sup id="cite_ref-Display_3-1" class="reference"><a href="#cite_note-Display-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Experiments">Experiments</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=4" title="Edit section: Experiments"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Omnidirectional_Gamma-Ray_Spectrometer">Omnidirectional Gamma-Ray Spectrometer</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=5" title="Edit section: Omnidirectional Gamma-Ray Spectrometer"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Omnidirectional Gamma-Ray Spectrometer was designed to operate from 6 <a href="/wiki/Electronvolt" title="Electronvolt">keV</a> to greater than 1 MeV. The instrument consisted of four wide-field gamma-ray detectors with a total effective area of 120 cm<sup>2</sup> (19 sq in). The HETE satellite remained within the launch vehicle due to battery failure. The experiment was unable to operate.<sup id="cite_ref-Experiment1_4-0" class="reference"><a href="#cite_note-Experiment1-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Ultraviolet_Transient_Camera_Array">Ultraviolet Transient Camera Array</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=6" title="Edit section: Ultraviolet Transient Camera Array"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Ultraviolet Transient Camera Array was designed to provide accurate directional information on transient events, and to assist with spacecraft attitude determination. The instrument consisted of four ultraviolet <a href="/wiki/Charge-coupled_device" title="Charge-coupled device">Charge-coupled device</a> (CCD) cameras operating in the 5 to 7 eV range.<sup id="cite_ref-Experiment3_5-0" class="reference"><a href="#cite_note-Experiment3-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Wide_Field_X-ray_Monitor">Wide Field X-ray Monitor</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=7" title="Edit section: Wide Field X-ray Monitor"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Widefield X-ray Monitor was designed to perform X-ray studies of gamma-ray bursts. The instrument consisted of coded aperture cameras, sensitive in the 2-25 keV energy range, and with location accuracy to ~ 10 arcminutes or better.<sup id="cite_ref-Experiment2_6-0" class="reference"><a href="#cite_note-Experiment2-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Launch">Launch</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=8" title="Edit section: Launch"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:SAC-B_flight_small.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/6/67/SAC-B_flight_small.gif" decoding="async" width="159" height="95" class="mw-file-element" data-file-width="159" data-file-height="95" /></a><figcaption>Pegasus XL launch vehicle carrying the SAC-B and HETE-1 satellites.</figcaption></figure> <p>The HETE-1 satellite was launched with the <a href="/wiki/Argentina" title="Argentina">Argentina</a> satellite SAC-B. HETE-1 was lost during the launch on 4 November 1996, at 17:08:56 <a href="/wiki/Coordinated_Universal_Time" title="Coordinated Universal Time">UTC</a>, from <a href="/wiki/Wallops_Flight_Facility" title="Wallops Flight Facility">Wallops Flight Facility</a> (WFF), <a href="/wiki/Wallops_Flight_Facility_Launch_Area_3" title="Wallops Flight Facility Launch Area 3">launch area-3</a>. The <a href="/wiki/Northrop_Grumman_Pegasus" title="Northrop Grumman Pegasus">Pegasus XL</a> <a href="/wiki/Launch_vehicle" title="Launch vehicle">launch vehicle</a> achieved a good orbit, but <a href="/wiki/Pyrotechnic_fastener" title="Pyrotechnic fastener">explosive bolts</a> releasing HETE-1 from another satellite, SAC-B, and from its Dual Payload Attach Fitting (DPAF) envelope failed to charge, dooming both satellites. A battery on the third stage of the launch vehicle and responsible for these bolts cracked during the ascent. Due to its inability to deploy the solar panels, HETE lost power several days after launch.<sup id="cite_ref-Display_3-2" class="reference"><a href="#cite_note-Display-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Atmospheric_entry">Atmospheric entry</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=9" title="Edit section: Atmospheric entry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>HETE-1 re-entered on 7 April 2002. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=10" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239009302">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{clear:left;float:left;margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 1em}}</style><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/RocketSunIcon.svg/28px-RocketSunIcon.svg.png" decoding="async" width="28" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/RocketSunIcon.svg/42px-RocketSunIcon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d6/RocketSunIcon.svg/56px-RocketSunIcon.svg.png 2x" data-file-width="128" data-file-height="128" /></span></span></span><span class="portalbox-link"><a href="/wiki/Portal:Spaceflight" title="Portal:Spaceflight">Spaceflight portal</a></span></li></ul> <p><a href="/wiki/Explorer_program" class="mw-redirect" title="Explorer program">Explorer program</a> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=High_Energy_Transient_Explorer_1&action=edit&section=11" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-Trajectory-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-Trajectory_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1996-061A">"Trajectory: HETE-1 (1996-061A)"</a>. NASA. 28 October 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Trajectory%3A+HETE-1+%281996-061A%29&rft.pub=NASA&rft.date=2021-10-28&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fspacecraft%2FdisplayTrajectory.action%3Fid%3D1996-061A&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span> <span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates text from this source, which is in the <a href="/wiki/Public_domain" title="Public domain">public domain</a>.</span> </li> <li id="cite_note-MIT-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-MIT_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://space.mit.edu/HETE/history.html">"The History of the HETE-2 Mission"</a>. MIT<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+History+of+the+HETE-2+Mission&rft.pub=MIT&rft_id=https%3A%2F%2Fspace.mit.edu%2FHETE%2Fhistory.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span></span> </li> <li id="cite_note-Display-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Display_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Display_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Display_3-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1996-061A">"Display: HETE-1 (1996-061A)"</a>. NASA. 28 October 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Display%3A+HETE-1+%281996-061A%29&rft.pub=NASA&rft.date=2021-10-28&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fspacecraft%2Fdisplay.action%3Fid%3D1996-061A&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span> <span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates text from this source, which is in the <a href="/wiki/Public_domain" title="Public domain">public domain</a>.</span> </li> <li id="cite_note-Experiment1-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-Experiment1_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1996-061A-01">"Experiment: Omnidirectional Gamma-Ray Spectrometer"</a>. NASA. 28 October 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Experiment%3A+Omnidirectional+Gamma-Ray+Spectrometer&rft.pub=NASA&rft.date=2021-10-28&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fexperiment%2Fdisplay.action%3Fid%3D1996-061A-01&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span> <span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates text from this source, which is in the <a href="/wiki/Public_domain" title="Public domain">public domain</a>.</span> </li> <li id="cite_note-Experiment3-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-Experiment3_5-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1996-061A-03">"Experiment: Ultraviolet Transient Camera Array"</a>. NASA. 28 October 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Experiment%3A+Ultraviolet+Transient+Camera+Array&rft.pub=NASA&rft.date=2021-10-28&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fexperiment%2Fdisplay.action%3Fid%3D1996-061A-03&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span> <span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates text from this source, which is in the <a href="/wiki/Public_domain" title="Public domain">public domain</a>.</span> </li> <li id="cite_note-Experiment2-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-Experiment2_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1996-061A-02">"Experiment: Wide Field X-ray Monitor"</a>. NASA. 28 October 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">1 December</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Experiment%3A+Wide+Field+X-ray+Monitor&rft.pub=NASA&rft.date=2021-10-28&rft_id=https%3A%2F%2Fnssdc.gsfc.nasa.gov%2Fnmc%2Fexperiment%2Fdisplay.action%3Fid%3D1996-061A-02&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHigh+Energy+Transient+Explorer+1" class="Z3988"></span> <span class="noviewer" typeof="mw:File"><span><img alt="Public Domain" src="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/12px-PD-icon.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/18px-PD-icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/62/PD-icon.svg/24px-PD-icon.svg.png 2x" data-file-width="196" data-file-height="196" /></span></span> This article incorporates text from this source, which is in the <a href="/wiki/Public_domain" title="Public domain">public domain</a>.