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id="toc-Physical_characteristics-sublist" class="vector-toc-list"> <li id="toc-Rotation" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Rotation"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Rotation</span> </div> </a> <ul id="toc-Rotation-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Orbit" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Orbit"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Orbit</span> </div> </a> <ul id="toc-Orbit-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Exploration" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Exploration"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Exploration</span> </div> </a> <ul id="toc-Exploration-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-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> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>External links</span> </div> </a> <ul id="toc-External_links-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">Nix (moon)</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 67 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-67" 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">67 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Nix_(maan)" title="Nix (maan) – Afrikaans" lang="af" hreflang="af" data-title="Nix (maan)" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Nix_(Mond)" title="Nix (Mond) – Alemannic" lang="gsw" hreflang="gsw" data-title="Nix (Mond)" data-language-autonym="Alemannisch" data-language-local-name="Alemannic" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D9%8A%D9%83%D8%B3" title="نيكس – Arabic" lang="ar" hreflang="ar" data-title="نيكس" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Nicte_(satelite)" title="Nicte (satelite) – Aragonese" lang="an" hreflang="an" data-title="Nicte (satelite)" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%86%DB%8C%DA%A9%D8%B3_(%D8%A7%D9%88%DB%8C%D8%AF%D9%88)" title="نیکس (اویدو) – South Azerbaijani" lang="azb" hreflang="azb" data-title="نیکس (اویدو)" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Nix_(o%C4%93-chhe%E2%81%BF)" title="Nix (oē-chheⁿ) – Minnan" lang="nan" hreflang="nan" data-title="Nix (oē-chheⁿ)" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9D%D1%96%D0%BA%D1%81_(%D1%81%D0%BF%D0%B0%D0%B4%D0%B0%D1%80%D0%BE%D0%B6%D0%BD%D1%96%D0%BA_%D0%9F%D0%BB%D1%83%D1%82%D0%BE%D0%BD%D0%B0)" title="Нікс (спадарожнік Плутона) – Belarusian" lang="be" hreflang="be" data-title="Нікс (спадарожнік Плутона)" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9D%D1%96%D0%BA%D1%81_(%D1%81%D0%BF%D0%B0%D0%B4%D0%B0%D1%80%D0%BE%D0%B6%D0%BD%D1%96%D0%BA)" title="Нікс (спадарожнік) – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Нікс (спадарожнік)" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9D%D0%B8%D0%BA%D1%82%D0%B0_(%D1%81%D0%BF%D1%8A%D1%82%D0%BD%D0%B8%D0%BA)" title="Никта (спътник) – Bulgarian" lang="bg" hreflang="bg" data-title="Никта (спътник)" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Nix" title="Nix – Breton" lang="br" hreflang="br" data-title="Nix" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Nix_(sat%C3%A8l%C2%B7lit)" title="Nix (satèl·lit) – Catalan" lang="ca" hreflang="ca" data-title="Nix (satèl·lit)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Nix_(m%C4%9Bs%C3%ADc)" title="Nix (měsíc) – Czech" lang="cs" hreflang="cs" data-title="Nix (měsíc)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Nix_(lloeren)" title="Nix (lloeren) – Welsh" lang="cy" hreflang="cy" data-title="Nix (lloeren)" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Nix" title="Nix – Danish" lang="da" hreflang="da" data-title="Nix" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Nix_(Mond)" title="Nix (Mond) – German" lang="de" hreflang="de" data-title="Nix (Mond)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Nix" title="Nix – Estonian" lang="et" hreflang="et" data-title="Nix" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9D%CF%8D%CF%87%CF%84%CE%B1_(%CE%B4%CE%BF%CF%81%CF%85%CF%86%CF%8C%CF%81%CE%BF%CF%82)" title="Νύχτα (δορυφόρος) – Greek" lang="el" hreflang="el" data-title="Νύχτα (δορυφόρος)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Nix_(sat%C3%A9lite)" title="Nix (satélite) – Spanish" lang="es" hreflang="es" data-title="Nix (satélite)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Nikso_(luno)" title="Nikso (luno) – Esperanto" lang="eo" hreflang="eo" data-title="Nikso (luno)" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Nix_(satelitea)" title="Nix (satelitea) – Basque" lang="eu" hreflang="eu" data-title="Nix (satelitea)" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%86%DB%8C%DA%A9%D8%B3_(%D9%82%D9%85%D8%B1)" title="نیکس (قمر) – Persian" lang="fa" hreflang="fa" data-title="نیکس (قمر)" 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/Nix_(lune)" title="Nix (lune) – French" lang="fr" hreflang="fr" data-title="Nix (lune)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Nix" title="Nix – Irish" lang="ga" hreflang="ga" data-title="Nix" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Nix_(eayst)" title="Nix (eayst) – Manx" lang="gv" hreflang="gv" data-title="Nix (eayst)" data-language-autonym="Gaelg" data-language-local-name="Manx" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Nix_(l%C3%BAa)" title="Nix (lúa) – Galician" lang="gl" hreflang="gl" data-title="Nix (lúa)" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%8B%89%EC%8A%A4_(%EC%9C%84%EC%84%B1)" title="닉스 (위성) – Korean" lang="ko" hreflang="ko" data-title="닉스 (위성)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%86%D5%AB%D6%84%D5%BD_(%D5%A1%D6%80%D5%A2%D5%A1%D5%B6%D5%B5%D5%A1%D5%AF)" title="Նիքս (արբանյակ) – Armenian" lang="hy" hreflang="hy" data-title="Նիքս (արբանյակ)" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A8%E0%A4%BF%E0%A4%95%E0%A5%8D%E0%A4%B8_(%E0%A4%89%E0%A4%AA%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9)" title="निक्स (उपग्रह) – Hindi" lang="hi" hreflang="hi" data-title="निक्स (उपग्रह)" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Nikta_(mjesec)" title="Nikta (mjesec) – Croatian" lang="hr" hreflang="hr" data-title="Nikta (mjesec)" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Nikso" title="Nikso – Ido" lang="io" hreflang="io" data-title="Nikso" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Nix_(satelit)" title="Nix (satelit) – Indonesian" lang="id" hreflang="id" data-title="Nix (satelit)" 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/Notte_(astronomia)" title="Notte (astronomia) – Italian" lang="it" hreflang="it" data-title="Notte (astronomia)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A0%D7%99%D7%A7%D7%A1_(%D7%99%D7%A8%D7%97)" title="ניקס (ירח) – Hebrew" lang="he" hreflang="he" data-title="ניקס (ירח)" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%9D%D0%B8%D0%BA%D1%82%D0%B0_(%D1%82%D3%A7%D0%BB%D1%8B%D1%81%D1%8C)" title="Никта (тӧлысь) – Komi" lang="kv" hreflang="kv" data-title="Никта (тӧлысь)" data-language-autonym="Коми" data-language-local-name="Komi" class="interlanguage-link-target"><span>Коми</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Nix_(satelles)" title="Nix (satelles) – Latin" lang="la" hreflang="la" data-title="Nix (satelles)" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Nikte_(pavadonis)" title="Nikte (pavadonis) – Latvian" lang="lv" hreflang="lv" data-title="Nikte (pavadonis)" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Nikt%C4%97_(palydovas)" title="Niktė (palydovas) – Lithuanian" lang="lt" hreflang="lt" data-title="Niktė (palydovas)" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Nix_(hold)" title="Nix (hold) – Hungarian" lang="hu" hreflang="hu" data-title="Nix (hold)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9D%D0%B8%D0%BA%D1%82%D0%B0_(%D0%BC%D0%B5%D1%81%D0%B5%D1%87%D0%B8%D0%BD%D0%B0)" title="Никта (месечина) – Macedonian" lang="mk" hreflang="mk" data-title="Никта (месечина)" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%A8%E0%A4%BF%E0%A4%95%E0%A5%8D%E0%A4%B8_(%E0%A4%89%E0%A4%AA%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9)" title="निक्स (उपग्रह) – Marathi" lang="mr" hreflang="mr" data-title="निक्स (उपग्रह)" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%94%E1%80%85%E1%80%BA%E1%80%81%E1%80%BA_(%E1%80%82%E1%80%BC%E1%80%AD%E1%80%AF%E1%80%9F%E1%80%BA%E1%80%9B%E1%80%B6%E1%80%9C)" title="နစ်ခ် (ဂြိုဟ်ရံလ) – Burmese" lang="my" hreflang="my" data-title="နစ်ခ် (ဂြိုဟ်ရံလ)" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Nix_(maan)" title="Nix (maan) – Dutch" lang="nl" hreflang="nl" data-title="Nix (maan)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%8B%E3%82%AF%E3%82%B9_(%E8%A1%9B%E6%98%9F)" title="ニクス (衛星) – Japanese" lang="ja" hreflang="ja" data-title="ニクス (衛星)" 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-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Nix_(m%C3%A5ne)" title="Nix (måne) – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Nix (måne)" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Nix" title="Nix – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Nix" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Nix_(Maand)" title="Nix (Maand) – Low German" lang="nds" hreflang="nds" data-title="Nix (Maand)" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Nix_(ksi%C4%99%C5%BCyc)" title="Nix (księżyc) – Polish" lang="pl" hreflang="pl" data-title="Nix (księżyc)" 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/Nix_(sat%C3%A9lite)" title="Nix (satélite) – Portuguese" lang="pt" hreflang="pt" data-title="Nix (satélite)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Nix_(satelit)" title="Nix (satelit) – Romanian" lang="ro" hreflang="ro" data-title="Nix (satelit)" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9D%D0%B8%D0%BA%D1%82%D0%B0_(%D1%81%D0%BF%D1%83%D1%82%D0%BD%D0%B8%D0%BA)" title="Никта (спутник) – Russian" lang="ru" hreflang="ru" data-title="Никта (спутник)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Nix" title="Nix – Sicilian" lang="scn" hreflang="scn" data-title="Nix" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Nix_(moon)" title="Nix (moon) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Nix (moon)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Nix_(mesiac)" title="Nix (mesiac) – Slovak" lang="sk" hreflang="sk" data-title="Nix (mesiac)" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Niks_(luna)" title="Niks (luna) – Slovenian" lang="sl" hreflang="sl" data-title="Niks (luna)" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%86%DB%8C%DA%A9%D8%B3" title="نیکس – Central Kurdish" lang="ckb" hreflang="ckb" data-title="نیکس" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9D%D0%B8%D0%BA%D1%82%D0%B0_(%D0%BC%D0%B5%D1%81%D0%B5%D1%86)" title="Никта (месец) – Serbian" lang="sr" hreflang="sr" data-title="Никта (месец)" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Nix_(mesec)" title="Nix (mesec) – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Nix (mesec)" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Nix" title="Nix – Finnish" lang="fi" hreflang="fi" data-title="Nix" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Nix_(m%C3%A5ne)" title="Nix (måne) – Swedish" lang="sv" hreflang="sv" data-title="Nix (måne)" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%99%E0%B8%B4%E0%B8%81%E0%B8%8B%E0%B9%8C_(%E0%B8%94%E0%B8%B2%E0%B8%A7%E0%B8%9A%E0%B8%A3%E0%B8%B4%E0%B8%A7%E0%B8%B2%E0%B8%A3)" title="นิกซ์ (ดาวบริวาร) – Thai" lang="th" hreflang="th" data-title="นิกซ์ (ดาวบริวาร)" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Nix_(uydu)" title="Nix (uydu) – Turkish" lang="tr" hreflang="tr" data-title="Nix (uydu)" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9D%D1%96%D0%BA%D1%82%D0%B0_(%D1%81%D1%83%D0%BF%D1%83%D1%82%D0%BD%D0%B8%D0%BA)" title="Нікта (супутник) – Ukrainian" lang="uk" hreflang="uk" data-title="Нікта (супутник)" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Nix_(v%E1%BB%87_tinh)" title="Nix (vệ tinh) – Vietnamese" lang="vi" hreflang="vi" data-title="Nix (vệ tinh)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Nix_(bulan)" title="Nix (bulan) – Waray" lang="war" hreflang="war" data-title="Nix (bulan)" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%86%A5%E5%8D%AB%E4%BA%8C" title="冥卫二 – Wu" lang="wuu" hreflang="wuu" data-title="冥卫二" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%86%A5%E8%A1%9E%E4%BA%8C" title="冥衞二 – Cantonese" lang="yue" hreflang="yue" data-title="冥衞二" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a 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id="mw-indicator-good-star" class="mw-indicator"><div class="mw-parser-output"><span typeof="mw:File"><a href="/wiki/Wikipedia:Good_articles*" title="This is a good article. Click here for more information."><img alt="This is a good article. Click here for more information." src="//upload.wikimedia.org/wikipedia/en/thumb/9/94/Symbol_support_vote.svg/19px-Symbol_support_vote.svg.png" decoding="async" width="19" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/94/Symbol_support_vote.svg/29px-Symbol_support_vote.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/94/Symbol_support_vote.svg/39px-Symbol_support_vote.svg.png 2x" data-file-width="180" data-file-height="185" /></a></span></div></div> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></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">Moon of Pluto</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about the moon of Pluto. Not to be confused with the asteroid <a href="/wiki/3908_Nyx" title="3908 Nyx">3908 Nyx</a>.</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><table class="infobox"><caption class="infobox-title fn org">Nix</caption><tbody><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Nix_best_view.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Nix_best_view.jpg/290px-Nix_best_view.jpg" decoding="async" width="290" height="290" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/5/51/Nix_best_view.jpg 1.5x" data-file-width="336" data-file-height="336" /></a></span><div class="infobox-caption">Enhanced color image of Nix, taken by <i><a href="/wiki/New_Horizons" title="New Horizons">New Horizons</a></i></div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Discovery<sup id="cite_ref-Nomenclature_1-0" class="reference"><a href="#cite_note-Nomenclature-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/List_of_minor_planet_discoverers" title="List of minor planet discoverers">Discovered by</a></th><td class="infobox-data"><a href="/wiki/Hal_A._Weaver" title="Hal A. Weaver">Hal A. Weaver</a> et al.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;">Discovery date</th><td class="infobox-data">15 May 2005</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Designations</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Designation</div></th><td class="infobox-data">Pluto II<sup id="cite_ref-Nomenclature_1-2" class="reference"><a href="#cite_note-Nomenclature-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;">Pronunciation</th><td class="infobox-data"><span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ˈ/: primary stress follows">ˈ</span><span title="'n' in 'nigh'">n</span><span title="/ɪ/: 'i' in 'kit'">ɪ</span><span title="'k' in 'kind'">k</span><span title="'s' in 'sigh'">s</span></span>/</a></span></span></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Named after</div></th><td class="infobox-data"><a href="/wiki/Nyx_(mythology)" class="mw-redirect" title="Nyx (mythology)">Nyx</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Provisional_designation_in_astronomy" title="Provisional designation in astronomy">Alternative names</a></div></th><td class="infobox-data">S/2005 P 2</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/List_of_adjectivals_and_demonyms_of_astronomical_bodies" title="List of adjectivals and demonyms of astronomical bodies">Adjectives</a></th><td class="infobox-data">Nictian (<span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ˈ/: primary stress follows">ˈ</span><span title="'n' in 'nigh'">n</span><span title="/ɪ/: 'i' in 'kit'">ɪ</span><span title="'k' in 'kind'">k</span><span title="'t' in 'tie'">t</span><span title="/i/: 'y' in 'happy'">i</span><span title="/ən/: 'on' in 'button'">ən</span></span>/</a></span></span>)</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF"><a href="/wiki/Osculating_orbit" title="Osculating orbit">Orbital characteristics</a><sup id="cite_ref-ShowalterHamilton2015_3-0" class="reference"><a href="#cite_note-ShowalterHamilton2015-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Semi-major_and_semi-minor_axes" title="Semi-major and semi-minor axes">Semi-major axis</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7007486940000000000♠"></span>48<span style="margin-left:.25em;">694</span><span style="margin-left:0.3em;margin-right:0.15em;">±</span>3 km</span></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">Eccentricity</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="6997203600000000000♠"></span>0.002<span style="margin-left:.25em;">036</span><span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.000<span style="margin-left:.25em;">050</span></span></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Orbital_period" title="Orbital period">Orbital period (sidereal)</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7006214744003200000♠"></span>24.854<span style="margin-left:.25em;">63</span><span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.000<span style="margin-left:.25em;">03</span> d</span></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Orbital_inclination" title="Orbital inclination">Inclination</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="6997232128790515246♠"></span>0.133°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.008°</span> (<span class="nowrap"><span data-sort-value="7000213855193246865♠"></span>122.53°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.008°</span> to Pluto's orbit)</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Natural_satellite" title="Natural satellite">Satellite of</a></th><td class="infobox-data"><a href="/wiki/Pluto" title="Pluto">Pluto</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF"><span class="anchor" id="Infobox_Physical_characteristics"></span>Physical characteristics</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Mean_radius_(astronomy)" title="Mean radius (astronomy)">Dimensions</a></th><td class="infobox-data"><span class="nowrap">49.8 × 33.2 × 31.1 km</span><sup id="cite_ref-phasecurves_4-0" class="reference"><a href="#cite_note-phasecurves-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><br />(<a href="/wiki/Geometric_mean" title="Geometric mean">Geometric mean</a> of 37 km)</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Mass" title="Mass">Mass</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7016260000000000000♠"></span>(2.60<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.52)<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>16</sup> kg</span><sup id="cite_ref-Porter2023_5-0" class="reference"><a href="#cite_note-Porter2023-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 10">: 10 </span></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Mean <a href="/wiki/Density" title="Density">density</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7003103100000000000♠"></span>1.031<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.204 g/cm<sup>3</sup></span><sup id="cite_ref-Porter2023_5-1" class="reference"><a href="#cite_note-Porter2023-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 10">: 10 </span></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Surface_gravity" title="Surface gravity">Surface gravity</a></div></th><td class="infobox-data">≈ 0.0028 m/s<sup>2</sup> at longest axis<br />to ≈ 0.0072 m/s<sup>2</sup> at