</span> </li> </ol></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Space_telescopes" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Space_observatories" title="Template:Space observatories"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Space_observatories" title="Template talk:Space observatories"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Space_observatories" title="Special:EditPage/Template:Space observatories"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Space_telescopes" style="font-size:114%;margin:0 4em"><a href="/wiki/Space_telescope" title="Space telescope">Space telescopes</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Operating</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Radio_astronomy" title="Radio astronomy">Radio and Microwave</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chang%27e_4#Science_payloads" title="Chang'e 4">NCLE</a> <span style="font-size:85%;">(since 2018)</span></li> <li><a href="/wiki/Solar_Orbiter" title="Solar Orbiter">Solar Orbiter</a> <span style="font-size:85%;">(since 2020)</span></li> <li><a href="/wiki/STEREO" title="STEREO">STEREO</a> <span style="font-size:85%;">(since 2006)</span></li> <li><a href="/wiki/Queqiao_relay_satellite" class="mw-redirect" title="Queqiao relay satellite">Queqiao</a> <span style="font-size:85%;">(since 2018)</span></li> <li><a href="/wiki/Wind_(spacecraft)" title="Wind (spacecraft)">Wind</a> <span style="font-size:85%;">(since 1994)</span></li> <li><a href="/wiki/Queqiao-2_relay_satellite" class="mw-redirect" title="Queqiao-2 relay satellite">Queqiao 2</a> <span style="font-size:85%;">(since 2024)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Infrared_telescope" title="Infrared telescope">Infrared</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Odin_(satellite)" title="Odin (satellite)">Odin</a> <span style="font-size:85%;">(since 2001)</span></li> <li><a href="/wiki/SOLAR_(ISS)" title="SOLAR (ISS)">SOLAR</a> <span style="font-size:85%;">(since 2008)</span></li> <li><a href="/wiki/James_Webb_Space_Telescope" title="James Webb Space Telescope">James Webb</a> <span style="font-size:85%;">(since 2022)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Optical_telescope" title="Optical telescope">Optical</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Stars-AO" title="Stars-AO">Aoi</a> <span style="font-size:85%;">(since 2018)</span></li> <li><a href="/wiki/Astrosat" class="mw-redirect" title="Astrosat">Astrosat</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/BRITE" title="BRITE">BRITE</a> constellation <span style="font-size:85%;">(since 2013)</span></li> <li><a href="/wiki/Chinese_H-alpha_Solar_Explorer" title="Chinese H-alpha Solar Explorer">CHASE</a> <span style="font-size:85%;">(since 2021)</span></li> <li><a href="/wiki/CHEOPS" title="CHEOPS">CHEOPS</a> <span style="font-size:85%;">(since 2019)</span></li> <li><a href="/wiki/Deep_Space_Climate_Observatory" title="Deep Space Climate Observatory">DSCOVR</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Euclid_(spacecraft)" title="Euclid (spacecraft)">Euclid</a> <span style="font-size:85%;">(since 2023)</span></li> <li><a href="/wiki/Hayabusa2#Mission_extension" title="Hayabusa2">Hayabusa2</a> <span style="font-size:85%;">(since 2021)</span></li> <li><a href="/wiki/Gaia_(spacecraft)" title="Gaia (spacecraft)">Gaia</a> <span style="font-size:85%;">(since 2013)</span></li> <li><a href="/wiki/HiRISE" title="HiRISE">HiRISE</a> <span style="font-size:85%;">(since 2005)</span></li> <li><a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble</a> <span style="font-size:85%;">(since 1990)</span></li> <li><a href="/wiki/Hinode_(satellite)" title="Hinode (satellite)">Hinode (Solar-B)</a> <span style="font-size:85%;">(since 2006)</span></li> <li><a href="/wiki/Near_Earth_Object_Surveillance_Satellite" title="Near Earth Object Surveillance Satellite">NEOSSat</a> <span style="font-size:85%;">(since 2013)</span></li> <li><a href="/wiki/Odin_(satellite)" title="Odin (satellite)">Odin</a> <span style="font-size:85%;">(since 2001)</span></li> <li><a href="/wiki/Solar_Dynamics_Observatory" title="Solar Dynamics Observatory">SDO</a> <span style="font-size:85%;">(since 2010)</span></li> <li><a href="/wiki/Solar_and_Heliospheric_Observatory" title="Solar and Heliospheric Observatory">SOHO</a> <span style="font-size:85%;">(since 1995)</span></li> <li><a href="/wiki/SOLAR_(ISS)" title="SOLAR (ISS)">SOLAR</a> <span style="font-size:85%;">(since 2008)</span></li> <li><a href="/wiki/Neil_Gehrels_Swift_Observatory" title="Neil Gehrels Swift Observatory">Swift</a> <span style="font-size:85%;">(since 2004)</span></li> <li><a href="/wiki/Transiting_Exoplanet_Survey_Satellite" title="Transiting Exoplanet Survey Satellite">TESS</a> <span style="font-size:85%;">(since 2018)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Ultraviolet_astronomy" title="Ultraviolet astronomy">Ultraviolet</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aditya-L1" title="Aditya-L1">Aditya-L1</a> <span style="font-size:85%;">(since 2023)</span></li> <li><a href="/wiki/Advanced_Space-based_Solar_Observatory" title="Advanced Space-based Solar Observatory">ASO-S</a> <span style="font-size:85%;">(since 2022)</span></li> <li><a href="/wiki/Astrosat" class="mw-redirect" title="Astrosat">Astrosat</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Hibari_(satellite)" class="mw-redirect" title="Hibari (satellite)">Hibari</a> <span style="font-size:85%;">(since 2021)</span></li> <li><a href="/wiki/Hinode_(satellite)" title="Hinode (satellite)">Hinode (Solar-B)</a> <span style="font-size:85%;">(since 2006)</span></li> <li><a href="/wiki/Interface_Region_Imaging_Spectrograph" title="Interface Region Imaging Spectrograph">IRIS</a> <span style="font-size:85%;">(since 2013)</span></li> <li><a href="/wiki/Solar_Dynamics_Observatory" title="Solar Dynamics Observatory">SDO</a> <span style="font-size:85%;">(since 2010)</span></li> <li><a href="/wiki/Solar_and_Heliospheric_Observatory" title="Solar and Heliospheric Observatory">SOHO</a> <span style="font-size:85%;">(since 1995)</span></li> <li><a href="/wiki/SOLAR_(ISS)" title="SOLAR (ISS)">SOLAR</a> <span style="font-size:85%;">(since 2008)</span></li> <li><a href="/wiki/Solar_Orbiter" title="Solar Orbiter">Solar Orbiter</a> <span style="font-size:85%;">(since 2020)</span></li> <li><a href="/wiki/STEREO" title="STEREO">STEREO</a> <span style="font-size:85%;">(since 2006)</span></li> <li><a href="/wiki/Neil_Gehrels_Swift_Observatory" title="Neil Gehrels Swift Observatory">Swift</a> <span style="font-size:85%;">(since 2004)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/X-ray_astronomy" title="X-ray astronomy">X-ray</a> and <a href="/wiki/Gamma-ray_astronomy" title="Gamma-ray astronomy">Gamma-ray</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Calorimetric_Electron_Telescope" title="Calorimetric Electron Telescope">CALET</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Chandra_X-ray_Observatory" title="Chandra X-ray Observatory">Chandra (AXAF)</a> <span style="font-size:85%;">(since 1999)</span></li> <li><a href="/wiki/Dark_Matter_Particle_Explorer" title="Dark Matter Particle Explorer">DAMPE</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Einstein_Probe" title="Einstein Probe">Einstein Probe</a> <span style="font-size:85%;">(since 2024)</span></li> <li><a href="/wiki/Hard_X-ray_Modulation_Telescope" title="Hard X-ray Modulation Telescope">HXMT (Insight)</a> <span style="font-size:85%;">(since 2017)</span></li> <li><a href="/wiki/INTEGRAL" title="INTEGRAL">INTEGRAL</a> <span style="font-size:85%;">(since 2002)</span></li> <li><a href="/wiki/Fermi_Gamma-ray_Space_Telescope" title="Fermi Gamma-ray Space Telescope">Fermi</a> <span style="font-size:85%;">(since 2008)</span></li> <li><a href="/wiki/Gravitational_Wave_High-energy_Electromagnetic_Counterpart_All-sky_Monitor" title="Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor">GECAM</a> <span style="font-size:85%;">(since 2020)</span></li> <li><a href="/wiki/IXPE" title="IXPE">IXPE</a> <span style="font-size:85%;">(since 2021)</span></li> <li><a href="/wiki/Spektr-RG" title="Spektr-RG">Spektr-RG</a> <span style="font-size:85%;">(since 2019)</span></li> <li><a href="/wiki/Space_Variable_Objects_Monitor" title="Space Variable Objects Monitor">SVOM</a> <span style="font-size:85%;">(since 2024)</span></li> <li><a href="/wiki/Neil_Gehrels_Swift_Observatory" title="Neil Gehrels Swift Observatory">Swift</a> <span style="font-size:85%;">(since 2004)</span></li> <li><a href="/wiki/Max_Valier_(satellite)" title="Max Valier (satellite)">Max Valier Sat</a> <span style="font-size:85%;">(since 2017)</span></li> <li><a href="/wiki/MAXI_(ISS_Experiment)" class="mw-redirect" title="MAXI (ISS Experiment)">MAXI</a> <span style="font-size:85%;">(since 2009)</span></li> <li><a href="/wiki/Miniature_X-ray_Solar_Spectrometer_CubeSat" title="Miniature X-ray Solar Spectrometer CubeSat">MinXSS-2</a> <span style="font-size:85%;">(since 2018)</span></li> <li><a href="/wiki/Neutron_Star_Interior_Composition_Explorer" title="Neutron Star Interior Composition Explorer">NICER</a> <span style="font-size:85%;">(since 2017)</span></li> <li><a href="/wiki/NuSTAR" title="NuSTAR">NuSTAR</a> <span style="font-size:85%;">(since 2012)</span></li> <li><a href="/wiki/Lobster_Eye_Imager_for_Astronomy" title="Lobster Eye Imager for Astronomy">LEIA</a> <span style="font-size:85%;">(since 2022)</span></li> <li><a href="/wiki/X-Ray_Imaging_and_Spectroscopy_Mission" title="X-Ray Imaging and Spectroscopy Mission">XRISM</a> <span style="font-size:85%;">(since 2023)</span></li> <li><a href="/wiki/XPoSat" title="XPoSat">XPoSat</a> <span style="font-size:85%;">(since 2024)</span></li> <li><a href="/wiki/XMM-Newton" title="XMM-Newton">XMM-Newton</a> <span style="font-size:85%;">(since 1999)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other (particle<br />or unclassified)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_Composition_Explorer" title="Advanced Composition Explorer">ACE</a> <span style="font-size:85%;">(since 1997)</span></li> <li><a href="/wiki/Alpha_Magnetic_Spectrometer" title="Alpha Magnetic Spectrometer">AMS-02</a> <span style="font-size:85%;">(since 2011)</span></li> <li><a href="/wiki/Calorimetric_Electron_Telescope" title="Calorimetric Electron Telescope">CALET</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Dark_Matter_Particle_Explorer" title="Dark Matter Particle Explorer">DAMPE</a> <span style="font-size:85%;">(since 2015)</span></li> <li><a href="/wiki/Interstellar_Boundary_Explorer" title="Interstellar Boundary Explorer">IBEX</a> <span style="font-size:85%;">(since 2008)</span></li> <li><a href="/wiki/Cosmic_Ray_Energetics_and_Mass_Experiment#ISS-CREAM" title="Cosmic Ray Energetics and Mass Experiment">ISS-CREAM</a> <span style="font-size:85%;">(since 2017)</span></li> <li><a href="/wiki/JEM-EUSO" title="JEM-EUSO">Mini-EUSO</a> <span style="font-size:85%;">(since 2019)</span></li> <li><a href="/wiki/Solar_and_Heliospheric_Observatory" title="Solar and Heliospheric Observatory">SOHO</a> <span style="font-size:85%;">(since 1995)</span></li> <li><a href="/wiki/Solar_Orbiter" title="Solar Orbiter">Solar Orbiter</a> <span style="font-size:85%;">(since 2020)</span></li> <li><a href="/wiki/STEREO" title="STEREO">STEREO</a> <span style="font-size:85%;">(since 2006)</span></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Planned</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/PETREL" title="PETREL">PETREL</a> <span style="font-size:85%;">(2025)</span></li> <li><a href="/wiki/SPHEREx" title="SPHEREx">SPHEREx</a> <span style="font-size:85%;">(2025)</span></li> <li><a href="/wiki/JEM-EUSO" title="JEM-EUSO">K-EUSO</a> <span style="font-size:85%;">(2026)</span></li> <li><a href="/wiki/Nancy_Grace_Roman_Space_Telescope" title="Nancy Grace Roman Space Telescope">Nancy Grace Roman Space Telescope</a> <span style="font-size:85%;">(2026)</span></li> <li><a href="/wiki/PLATO_(spacecraft)" title="PLATO (spacecraft)">PLATO</a> <span style="font-size:85%;">(2026)</span></li> <li><a href="/wiki/Xuntian" title="Xuntian">Xuntian</a> <span style="font-size:85%;">(2026)</span></li> <li><a href="/wiki/Compton_Spectrometer_and_Imager" title="Compton Spectrometer and Imager">COSI</a> <span style="font-size:85%;">(2027)</span></li> <li><a href="/wiki/Luna_26#Scientific_payload" title="Luna 26">LORD</a> <span style="font-size:85%;">(2027)</span></li> <li><a href="/wiki/NEO_Surveyor" title="NEO Surveyor">NEO Surveyor</a> <span style="font-size:85%;">(2027)</span></li> <li><a href="/wiki/JASMINE_(satellite)" class="mw-redirect" title="JASMINE (satellite)">JASMINE</a> <span style="font-size:85%;">(2028)</span></li> <li><a href="/wiki/Solar-C_EUVST" class="mw-redirect" title="Solar-C EUVST">Solar-C EUVST</a> <span style="font-size:85%;">(2028)</span></li> <li><a href="/wiki/ARIEL" title="ARIEL">ARIEL</a> <span style="font-size:85%;">(2029)</span></li> <li><a href="/wiki/Spektr-UV" title="Spektr-UV">Spektr-UV</a> <span style="font-size:85%;">(2030)</span></li> <li><a href="/wiki/UVEX" title="UVEX">UVEX</a> <span style="font-size:85%;">(2030)</span></li> <li><a href="/wiki/Spektr-M" title="Spektr-M">Spektr-M</a> <span style="font-size:85%;">(2030+)</span></li> <li><a href="/wiki/LiteBIRD" title="LiteBIRD">LiteBIRD</a> <span style="font-size:85%;">(2032)</span></li> <li><a href="/wiki/Taiji_Program_in_Space" class="mw-redirect" title="Taiji Program in Space">Taiji</a> <span style="font-size:85%;">(2033)</span></li> <li><a href="/wiki/Advanced_Telescope_for_High_Energy_Astrophysics" title="Advanced Telescope for High Energy Astrophysics">Athena</a> <span style="font-size:85%;">(2035)</span></li> <li><a href="/wiki/Laser_Interferometer_Space_Antenna" title="Laser Interferometer Space Antenna">LISA</a> <span style="font-size:85%;">(2035)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_proposed_space_observatories" class="mw-redirect" title="List of proposed space observatories">Proposed</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Arcus_(satellite)" title="Arcus (satellite)">Arcus</a></li> <li><a href="/w/index.php?title=Astro-1_Telescope&action=edit&redlink=1" class="new" title="Astro-1 Telescope (page does not exist)">Astro-1 Telescope</a></li> <li><a href="/wiki/AstroSat-2" title="AstroSat-2">AstroSat-2</a></li> <li><a href="/wiki/Exoplanetary_Circumstellar_Environments_and_Disk_Explorer" title="Exoplanetary Circumstellar Environments and Disk Explorer">EXCEDE</a></li> <li><a href="/wiki/Fresnel_Imager" class="mw-redirect" title="Fresnel Imager">Fresnel Imager</a></li> <li><a href="/wiki/FOCAL_(spacecraft)" title="FOCAL (spacecraft)">FOCAL</a></li> <li><a href="/wiki/Galileo_Solar_Space_Telescope" title="Galileo Solar Space Telescope">GSST-PMM</a></li> <li><a href="/wiki/Habitable_Exoplanets_Observatory" title="Habitable Exoplanets Observatory">HabEx</a></li> <li><a href="/wiki/Habitable_Worlds_Observatory" title="Habitable Worlds Observatory">HWO</a></li> <li><a href="/wiki/Hypertelescope" class="mw-redirect" title="Hypertelescope">Hypertelescope</a></li> <li><a href="/wiki/International_Lunar_Observatory" title="International Lunar Observatory">ILO-1</a></li> <li><a href="/wiki/MAXI_(ISS_experiment)#iWF-MAXI" title="MAXI (ISS experiment)">iWF-MAXI</a></li> <li><a href="/wiki/JEM-EUSO" title="JEM-EUSO">JEM-EUSO</a></li> <li><a href="/wiki/Lunar_Ultraviolet_Cosmic_Imager" title="Lunar Ultraviolet Cosmic Imager">LUCI</a></li> <li><a href="/wiki/Large_Ultraviolet_Optical_Infrared_Surveyor" title="Large Ultraviolet Optical Infrared Surveyor">LUVOIR</a></li> <li><a href="/wiki/Lynx_X-ray_Observatory" title="Lynx X-ray Observatory">Lynx</a></li> <li><a href="/wiki/Nano-JASMINE" title="Nano-JASMINE">Nano-JASMINE</a></li> <li><a href="/wiki/Nautilus_Deep_Space_Observatory" title="Nautilus Deep Space Observatory">Nautilus Deep Space Observatory</a></li> <li><a href="/wiki/New_Worlds_Mission" title="New Worlds Mission">New Worlds Mission</a></li> <li><a href="/wiki/2012_National_Reconnaissance_Office_space_telescope_donation_to_NASA" title="2012 National Reconnaissance Office space telescope donation to NASA">NRO donation to NASA</a></li> <li><a href="/wiki/Orbiting_Binary_Black_Hole_Investigation_Satellite" title="Orbiting Binary Black Hole Investigation Satellite">ORBIS</a></li> <li><a href="/wiki/Origins_Space_Telescope" title="Origins Space Telescope">OST</a></li> <li><a href="/wiki/FOXSI_Sounding_Rocket" title="FOXSI Sounding Rocket">PhoENiX</a></li> <li><a href="/w/index.php?title=Solar-D&action=edit&redlink=1" class="new" title="Solar-D (page does not exist)">Solar-D</a></li> <li><a href="/wiki/Space_Solar_Telescope" title="Space Solar Telescope">Space Solar Telescope</a></li> <li><a href="/wiki/Telescope_for_Habitable_Exoplanets_and_Interstellar/Intergalactic_Astronomy" title="Telescope for Habitable Exoplanets and Interstellar/Intergalactic Astronomy">THEIA</a></li> <li><a href="/wiki/THESEUS_(satellite)" class="mw-redirect" title="THESEUS (satellite)">THESEUS</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Retired</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AGILE_(satellite)" title="AGILE (satellite)">AGILE</a> <span style="font-size:85%;">(2007–2024)</span></li> <li><a href="/wiki/Akari_(satellite)" title="Akari (satellite)">Akari (Astro-F)</a> <span style="font-size:85%;">(2006–2011)</span></li> <li><a href="/wiki/Array_of_Low_Energy_X-ray_Imaging_Sensors" title="Array of Low Energy X-ray Imaging Sensors">ALEXIS</a> <span style="font-size:85%;">(1993–2005)</span></li> <li><a href="/wiki/Alouette_1" title="Alouette 1">Alouette 1</a> <span style="font-size:85%;">(1962–1972)</span></li> <li><a href="/wiki/Ariel_1" title="Ariel 1">Ariel 1</a> <span style="font-size:85%;">(1962, 1964)</span></li> <li><a href="/wiki/Ariel_2" title="Ariel 2">Ariel 2</a> <span style="font-size:85%;">(1964)</span></li> <li><a href="/wiki/Ariel_3" title="Ariel 3">Ariel 3</a> <span style="font-size:85%;">(1967–1969)</span></li> <li><a href="/wiki/Ariel_4" title="Ariel 4">Ariel 4</a> <span style="font-size:85%;">(1971–1972)</span></li> <li><a href="/wiki/Ariel_5" title="Ariel 5">Ariel 5</a> <span style="font-size:85%;">(1974–1980)</span></li> <li><a href="/wiki/Ariel_6" class="mw-redirect" title="Ariel 6">Ariel 6</a> <span style="font-size:85%;">(1979–1982)</span></li> <li><a href="/wiki/ASTERIA_(spacecraft)" title="ASTERIA (spacecraft)">ASTERIA</a> <span style="font-size:85%;">(2017–2019)</span></li> <li><a href="/wiki/Apollo_Telescope_Mount" title="Apollo Telescope Mount">ATM</a> <span style="font-size:85%;">(1973–1974)</span></li> <li><a href="/wiki/Advanced_Satellite_for_Cosmology_and_Astrophysics" title="Advanced Satellite for Cosmology and Astrophysics">ASCA (Astro-D)</a> <span style="font-size:85%;">(1993–2000)</span></li> <li><a href="/wiki/STS-35" title="STS-35">Astro-1</a> <span style="font-size:85%;">(1990)</span> <ul><li><a href="/wiki/Broad_Band_X-ray_Telescope" title="Broad Band X-ray Telescope">BBXRT</a></li> <li><a href="/wiki/Hopkins_Ultraviolet_Telescope" title="Hopkins Ultraviolet Telescope">HUT</a></li></ul></li> <li><a href="/wiki/STS-67" title="STS-67">Astro-2</a> (<a href="/wiki/Hopkins_Ultraviolet_Telescope" title="Hopkins Ultraviolet Telescope">HUT</a>) <span style="font-size:85%;">(1995)</span></li> <li><a href="/wiki/Astron_(spacecraft)" title="Astron (spacecraft)">Astron</a> <span style="font-size:85%;">(1983–1991)</span></li> <li><a href="/wiki/Astronomical_Netherlands_Satellite" title="Astronomical Netherlands Satellite">ANS</a> <span style="font-size:85%;">(1974–1976)</span></li> <li><a href="/wiki/BeppoSAX" title="BeppoSAX">BeppoSAX</a> <span style="font-size:85%;">(1996–2003)</span></li> <li><a href="/wiki/CHIPSat" class="mw-redirect" title="CHIPSat">CHIPSat</a> <span style="font-size:85%;">(2003–2008)</span></li> <li><a href="/wiki/Compton_Gamma_Ray_Observatory" title="Compton Gamma Ray Observatory">Compton (CGRO)</a> <span style="font-size:85%;">(1991–2000)</span></li> <li><a href="/wiki/CoRoT" title="CoRoT">CoRoT</a> <span style="font-size:85%;">(2006–2013)</span></li> <li><a href="/wiki/Cos-B" title="Cos-B">Cos-B</a> <span style="font-size:85%;">(1975–1982)</span></li> <li><a href="/wiki/Cosmic_Background_Explorer" title="Cosmic Background Explorer">COBE</a> <span style="font-size:85%;">(1989–1993)</span></li> <li><a href="/wiki/CXBN-2" title="CXBN-2">CXBN-2</a> <span style="font-size:85%;">(2017–2019)</span></li> <li><a href="/wiki/STS-54#Mission_highlights" title="STS-54">DXS</a> <span style="font-size:85%;">(1993)</span></li> <li><a href="/wiki/EPOXI#EPOCh" title="EPOXI">EPOCh</a> <span style="font-size:85%;">(2008)</span></li> <li><a href="/wiki/EPOXI" title="EPOXI">EPOXI</a> <span style="font-size:85%;">(2010)</span></li> <li><a href="/wiki/Explorer_11" title="Explorer 11">Explorer 11</a> <span style="font-size:85%;">(1961)</span></li> <li><a href="/wiki/EXOSAT" title="EXOSAT">EXOSAT</a> <span style="font-size:85%;">(1983–1986)</span></li> <li><a href="/wiki/Extreme_Ultraviolet_Explorer" title="Extreme Ultraviolet Explorer">EUVE</a> <span style="font-size:85%;">(1992–2001)</span></li> <li><a href="/wiki/Far_Ultraviolet_Spectroscopic_Explorer" title="Far Ultraviolet Spectroscopic Explorer">FUSE</a> <span style="font-size:85%;">(1999–2007)</span></li> <li><a href="/wiki/Kvant-1" title="Kvant-1">Kvant-1</a> <span style="font-size:85%;">(1987–2001)</span></li> <li><a href="/wiki/GALEX" title="GALEX">GALEX</a> <span style="font-size:85%;">(2003–2013)</span></li> <li><a href="/wiki/Gamma_(satellite)" title="Gamma (satellite)">Gamma</a> <span style="font-size:85%;">(1990–1992)</span></li> <li><a href="/wiki/Ginga_(satellite)" title="Ginga (satellite)">Ginga (Astro-C)</a> <span style="font-size:85%;">(1987–1991)</span></li> <li><a href="/wiki/Granat" title="Granat">Granat</a> <span style="font-size:85%;">(1989–1998)</span></li> <li><a href="/wiki/Hakucho" title="Hakucho">Hakucho (CORSA-b)</a> <span style="font-size:85%;">(1979–1985)</span></li> <li><a href="/wiki/HALCA" title="HALCA">HALCA (MUSES-B)</a> <span style="font-size:85%;">(1997–2005)</span></li> <li><a href="/wiki/High_Energy_Astronomy_Observatory_1" title="High Energy Astronomy Observatory 1">HEAO-1</a> <span style="font-size:85%;">(1977–1979)</span></li> <li><a href="/wiki/Herschel_Space_Observatory" title="Herschel Space Observatory">Herschel</a> <span style="font-size:85%;">(2009–2013)</span></li> <li><a href="/wiki/Hinotori_(satellite)" title="Hinotori (satellite)">Hinotori (Astro-A)</a> <span style="font-size:85%;">(1981–1991)</span></li> <li><a href="/wiki/Hisaki_(satellite)" title="Hisaki (satellite)">Hisaki (SPRINT-A)</a> <span style="font-size:85%;">(2013–2023)</span></li> <li><a href="/wiki/Einstein_Observatory" title="Einstein Observatory">HEAO-2 (Einstein Obs.)</a> <span style="font-size:85%;">(1978–1982)</span></li> <li><a href="/wiki/High_Energy_Astronomy_Observatory_3" title="High Energy Astronomy Observatory 3">HEAO-3</a> <span style="font-size:85%;">(1979–1981)</span></li> <li><a href="/wiki/High_Energy_Transient_Explorer" class="mw-redirect" title="High Energy Transient Explorer">HETE-2</a> <span style="font-size:85%;">(2000–2008)</span></li> <li><a href="/wiki/Hipparcos" title="Hipparcos">Hipparcos</a> <span style="font-size:85%;">(1989–1993)</span></li> <li><a href="/wiki/International_Lunar_Observatory" title="International Lunar Observatory">ILO-X</a> <span style="font-size:85%;">(2024)</span></li> <li><a href="/wiki/IRAS" title="IRAS">IRAS</a> <span style="font-size:85%;">(1983)</span></li> <li><a href="/wiki/Space_Flyer_Unit#Experimentation_data" title="Space Flyer Unit">IRTS</a> <span style="font-size:85%;">(1995–1996)</span></li> <li><a href="/wiki/Infrared_Space_Observatory" title="Infrared Space Observatory">ISO</a> <span style="font-size:85%;">(1996–1998)</span></li> <li><a href="/wiki/International_Ultraviolet_Explorer" title="International Ultraviolet Explorer">IUE</a> <span style="font-size:85%;">(1978–1996)</span></li> <li><a href="/wiki/Indian_Remote_Sensing_Programme" title="Indian Remote Sensing Programme">IXAE</a> <span style="font-size:85%;">(1996–2004)</span></li> <li><a href="/wiki/Kepler_space_telescope" title="Kepler space telescope">Kepler</a> <span style="font-size:85%;">(2009–2018)</span></li> <li><a href="/wiki/Kristall" title="Kristall">Kristall</a> <span style="font-size:85%;">(1990–2001)</span></li> <li><a href="/wiki/LEGRI" title="LEGRI">LEGRI</a> <span style="font-size:85%;">(1997–2002)</span></li> <li><a href="/wiki/LISA_Pathfinder" title="LISA Pathfinder">LISA Pathfinder</a> <span style="font-size:85%;">(2015–2017)</span></li> <li><a href="/wiki/Miniature_X-ray_Solar_Spectrometer_CubeSat" title="Miniature X-ray Solar Spectrometer CubeSat">MinXSS</a> <span style="font-size:85%;">(2015–2017)</span></li> <li><a href="/wiki/MOST_(satellite)" class="mw-redirect" title="MOST (satellite)">MOST</a> <span style="font-size:85%;">(2003–2019)</span></li> <li><a href="/wiki/Midcourse_Space_Experiment" title="Midcourse Space Experiment">MSX</a> <span style="font-size:85%;">(1996–1997)</span></li> <li><a href="/wiki/Mikhailo_Lomonosov_(satellite)" title="Mikhailo Lomonosov (satellite)">Mikhailo Lomonosov</a> <span style="font-size:85%;">(2016–2019?)</span></li> <li><a href="/wiki/Orbiting_Astronomical_Observatory_2" title="Orbiting Astronomical Observatory 2">OAO-2</a> <span style="font-size:85%;">(1968–1973)</span></li> <li><a href="/wiki/Orbiting_Astronomical_Observatory#OAO-3_(Copernicus)" title="Orbiting Astronomical Observatory">OAO-3 (Copernicus)</a> <span style="font-size:85%;">(1972–1981)</span></li> <li><a href="/wiki/Orbiting_Solar_Observatory" title="Orbiting Solar Observatory">Orbiting Solar Observatory</a> <ul><li><a href="/wiki/OSO_1" class="mw-redirect" title="OSO 1">OSO 1</a></li> <li><a href="/wiki/Orbiting_Solar_Observatory" title="Orbiting Solar Observatory">OSO B</a></li> <li><a href="/wiki/OSO_3" title="OSO 3">OSO 3</a></li> <li><a href="/wiki/OSO_4" class="mw-redirect" title="OSO 4">OSO 4</a></li> <li><a href="/wiki/OSO_5" class="mw-redirect" title="OSO 5">OSO 5</a></li> <li><a href="/wiki/OSO_6" class="mw-redirect" title="OSO 6">OSO 6</a></li> <li><a href="/wiki/OSO_7" title="OSO 7">OSO 7</a></li> <li><a href="/wiki/OSO_8" class="mw-redirect" title="OSO 8">OSO 8</a></li></ul></li> <li><a href="/wiki/Orion_(space_telescope)" title="Orion (space telescope)">Orion 1</a> <span style="font-size:85%;">(1971)</span></li> <li><a href="/wiki/Orion_(space_telescope)" title="Orion (space telescope)">Orion 2</a> <span style="font-size:85%;">(1973)</span></li> <li><a href="/wiki/PAMELA_detector" title="PAMELA detector">PAMELA</a> <span style="font-size:85%;">(2006–2016)</span></li> <li><a href="/wiki/PicSat" title="PicSat">PicSat</a> <span style="font-size:85%;">(2018)</span></li> <li><a href="/wiki/Planck_(spacecraft)" title="Planck (spacecraft)">Planck</a> <span style="font-size:85%;">(2009–2013)</span></li> <li><a href="/wiki/RELIKT-1" title="RELIKT-1">RELIKT-1</a> <span style="font-size:85%;">(1983–1984)</span></li> <li><a href="/wiki/Reuven_Ramaty_High_Energy_Solar_Spectroscopic_Imager" title="Reuven Ramaty High Energy Solar Spectroscopic Imager">R/HESSI</a> <span style="font-size:85%;">(2002–2018)</span></li> <li><a href="/wiki/ROSAT" title="ROSAT">ROSAT</a> <span style="font-size:85%;">(1990–1999)</span></li> <li><a href="/wiki/Rossi_X-ray_Timing_Explorer" title="Rossi X-ray Timing Explorer">RXTE</a> <span style="font-size:85%;">(1995–2012)</span></li> <li><a href="/wiki/Solar_Anomalous_and_Magnetospheric_Particle_Explorer" title="Solar Anomalous and Magnetospheric Particle Explorer">SAMPEX</a> <span style="font-size:85%;">(1992–2004)</span></li> <li><a href="/wiki/Small_Astronomy_Satellite_2" title="Small Astronomy Satellite 2">SAS-B</a> <span style="font-size:85%;">(1972–1973)</span></li> <li><a href="/wiki/Small_Astronomy_Satellite_3" title="Small Astronomy Satellite 3">SAS-C</a> <span style="font-size:85%;">(1975–1979)</span></li> <li><a href="/wiki/Solwind" title="Solwind">Solwind</a> <span style="font-size:85%;">(1979–1985)</span></li> <li><a href="/wiki/Spektr-R" title="Spektr-R">Spektr-R</a> <span style="font-size:85%;">(2011–2019)</span></li> <li><a href="/wiki/Spitzer_Space_Telescope" title="Spitzer Space Telescope">Spitzer</a> <span style="font-size:85%;">(2003–2020)</span></li> <li><a href="/wiki/Suzaku_(satellite)" title="Suzaku (satellite)">Suzaku (Astro-EII)</a> <span style="font-size:85%;">(2005–2015)</span></li> <li><a href="/wiki/Solar_Radiation_and_Thermospheric_Satellite" title="Solar Radiation and Thermospheric Satellite">Taiyo (SRATS)</a> <span style="font-size:85%;">(1975–1980)</span></li> <li><a href="/wiki/Tenma" title="Tenma">Tenma (Astro-B)</a> <span style="font-size:85%;">(1983–1985)</span></li> <li><a href="/wiki/Uhuru_(satellite)" title="Uhuru (satellite)">Uhuru</a> <span style="font-size:85%;">(1970–1973)</span></li> <li><a href="/wiki/Vanguard_3" title="Vanguard 3">Vanguard 3</a> <span style="font-size:85%;">(1959)</span></li> <li><a href="/wiki/Wilkinson_Microwave_Anisotropy_Probe" title="Wilkinson Microwave Anisotropy Probe">WMAP</a> <span style="font-size:85%;">(2001–2010)</span></li> <li><a href="/wiki/Wide-field_Infrared_Survey_Explorer" title="Wide-field Infrared Survey Explorer">WISE</a> <span style="font-size:85%;">(2009–2024)</span></li> <li><a href="/wiki/Yohkoh" title="Yohkoh">Yokoh (Solar-A)</a> <span style="font-size:85%;">(1991–2001)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Hibernating <br /><span style="font-size:85%;">(Mission completed)</span></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Submillimeter_Wave_Astronomy_Satellite" title="Submillimeter Wave Astronomy Satellite">SWAS</a> <span style="font-size:85%;">(1998–2005)</span></li> <li><a href="/wiki/TRACE" title="TRACE">TRACE</a> <span style="font-size:85%;">(1998–2010)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lost/Failed</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Orbiting_Astronomical_Observatory#OAO-1" title="Orbiting Astronomical Observatory">OAO-1</a> <span style="font-size:85%;">(1966)</span></li> <li><a href="/wiki/Orbiting_Astronomical_Observatory#OAO-B" title="Orbiting Astronomical Observatory">OAO-B</a> <span style="font-size:85%;">(1970)</span></li> <li><a href="/wiki/Cosmic_Radiation_Satellite" title="Cosmic Radiation Satellite">CORSA</a> <span style="font-size:85%;">(1976)</span></li> <li><a href="/wiki/CXBN" title="CXBN">CXBN</a> <span style="font-size:85%;">(2012–2013)</span></li> <li><a href="/wiki/Orbiting_Solar_Observatory" title="Orbiting Solar Observatory">OSO C</a> <span style="font-size:85%;">(1965)</span></li> <li><a href="/wiki/ABRIXAS" title="ABRIXAS">ABRIXAS</a> <span style="font-size:85%;">(1999)</span></li> <li><a href="/wiki/High_Energy_Transient_Explorer" class="mw-redirect" title="High Energy Transient Explorer">HETE-1</a> <span style="font-size:85%;">(1996)</span></li> <li><a href="/wiki/Wide_Field_Infrared_Explorer" title="Wide Field Infrared Explorer">WIRE</a> <span style="font-size:85%;">(1999)</span></li> <li><a href="/wiki/Suzaku_(satellite)#ASTRO-E" title="Suzaku (satellite)">Astro-E</a> <span style="font-size:85%;">(2000)</span></li> <li><a href="/wiki/TSUBAME_(satellite)" title="TSUBAME (satellite)">Tsubame</a> <span style="font-size:85%;">(2014–2015)</span></li> <li><a href="/wiki/Hitomi_(satellite)" title="Hitomi (satellite)">Hitomi (Astro-H)</a> <span style="font-size:85%;">(2016)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cancelled</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aelita_(spacecraft)" title="Aelita (spacecraft)">Aelita</a></li> <li><a href="/wiki/AOSO" class="mw-redirect" title="AOSO">AOSO</a></li> <li><a href="/wiki/Astro-G" title="Astro-G">Astro-G</a></li> <li><a href="/wiki/Constellation-X_Observatory" title="Constellation-X Observatory">Constellation-X</a></li> <li><i><a href="/wiki/Darwin_(spacecraft)" title="Darwin (spacecraft)">Darwin</a></i></li> <li><a href="/wiki/Dark_Energy_Space_Telescope" class="mw-redirect" title="Dark Energy Space Telescope">Destiny</a></li> <li><a href="/wiki/EChO" title="EChO">EChO</a></li> <li><i><a href="/wiki/Eddington_(spacecraft)" title="Eddington (spacecraft)">Eddington</a></i></li> <li><a href="/wiki/Full-sky_Astrometric_Mapping_Explorer" title="Full-sky Astrometric Mapping Explorer">FAME</a></li> <li><a href="/wiki/Fast_Infrared_Exoplanet_Spectroscopy_Survey_Explorer" title="Fast Infrared Exoplanet Spectroscopy Survey Explorer">FINESSE</a></li> <li><a href="/wiki/Gravity_and_Extreme_Magnetism" class="mw-redirect" title="Gravity and Extreme Magnetism">GEMS</a></li> <li><a href="/wiki/Hubble_Origins_Probe" title="Hubble Origins Probe">HOP</a></li> <li><a href="/wiki/International_X-ray_Observatory" title="International X-ray Observatory">IXO</a></li> <li><a href="/wiki/Joint_Dark_Energy_Mission" title="Joint Dark Energy Mission">JDEM</a></li> <li><a href="/wiki/LOFT" title="LOFT">LOFT</a></li> <li><a href="/wiki/OSO_J" class="mw-redirect" title="OSO J">OSO J</a></li> <li><a href="/wiki/OSO_K" class="mw-redirect" title="OSO K">OSO K</a></li> <li><a href="/wiki/Sentinel_Space_Telescope" title="Sentinel Space Telescope">Sentinel</a></li> <li><a href="/wiki/Space_Interferometry_Mission" title="Space Interferometry Mission">SIM & SIMlite</a></li> <li><a href="/wiki/Supernova/Acceleration_Probe" class="mw-redirect" title="Supernova/Acceleration Probe">SNAP</a></li> <li><a href="/wiki/SPICA_(spacecraft)" title="SPICA (spacecraft)">SPICA</a></li> <li><a href="/wiki/Sky_Polarization_Observatory" title="Sky Polarization Observatory">SPOrt</a></li> <li><a href="/wiki/TAUVEX" title="TAUVEX">TAUVEX</a></li> <li><a href="/wiki/Terrestrial_Planet_Finder" title="Terrestrial Planet Finder">TPF</a></li> <li><a href="/wiki/XEUS" title="XEUS">XEUS</a></li> <li><a href="/w/index.php?title=XIPE&action=edit&redlink=1" class="new" title="XIPE (page does not exist)">XIPE</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Great_Observatories_program" title="Great Observatories program">Great Observatories program</a></li> <li><a href="/wiki/List_of_space_telescopes" title="List of space telescopes">List of space telescopes</a></li> <li><a href="/wiki/List_of_proposed_space_telescopes" title="List of proposed space telescopes">List of proposed space telescopes</a></li> <li><a href="/wiki/X-ray_telescope" title="X-ray telescope">X-ray telescope</a></li> <li><a href="/wiki/List_of_heliophysics_missions" title="List of heliophysics missions">List of heliophysics missions</a></li> <li><a href="/wiki/List_of_planetariums" title="List of planetariums">List of planetariums</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Space_telescopes" title="Category:Space telescopes">Category:Space telescopes</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><style data-mw-deduplicate="TemplateStyles:r1239334494">@media screen{html.skin-theme-clientpref-night .mw-parser-output div:not(.notheme)>.tmp-color,html.skin-theme-clientpref-night .mw-parser-output p>.tmp-color,html.skin-theme-clientpref-night .mw-parser-output table:not(.notheme) .tmp-color{color:inherit!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output div:not(.notheme)>.tmp-color,html.skin-theme-clientpref-os .mw-parser-output p>.tmp-color,html.skin-theme-clientpref-os .mw-parser-output table:not(.notheme) .tmp-color{color:inherit!important}}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239334494"></div><div role="navigation" class="navbox" aria-labelledby="Explorers_Program" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Explorers_Program" title="Template:Explorers Program"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Explorers_Program" title="Template talk:Explorers Program"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Explorers_Program" title="Special:EditPage/Template:Explorers Program"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Explorers_Program" style="font-size:114%;margin:0 4em"><a href="/wiki/Explorers_Program" title="Explorers Program">Explorers Program</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div><a href="/wiki/List_of_Explorers_Program_missions" class="mw-redirect" title="List of Explorers Program missions">List of Explorers Program missions</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Missions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:5em">1958–1992</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Explorer_1" title="Explorer 1">Explorer 1</a></li> <li><a href="/wiki/Explorer_2" title="Explorer 2">2</a><sup>†</sup></li> <li><a href="/wiki/Explorer_3" title="Explorer 3">3</a></li> <li><a href="/wiki/Explorer_4" title="Explorer 4">4</a></li> <li><a href="/wiki/Explorer_5" title="Explorer 5">5</a><sup>†</sup></li> <li><a href="/wiki/S-1_(satellite)" class="mw-redirect" title="S-1 (satellite)">S-1</a><sup>†</sup></li> <li><a href="/wiki/Explorer_6" title="Explorer 6">6 (S-2)</a></li> <li><a href="/wiki/Explorer_7" title="Explorer 7">7 (S-1A)</a></li> <li><a href="/wiki/S-46A" class="mw-redirect" title="S-46A">S-46A</a><sup>†</sup></li> <li><a href="/wiki/Explorer_8" title="Explorer 8">8</a></li> <li><a href="/wiki/S-56_(satellite)" class="mw-redirect" title="S-56 (satellite)">S-56</a><sup>†</sup></li> <li><a href="/wiki/Explorer_9" title="Explorer 9">9 (S-56A)</a></li> <li><a href="/wiki/S-45_(satellite)" class="mw-redirect" title="S-45 (satellite)">S-45</a><sup>†</sup></li> <li><a href="/wiki/Explorer_10" title="Explorer 10">10</a></li> <li><a href="/wiki/Explorer_11" title="Explorer 11">11 (S-15)</a></li> <li><a href="/wiki/S-45A" class="mw-redirect" title="S-45A">S-45A</a><sup>†</sup></li> <li><a href="/wiki/S-55_(satellite)" class="mw-redirect" title="S-55 (satellite)">S-55</a><sup>†</sup></li> <li><a href="/wiki/Explorer_12" title="Explorer 12">12 (EPE-A)</a></li> <li><a href="/wiki/Explorer_13" title="Explorer 13">13 (S-55A)</a></li> <li><a href="/wiki/Explorer_14" title="Explorer 14">14 (EPE-B)</a></li> <li><a href="/wiki/Explorer_15" title="Explorer 15">15 (EPE-C)</a></li> <li><a href="/wiki/Explorer_16" title="Explorer 16">16 (S-55B)</a></li> <li><a href="/wiki/Explorer_17" title="Explorer 17">17 (AE-A)</a></li> <li><a href="/wiki/Explorer_18" title="Explorer 18">18 (IMP-A)</a></li> <li><a href="/wiki/Explorer_19" title="Explorer 19">19 (AD-A)</a></li> <li><a href="/wiki/S-66A" class="mw-redirect" title="S-66A">S-66A (BE-A)</a><sup>†</sup></li> <li><a href="/wiki/Explorer_20" title="Explorer 20">20 (IE-A)</a></li> <li><a href="/wiki/Explorer_21" title="Explorer 21">21 (IMP-B)</a></li> <li><a href="/wiki/Explorer_22" title="Explorer 22">22 (BE-B)</a></li> <li><a href="/wiki/Explorer_23" title="Explorer 23">23 (S-55C)</a></li> <li><a href="/wiki/Explorer_24" title="Explorer 24">24 (AD-B)</a></li> <li><a href="/wiki/Injun_(satellite)" title="Injun (satellite)">25 (Injun 4, IE-B)</a></li> <li><a href="/wiki/Explorer_26" title="Explorer 26">26 (EPE-D)</a></li> <li><a href="/wiki/Explorer_27" title="Explorer 27">27 (BE-C)</a></li> <li><a href="/wiki/Explorer_28" title="Explorer 28">28 (IMP-C)</a></li> <li><a href="/wiki/Explorer_29" title="Explorer 29">29 (GEOS-A)</a></li> <li><a href="/wiki/Solrad_8" class="mw-redirect" title="Solrad 8">30 (Solrad 8)</a></li> <li><a href="/wiki/Explorer_31" title="Explorer 31">31 (DME-A)</a></li> <li><a href="/wiki/Explorer_32" title="Explorer 32">32 (AE-B)</a></li> <li><a href="/wiki/Explorer_33" title="Explorer 33">33 (IMP-D)</a></li> <li><a href="/wiki/Explorer_34" title="Explorer 34">34 (IMP-F)</a></li> <li><a href="/wiki/Explorer_35" title="Explorer 35">35 (IMP-E)</a></li> <li><a href="/wiki/Explorer_36" title="Explorer 36">36 (GEOS-B)</a></li> <li><a href="/wiki/Solrad_9" class="mw-redirect" title="Solrad 9">37 (Solrad 9)</a></li> <li><a href="/wiki/Explorer_38" title="Explorer 38">38 (RAE-A)</a></li> <li><a href="/wiki/Explorer_39" title="Explorer 39">39 (AD-C)</a></li> <li><a href="/wiki/Injun_(satellite)" title="Injun (satellite)">40 (Injun 5)</a></li> <li><a href="/wiki/Explorer_41" title="Explorer 41">41 (IMP-G)</a></li> <li><a href="/wiki/Uhuru_(satellite)" title="Uhuru (satellite)">42 (Uhuru, SAS-A)</a></li> <li><a href="/wiki/Explorer_43" title="Explorer 43">43 (IMP-I)</a></li> <li><a href="/wiki/Solrad_10" class="mw-redirect" title="Solrad 10">44 (Solrad 10)</a></li> <li><a href="/wiki/Explorer_45" title="Explorer 45">45 (SSS-A)</a></li> <li><a href="/wiki/Explorer_46" title="Explorer 46">46 (MTS)</a></li> <li><a href="/wiki/Explorer_47" title="Explorer 47">47 (IMP-H)</a></li> <li><a href="/wiki/Small_Astronomy_Satellite_2" title="Small Astronomy Satellite 2">48 (SAS-B)</a></li> <li><a href="/wiki/Explorer_49" title="Explorer 49">49 (RAE-B)</a></li> <li><a href="/wiki/Explorer_50" title="Explorer 50">50 (IMP-J)</a></li> <li><a href="/wiki/Explorer_51" title="Explorer 51">51 (AE-C)</a></li> <li><a href="/wiki/Explorer_52" title="Explorer 52">52 (Hawkeye 1)</a></li> <li><a href="/wiki/Small_Astronomy_Satellite_3" title="Small Astronomy Satellite 3">53 (SAS-C)</a></li> <li><a href="/wiki/Explorer_54" title="Explorer 54">54 (AE-D)</a></li> <li><a href="/wiki/Explorer_55" title="Explorer 55">55 (AE-E)</a></li> <li><a href="/wiki/DADE-A" class="mw-redirect" title="DADE-A">DADE-A</a><sup>†</sup></li> <li><a href="/wiki/DADE-B" class="mw-redirect" title="DADE-B">DADE-B</a><sup>†</sup></li> <li><a href="/wiki/ISEE-1" title="ISEE-1">56 (ISEE-1)</a></li> <li><a href="/wiki/International_Ultraviolet_Explorer" title="International Ultraviolet Explorer">57 (IUE)</a></li> <li><a href="/wiki/Heat_Capacity_Mapping_Mission" title="Heat Capacity Mapping Mission">58 (HCMM)</a></li> <li><a href="/wiki/International_Cometary_Explorer" title="International Cometary Explorer">59 (ICE)</a></li> <li><a href="/wiki/Explorer_60" title="Explorer 60">60 (SAGE)</a></li> <li><a href="/wiki/Magsat" class="mw-redirect" title="Magsat">61 (Magsat)</a></li> <li><a href="/wiki/Dynamics_Explorer" title="Dynamics Explorer">62 (DE-1)</a></li> <li><a href="/wiki/Dynamics_Explorer" title="Dynamics Explorer">63 (DE-2)</a></li> <li><a href="/wiki/Solar_Mesosphere_Explorer" title="Solar Mesosphere Explorer">64 (SME)</a></li> <li><a href="/wiki/Charge_Composition_Explorer" class="mw-redirect" title="Charge Composition Explorer">65 (CCE)</a></li> <li><a href="/wiki/Cosmic_Background_Explorer" title="Cosmic Background Explorer">66 (COBE)</a></li> <li><a href="/wiki/Extreme_Ultraviolet_Explorer" title="Extreme Ultraviolet Explorer">67 (EUVE)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><abbr title="Medium-Class Explorers">MIDEX</abbr></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Rossi_X-ray_Timing_Explorer" title="Rossi X-ray Timing Explorer">69 (RXTE)</a></li> <li><a href="/wiki/Advanced_Composition_Explorer" title="Advanced Composition Explorer"><span class="tmp-color" style="color:darkgreen">71 (ACE)</span></a></li> <li><a href="/wiki/Far_Ultraviolet_Spectroscopic_Explorer" title="Far Ultraviolet Spectroscopic Explorer">77 (FUSE)</a></li> <li><a href="/wiki/IMAGE_(spacecraft)" title="IMAGE (spacecraft)">78 (IMAGE)</a></li> <li><a href="/wiki/Wilkinson_Microwave_Anisotropy_Probe" title="Wilkinson Microwave Anisotropy Probe">80 (WMAP)</a></li> <li><a href="/wiki/Full-sky_Astrometric_Mapping_Explorer" title="Full-sky Astrometric Mapping Explorer"><span class="tmp-color" style="color:grey">FAME</span></a></li> <li><a href="/wiki/Neil_Gehrels_Swift_Observatory" title="Neil Gehrels Swift Observatory"><span class="tmp-color" style="color:darkgreen">84 (Swift)</span></a></li> <li><a href="/wiki/THEMIS" title="THEMIS"><span class="tmp-color" style="color:darkgreen">85–89 (THEMIS)</span></a></li> <li><a href="/wiki/Wide-field_Infrared_Survey_Explorer" title="Wide-field Infrared Survey Explorer"><span class="tmp-color" style="color:darkgreen">92 (WISE)</span></a></li> <li><a href="/wiki/Transiting_Exoplanet_Survey_Satellite" title="Transiting Exoplanet Survey Satellite"><span class="tmp-color" style="color:darkgreen">95 (TESS)</span></a></li> <li><a href="/wiki/Ionospheric_Connection_Explorer" title="Ionospheric Connection Explorer"><span class="tmp-color" style="color:darkgreen">96 (ICON)</span></a></li> <li><i><a href="/wiki/SPHEREx" title="SPHEREx">SPHEREx</a></i></li> <li><i><a href="/wiki/Multi-slit_Solar_Explorer" title="Multi-slit Solar Explorer">MUSE</a></i></li> <li><i><a href="/wiki/HelioSwarm" title="HelioSwarm">HelioSwarm</a></i></li> <li><i><a href="/wiki/UVEX" title="UVEX">UVEX</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><a href="/wiki/Small_Explorer_program" class="mw-redirect" title="Small Explorer program">SMEX</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Solar_Anomalous_and_Magnetospheric_Particle_Explorer" title="Solar Anomalous and Magnetospheric Particle Explorer">68 (SAMPEX)</a></li> <li><a href="/wiki/Fast_Auroral_Snapshot_Explorer" class="mw-redirect" title="Fast Auroral Snapshot Explorer">70 (FAST)</a></li> <li><a href="/wiki/TRACE" title="TRACE">73 (TRACE)</a></li> <li><a href="/wiki/Submillimeter_Wave_Astronomy_Satellite" title="Submillimeter Wave Astronomy Satellite">74 (SWAS)</a></li> <li><a href="/wiki/Wide_Field_Infrared_Explorer" title="Wide Field Infrared Explorer">75 (WIRE)</a><sup>†</sup></li> <li><a href="/wiki/Reuven_Ramaty_High_Energy_Solar_Spectroscopic_Imager" title="Reuven Ramaty High Energy Solar Spectroscopic Imager">81 (RHESSI)</a></li> <li><a href="/wiki/GALEX" title="GALEX">83 (GALEX)</a></li> <li><a href="/wiki/Aeronomy_of_Ice_in_the_Mesosphere" title="Aeronomy of Ice in the Mesosphere"><span class="tmp-color" style="color:darkgreen">90 (AIM)</span></a></li> <li><a href="/wiki/Interstellar_Boundary_Explorer" title="Interstellar Boundary Explorer"><span class="tmp-color" style="color:darkgreen">91 (IBEX)</span></a></li> <li><a href="/wiki/NuSTAR" title="NuSTAR"><span class="tmp-color" style="color:darkgreen">93 (NuSTAR)</span></a></li> <li><a href="/wiki/Interface_Region_Imaging_Spectrograph" title="Interface Region Imaging Spectrograph"><span class="tmp-color" style="color:darkgreen">94 (IRIS)</span></a></li> <li><a href="/wiki/Gravity_and_Extreme_Magnetism" class="mw-redirect" title="Gravity and Extreme Magnetism"><span class="tmp-color" style="color:grey">GEMS</span></a></li> <li><a href="/wiki/Imaging_X-ray_Polarimetry_Explorer" class="mw-redirect" title="Imaging X-ray Polarimetry Explorer"><span class="tmp-color" style="color:darkgreen">97 (IXPE)</span></a></li> <li><i><a href="/wiki/Polarimeter_to_Unify_the_Corona_and_Heliosphere" title="Polarimeter to Unify the Corona and Heliosphere">PUNCH</a></i></li> <li><i><a href="/wiki/Tandem_Reconnection_and_Cusp_Electrodynamics_Reconnaissance_Satellites" title="Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites">TRACERS</a></i></li> <li><i><a href="/wiki/Compton_Spectrometer_and_Imager" title="Compton Spectrometer and Imager">COSI</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em"><abbr title="University-class Explorers">UNEX</abbr>/<abbr title="Missions of Opportunity">MO</abbr>/<abbr title="International Missions">I</abbr></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/High_Energy_Transient_Explorer" class="mw-redirect" title="High Energy Transient Explorer">HETE-1</a><sup>†</sup></li> <li><a href="/wiki/Student_Nitric_Oxide_Explorer" title="Student Nitric Oxide Explorer">72 (SNOE)</a></li> <li><a href="/wiki/TERRIERS" class="mw-redirect" title="TERRIERS">76 (TERRIERS)</a><sup>†</sup></li> <li><a href="/wiki/High_Energy_Transient_Explorer" class="mw-redirect" title="High Energy Transient Explorer">79 (HETE-2)</a></li> <li><a href="/wiki/INTEGRAL" title="INTEGRAL"><span class="tmp-color" style="color:darkgreen">INTEGRAL</span></a></li> <li><a href="/wiki/CHIPSat" class="mw-redirect" title="CHIPSat">82 (CHIPSat)</a></li> <li><a href="/wiki/CINDI" title="CINDI">CINDI</a></li> <li><a href="/wiki/Suzaku_(satellite)" title="Suzaku (satellite)">Suzaku</a></li> <li><a href="/wiki/TWINS" title="TWINS"><span class="tmp-color" style="color:darkgreen">TWINS</span></a></li> <li><a href="/wiki/Hitomi_(satellite)" title="Hitomi (satellite)">Hitomi</a><sup>†</sup></li> <li><a href="/wiki/Neutron_Star_Interior_Composition_Explorer" title="Neutron Star Interior Composition Explorer"><span class="tmp-color" style="color:darkgreen">NICER</span></a></li> <li><a href="/wiki/Global-scale_Observations_of_the_Limb_and_Disk" title="Global-scale Observations of the Limb and Disk"><span class="tmp-color" style="color:darkgreen">GOLD</span></a></li> <li><a href="/wiki/X-Ray_Imaging_and_Spectroscopy_Mission" title="X-Ray Imaging and Spectroscopy Mission"><span class="tmp-color" style="color:darkgreen">XRISM</span></a></li> <li><a href="/wiki/GUSTO_(telescope)" title="GUSTO (telescope)">GUSTO</a></li> <li><i><a href="/wiki/Atmospheric_Waves_Experiment" title="Atmospheric Waves Experiment">AWE</a></i></li> <li><i><a href="/wiki/Sun_Radio_Interferometer_Space_Experiment" title="Sun Radio Interferometer Space Experiment">SunRISE</a></i></li> <li><i><a href="/wiki/Electrojet_Zeeman_Imaging_Explorer" title="Electrojet Zeeman Imaging Explorer">EZIE</a></i></li> <li><i><a href="/wiki/Contribution_to_ARIEL_Spectroscopy_of_Exoplanets" title="Contribution to ARIEL Spectroscopy of Exoplanets">CASE</a></i></li></ul> </div></td></tr></tbody></table><div></div></td><td class="noviewer navbox-image" rowspan="2" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Transiting_Exoplanet_Survey_Satellite_artist_concept_(transparent_background).png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png/150px-Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png" decoding="async" width="150" height="106" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png/225px-Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png/300px-Transiting_Exoplanet_Survey_Satellite_artist_concept_%28transparent_background%29.png 2x" data-file-width="1200" data-file-height="850" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:5em">Proposals</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Proposals" scope="row" class="navbox-group" style="width:5em">Proposals</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fast_Infrared_Exoplanet_Spectroscopy_Survey_Explorer" title="Fast Infrared Exoplanet Spectroscopy Survey Explorer">FINESSE</a></li> <li><a href="/wiki/Arcus_(satellite)" title="Arcus (satellite)">Arcus</a></li> <li><a href="/wiki/Observatory_for_Heteroscale_Magnetosphere-Ionosphere_Coupling" title="Observatory for Heteroscale Magnetosphere-Ionosphere Coupling">OHMIC</a></li> <li><a href="/wiki/Atmosphere-Space_Transition_Region_Explorer" title="Atmosphere-Space Transition Region Explorer">ASTRE</a></li> <li><a href="/wiki/Exoplanetary_Circumstellar_Environments_and_Disk_Explorer" title="Exoplanetary Circumstellar Environments and Disk Explorer">EXCEDE</a></li> <li><a href="/wiki/Extreme-ultraviolet_Stellar_Characterization_for_Atmospheric_Physics_and_Evolution" title="Extreme-ultraviolet Stellar Characterization for Atmospheric Physics and Evolution">ESCAPE</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="tmp-color" style="color:darkgreen">Green titles</span> indicates active current missions</li> <li><span class="tmp-color" style="color:grey">Grey titles</span> indicates cancelled missions</li> <li><i>Italics</i> indicate missions yet to launch</li> <li>Symbol <sup>†</sup> indicates failure en route or before intended mission data returned</li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="←_1995Orbital_launches_in_19961997_→" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Orbital_launches_in_1996" title="Template:Orbital launches in 1996"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Orbital_launches_in_1996" title="Template talk:Orbital launches in 1996"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Orbital_launches_in_1996" title="Special:EditPage/Template:Orbital launches in 1996"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="←_1995Orbital_launches_in_19961997_→" style="font-size:114%;margin:0 4em"><div style="float: left;"><a href="/wiki/1995_in_spaceflight" title="1995 in spaceflight">← 1995</a></div><a href="/wiki/1996_in_spaceflight" title="1996 in spaceflight"><span class="vevent"><span class="summary">Orbital launches in <span class="dtstart">1996</span></span></span></a><div style="float: right;"><a href="/wiki/1997_in_spaceflight" title="1997 in spaceflight">1997 →</a></div></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">January</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><u><a href="/wiki/STS-72" title="STS-72">STS-72</a></u> (<a href="/w/index.php?title=SPARTAN-206&action=edit&redlink=1" class="new" title="SPARTAN-206 (page does not exist)">SPARTAN-206</a>)</li> <li><a href="/wiki/Intelsat_3R" title="Intelsat 3R">PAS-3R</a>, <a href="/w/index.php?title=Africasat-1&action=edit&redlink=1" class="new" title="Africasat-1 (page does not exist)">MEASAT-1</a></li> <li><a href="/w/index.php?title=ABS-1A&action=edit&redlink=1" class="new" title="ABS-1A (page does not exist)">Koreasat 2</a></li> <li><a href="/w/index.php?title=Kosmos_2327&action=edit&redlink=1" class="new" title="Kosmos 2327 (page does not exist)">Kosmos 2327</a></li> <li><a href="/w/index.php?title=Gorizont_No.43L&action=edit&redlink=1" class="new" title="Gorizont No.43L (page does not exist)">Gorizont #43L</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">February</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Paksat-1" title="Paksat-1">Palapa C1</a></li> <li><a href="/wiki/N-STAR_b" title="N-STAR b">N-STAR b</a></li> <li><i><a href="/wiki/Intelsat_708" title="Intelsat 708">Intelsat 708</a></i></li> <li><a href="/wiki/NEAR_Shoemaker" title="NEAR Shoemaker">NEAR Shoemaker</a></li> <li><a href="/w/index.php?title=Kosmos_2328&action=edit&redlink=1" class="new" title="Kosmos 2328 (page does not exist)">Kosmos 2328</a>, <a href="/w/index.php?title=Kosmos_2329&action=edit&redlink=1" class="new" title="Kosmos 2329 (page does not exist)">Kosmos 2329</a>, <a href="/w/index.php?title=Kosmos_2330&action=edit&redlink=1" class="new" title="Kosmos 2330 (page does not exist)">Kosmos 2330</a>, <a href="/w/index.php?title=Gonets-D1_No.1&action=edit&redlink=1" class="new" title="Gonets-D1 No.1 (page does not exist)">Gonets-D1 #1</a>, <a href="/w/index.php?title=Gonets-D1_No.2&action=edit&redlink=1" class="new" title="Gonets-D1 No.2 (page does not exist)">Gonets-D1 #2</a>, <a href="/w/index.php?title=Gonets-D1_No.3&action=edit&redlink=1" class="new" title="Gonets-D1 No.3 (page does not exist)">Gonets-D1 #3</a></li> <li><a href="/w/index.php?title=Gran%27_No.44L&action=edit&redlink=1" class="new" title="Gran' No.44L (page does not exist)">Gran' #44L</a></li> <li><u><a href="/wiki/Soyuz_TM-23" title="Soyuz TM-23">Soyuz TM-23</a></u></li> <li><u><a href="/wiki/STS-75" title="STS-75">STS-75</a></u> (<a href="/w/index.php?title=TSS-1R&action=edit&redlink=1" class="new" title="TSS-1R (page does not exist)">TSS-1R</a>)</li> <li><a href="/wiki/Polar_(satellite)" title="Polar (satellite)">Polar</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">March</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=REX_II&action=edit&redlink=1" class="new" title="REX II (page does not exist)">REX II</a></li> <li><a href="/wiki/Intelsat_707" title="Intelsat 707">Intelsat 707</a></li> <li><a href="/w/index.php?title=Kosmos_2331&action=edit&redlink=1" class="new" title="Kosmos 2331 (page does not exist)">Kosmos 2331</a></li> <li><a href="/wiki/IRS-P3" title="IRS-P3">IRS-P3</a></li> <li><u><a href="/wiki/STS-76" title="STS-76">STS-76</a></u></li> <li><a href="/wiki/USA-117" title="USA-117">USA-117</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">April</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Inmarsat-3_F1&action=edit&redlink=1" class="new" title="Inmarsat-3 F1 (page does not exist)">Inmarsat-3 F1</a></li> <li><a href="/wiki/Astra_1F" title="Astra 1F">Astra 1F</a></li> <li><a href="/wiki/MSAT-1" class="mw-redirect" title="MSAT-1">MSAT-1</a></li> <li><a href="/wiki/Priroda" title="Priroda">Priroda</a></li> <li><a href="/wiki/Midcourse_Space_Experiment" title="Midcourse Space Experiment">MSX</a></li> <li><a href="/w/index.php?title=Kosmos_2332&action=edit&redlink=1" class="new" title="Kosmos 2332 (page does not exist)">Kosmos 2332</a></li> <li><a href="/w/index.php?title=USA-118&action=edit&redlink=1" class="new" title="USA-118 (page does not exist)">USA-118</a></li> <li><a href="/wiki/BeppoSAX" title="BeppoSAX">BeppoSAX</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">May</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Progress_M-31" title="Progress M-31">Progress M-31</a></li> <li><a href="/w/index.php?title=USA-119&action=edit&redlink=1" class="new" title="USA-119 (page does not exist)">USA-119</a>, <a href="/w/index.php?title=USA-120&action=edit&redlink=1" class="new" title="USA-120 (page does not exist)">USA-120</a>, <a href="/w/index.php?title=USA-121&action=edit&redlink=1" class="new" title="USA-121 (page does not exist)">USA-121</a>, <a href="/w/index.php?title=USA-122&action=edit&redlink=1" class="new" title="USA-122 (page does not exist)">USA-122</a>, <a href="/w/index.php?title=USA-123&action=edit&redlink=1" class="new" title="USA-123 (page does not exist)">USA-123</a>, <a href="/w/index.php?title=USA-124&action=edit&redlink=1" class="new" title="USA-124 (page does not exist)">USA-124</a></li> <li><i><a href="/w/index.php?title=Kometa_No.18&action=edit&redlink=1" class="new" title="Kometa No.18 (page does not exist)">Kometa #18</a></i></li> <li><a href="/wiki/Palapa_C2" class="mw-redirect" title="Palapa C2">Palapa C2</a>, <a href="/wiki/Intelsat_24" class="mw-redirect" title="Intelsat 24">Amos-1</a></li> <li><a href="/wiki/MSTI-3" class="mw-redirect" title="MSTI-3">MSTI-3</a></li> <li><u><a href="/wiki/STS-77" title="STS-77">STS-77</a></u> (<a href="/w/index.php?title=SPARTAN-207&action=edit&redlink=1" class="new" title="SPARTAN-207 (page does not exist)">SPARTAN-207</a>, <a href="/wiki/Inflatable_Antenna_Experiment" title="Inflatable Antenna Experiment">IAE</a>, <a href="/w/index.php?title=PAMS-STU&action=edit&redlink=1" class="new" title="PAMS-STU (page does not exist)">PAMS-STU</a>)</li> <li><a href="/wiki/Galaxy_9" title="Galaxy 9">Galaxy 9</a></li> <li><a href="/w/index.php?title=Gorizont_No.44L&action=edit&redlink=1" class="new" title="Gorizont No.44L (page does not exist)">Gorizont #44L</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">June</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/w/index.php?title=Cluster_F1&action=edit&redlink=1" class="new" title="Cluster F1 (page does not exist)">Cluster F1</a>, <a href="/w/index.php?title=Cluster_F2&action=edit&redlink=1" class="new" title="Cluster F2 (page does not exist)">Cluster F2</a>, <a href="/w/index.php?title=Cluster_F3&action=edit&redlink=1" class="new" title="Cluster F3 (page does not exist)">Cluster F3</a>, <a href="/w/index.php?title=Cluster_F4&action=edit&redlink=1" class="new" title="Cluster F4 (page does not exist)">Cluster F4</a></i></li> <li><a href="/wiki/Intelsat_709" title="Intelsat 709">Intelsat 709</a></li> <li><u><a href="/wiki/STS-78" title="STS-78">STS-78</a></u></li> <li><i><a href="/w/index.php?title=June_1996_Soyuz_launch_failure&action=edit&redlink=1" class="new" title="June 1996 Soyuz launch failure (page does not exist)">Kobal't</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">July</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/TOMS-EP" class="mw-redirect" title="TOMS-EP">TOMS-EP</a></li> <li><a href="/w/index.php?title=USA-125&action=edit&redlink=1" class="new" title="USA-125 (page does not exist)">USA-125</a></li> <li><a href="/wiki/Apstar_1A" class="mw-redirect" title="Apstar 1A">Apstar 1A</a></li> <li><a href="/w/index.php?title=Arabsat_2A&action=edit&redlink=1" class="new" title="Arabsat 2A (page does not exist)">Arabsat 2A</a>, <a href="/wiki/T%C3%BCrksat_1C" title="Türksat 1C">Türksat 1C</a></li> <li><a href="/wiki/USA-126" title="USA-126">USA-126</a></li> <li><a href="/w/index.php?title=USA-127&action=edit&redlink=1" class="new" title="USA-127 (page does not exist)">USA-127</a></li> <li><a href="/wiki/Progress_M-32" title="Progress M-32">Progress M-32</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">August</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=T%C3%A9l%C3%A9com_2D&action=edit&redlink=1" class="new" title="Télécom 2D (page does not exist)">Télécom 2D</a>, <a href="/w/index.php?title=Italsat_2&action=edit&redlink=1" class="new" title="Italsat 2 (page does not exist)">Italsat 2</a></li> <li><a href="/w/index.php?title=Molniya_1-79&action=edit&redlink=1" class="new" title="Molniya 1-79 (page does not exist)">Molniya 1-79</a></li> <li><a href="/w/index.php?title=Midori_(satellite)&action=edit&redlink=1" class="new" title="Midori (satellite) (page does not exist)">Midori</a>, <a href="/w/index.php?title=Fuji_2&action=edit&redlink=1" class="new" title="Fuji 2 (page does not exist)">Fuji 2</a></li> <li><u><a href="/wiki/Soyuz_TM-24" title="Soyuz TM-24">Soyuz TM-24</a></u></li> <li><a href="/w/index.php?title=HGS-2&action=edit&redlink=1" class="new" title="HGS-2 (page does not exist)">Chinasat-7</a></li> <li><a href="/wiki/Fast_Auroral_Snapshot_Explorer" class="mw-redirect" title="Fast Auroral Snapshot Explorer">FAST</a></li> <li><a href="/w/index.php?title=Interbol_2&action=edit&redlink=1" class="new" title="Interbol 2 (page does not exist)">Interbol 2</a>, <a href="/w/index.php?title=Maigon_5&action=edit&redlink=1" class="new" title="Maigon 5 (page does not exist)">Maigon 5</a>, <a href="/w/index.php?title=Victor_(satellite)&action=edit&redlink=1" class="new" title="Victor (satellite) (page does not exist)">Victor</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">September</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Kosmos_2333&action=edit&redlink=1" class="new" title="Kosmos 2333 (page does not exist)">Kosmos 2333</a></li> <li><a href="/w/index.php?title=Kosmos_2334&action=edit&redlink=1" class="new" title="Kosmos 2334 (page does not exist)">Kosmos 2334</a>, <a href="/w/index.php?title=UNAMSAT-2&action=edit&redlink=1" class="new" title="UNAMSAT-2 (page does not exist)">UNAMSAT-2</a></li> <li><a href="/w/index.php?title=Inmarsat-3_F2&action=edit&redlink=1" class="new" title="Inmarsat-3 F2 (page does not exist)">Inmarsat-3 F2</a></li> <li><a href="/wiki/AMC-1" title="AMC-1">GE-1</a></li> <li><a href="/wiki/EchoStar_II" title="EchoStar II">EchoStar II</a></li> <li><a href="/wiki/USA-128" title="USA-128">USA-128</a></li> <li><u><a href="/wiki/STS-79" title="STS-79">STS-79</a></u></li> <li><a href="/w/index.php?title=Ekspress-6&action=edit&redlink=1" class="new" title="Ekspress-6 (page does not exist)">Ekspress-6</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">October</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fanhui_Shi_Weixing" title="Fanhui Shi Weixing">FSW-17</a></li> <li><a href="/w/index.php?title=Molniya_3-62&action=edit&redlink=1" class="new" title="Molniya 3-62 (page does not exist)">Molniya 3-62</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">November</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/High_Energy_Transient_Explorer" class="mw-redirect" title="High Energy Transient Explorer">HETE</a>, <a href="/w/index.php?title=SAC-B&action=edit&redlink=1" class="new" title="SAC-B (page does not exist)">SAC-B</a></li> <li><a href="/wiki/Mars_Global_Surveyor" title="Mars Global Surveyor">Mars Global Surveyor</a></li> <li><a href="/w/index.php?title=Arabsat_2B&action=edit&redlink=1" class="new" title="Arabsat 2B (page does not exist)">Arabsat 2B</a>, <a href="/w/index.php?title=Africasat_2&action=edit&redlink=1" class="new" title="Africasat 2 (page does not exist)">MEASAT-2</a></li> <li><a href="/wiki/Mars_96" title="Mars 96">Mars 96</a></li> <li><u><a href="/wiki/STS-80" title="STS-80">STS-80</a></u> (<a href="/wiki/Wake_Shield_Facility" title="Wake Shield Facility">WSF</a>, <a href="/w/index.php?title=ORFEUS-SPAS&action=edit&redlink=1" class="new" title="ORFEUS-SPAS (page does not exist)">ORFEUS-SPAS</a>)</li> <li><a href="/wiki/Progress_M-33" title="Progress M-33">Progress M-33</a></li> <li><a href="/w/index.php?title=Eutelsat_W48&action=edit&redlink=1" class="new" title="Eutelsat W48 (page does not exist)">Hot Bird 2</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">December</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Mars_Pathfinder" title="Mars Pathfinder">Mars Pathfinder</a> (<a href="/wiki/Sojourner_(rover)" title="Sojourner (rover)">Sojourner</a>)</li> <li><a href="/w/index.php?title=Kosmos_2335&action=edit&redlink=1" class="new" title="Kosmos 2335 (page does not exist)">Kosmos 2335</a></li> <li><a href="/w/index.php?title=Inmarsat-3_F3&action=edit&redlink=1" class="new" title="Inmarsat-3 F3 (page does not exist)">Inmarsat-3 F3</a></li> <li><a href="/w/index.php?title=Kosmos_2336&action=edit&redlink=1" class="new" title="Kosmos 2336 (page does not exist)">Kosmos 2336</a></li> <li><a href="/w/index.php?title=USA-129&action=edit&redlink=1" class="new" title="USA-129 (page does not exist)">USA-129</a></li> <li><a href="/wiki/Bion_No.11" class="mw-redirect" title="Bion No.11">Bion No.11</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div>Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ).<br /><u>Crewed flights</u> are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).</div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=High_Energy_Transient_Explorer_1&oldid=1147593651">https://en.wikipedia.org/w/index.php?title=High_Energy_Transient_Explorer_1&oldid=1147593651</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Gamma-ray_telescopes" title="Category:Gamma-ray telescopes">Gamma-ray telescopes</a></li><li><a href="/wiki/Category:X-ray_telescopes" title="Category:X-ray telescopes">X-ray telescopes</a></li><li><a href="/wiki/Category:Space_telescopes" title="Category:Space telescopes">Space telescopes</a></li><li><a href="/wiki/Category:Satellites_orbiting_Earth" title="Category:Satellites orbiting Earth">Satellites orbiting Earth</a></li><li><a href="/wiki/Category:Spacecraft_launched_in_1996" title="Category:Spacecraft launched in 1996">Spacecraft launched in 1996</a></li><li><a href="/wiki/Category:Spacecraft_launched_in_2000" title="Category:Spacecraft launched in 2000">Spacecraft launched in 2000</a></li><li><a href="/wiki/Category:Spacecraft_launched_by_Pegasus_rockets" title="Category:Spacecraft launched by Pegasus rockets">Spacecraft launched by Pegasus rockets</a></li><li><a href="/wiki/Category:Explorers_Program" title="Category:Explorers Program">Explorers Program</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Source_attribution" title="Category:Source attribution">Source attribution</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_is_different_from_Wikidata" title="Category:Short description is different from Wikidata">Short description is different from Wikidata</a></li><li><a href="/wiki/Category:Use_American_English_from_December_2021" title="Category:Use American English from December 2021">Use American English from December 2021</a></li><li><a href="/wiki/Category:All_Wikipedia_articles_written_in_American_English" title="Category:All Wikipedia articles written in American English">All Wikipedia articles written in American English</a></li><li><a href="/wiki/Category:Use_dmy_dates_from_December_2021" title="Category:Use dmy dates from December 2021">Use dmy dates from December 2021</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 31 March 2023, at 23:47<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=High_Energy_Transient_Explorer_1&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-f69cdc8f6-w24zn","wgBackendResponseTime":187,"wgPageParseReport":{"limitreport":{"cputime":"0.544","walltime":"0.875","ppvisitednodes":{"value":4302,"limit":1000000},"postexpandincludesize":{"value":200203,"limit":2097152},"templateargumentsize":{"value":9004,"limit":2097152},"expansiondepth":{"value":12,"limit":100},"expensivefunctioncount":{"value":6,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":58897,"limit":5000000},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 707.519 1 -total"," 38.90% 275.194 6 Template:Navbox"," 30.17% 213.433 6 Template:Infobox"," 25.47% 180.230 1 Template:Space_observatories"," 20.88% 147.726 1 Template:Infobox_spaceflight"," 19.90% 140.830 1 Template:Reflist"," 15.62% 110.525 1 Template:Short_description"," 14.80% 104.720 6 Template:Cite_web"," 8.07% 57.063 1 Template:Icon"," 7.78% 55.011 2 Template:Pagetype"]},"scribunto":{"limitreport-timeusage":{"value":"0.264","limit":"10.000"},"limitreport-memusage":{"value":6775254,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.main-5dc468848-6gcs4","timestamp":"20241122144702","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"High Energy Transient Explorer 1","url":"https:\/\/en.wikipedia.org\/wiki\/High_Energy_Transient_Explorer_1","sameAs":"http:\/\/www.wikidata.org\/entity\/Q967483","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q967483","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2003-10-03T01:28:52Z","dateModified":"2023-03-31T23:47:39Z","headline":"space observatory"}</script> </body> </html>