poles</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Escape_velocity" title="Escape velocity">Escape velocity</a></div></th><td class="infobox-data">≈ 0.0118 km/s at longest axis<br />to ≈ 0.0149 km/s at poles</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Synodic_rotation_period" class="mw-redirect" title="Synodic rotation period">Synodic rotation period</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7005158025600000000♠"></span>1.829<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.009 d</span><sup id="cite_ref-Weaver2016_6-0" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 3">: 3 </span></sup> chaotic<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> (decreased by 10% between discovery and flyby)<sup id="cite_ref-Lakdawalla1110_8-0" class="reference"><a href="#cite_note-Lakdawalla1110-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Axial_tilt" title="Axial tilt">Axial tilt</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7000214675497995303♠"></span>123°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>10°</span> (to Pluto–Charon orbit)<sup id="cite_ref-Weaver2016-supp_9-0" class="reference"><a href="#cite_note-Weaver2016-supp-9"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 11">: 11 </span></sup><br /><span class="nowrap"><span data-sort-value="6999837758040957280♠"></span>48°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>10°</span> (to <a href="/wiki/Celestial_equator" title="Celestial equator">celestial equator</a>)<sup id="cite_ref-axial-tilt_10-0" class="reference"><a href="#cite_note-axial-tilt-10"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">North pole <span class="nowrap"><a href="/wiki/Right_ascension" title="Right ascension">right ascension</a></span></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="7000610865238198016♠"></span>350°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>10°</span><sup id="cite_ref-Weaver2016_6-2" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 3">: 3 </span></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">North pole <a href="/wiki/Declination" title="Declination">declination</a></div></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="6999733038285837620♠"></span>42°<span style="margin-left:0.3em;margin-right:0.15em;">±</span>10°</span><sup id="cite_ref-Weaver2016_6-3" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 3">: 3 </span></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Albedo" title="Albedo">Albedo</a></th><td class="infobox-data"><span class="nowrap"><span data-sort-value="6999560000000000000♠"></span>0.56<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.05</span><sup id="cite_ref-Weaver2016_6-4" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 3">: 3 </span></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a></div></th><td class="infobox-data">23.38–23.7 (measured)<sup id="cite_ref-Stern06b_11-0" class="reference"><a href="#cite_note-Stern06b-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Absolute_magnitude#Solar_System_bodies_(H)" title="Absolute magnitude">Absolute magnitude <i>(H)</i></a></div></th><td class="infobox-data">8.28<sup id="cite_ref-Weaver2016_6-5" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 2">: 2 </span></sup></td></tr><tr><td colspan="2" class="infobox-below"><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"> </div></td></tr></tbody></table> <p><b>Nix</b> is a <a href="/wiki/Moons_of_Pluto" title="Moons of Pluto">natural satellite of Pluto</a>, with a diameter of 49.8 km (30.9 mi) across its longest dimension.<sup id="cite_ref-phasecurves_4-1" class="reference"><a href="#cite_note-phasecurves-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> It was discovered along with Pluto's outermost moon <a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a> on 15 May 2005 by astronomers using the <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble Space Telescope</a>,<sup id="cite_ref-Nomenclature_1-3" class="reference"><a href="#cite_note-Nomenclature-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> and was named after <a href="/wiki/Nyx_(mythology)" class="mw-redirect" title="Nyx (mythology)">Nyx</a>, the Greek goddess of the night.<sup id="cite_ref-plutomoons_12-0" class="reference"><a href="#cite_note-plutomoons-12"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Nix is the third moon of <a href="/wiki/Pluto" title="Pluto">Pluto</a> by distance, orbiting between the moons <a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a> and <a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a>.<sup id="cite_ref-scimag000_13-0" class="reference"><a href="#cite_note-scimag000-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p><p>Nix was imaged along with <a href="/wiki/Pluto" title="Pluto">Pluto</a> and its other moons by the <i><a href="/wiki/New_Horizons" title="New Horizons">New Horizons</a></i> spacecraft as it flew by the Pluto system in July 2015.<sup id="cite_ref-UniverseToday_14-0" class="reference"><a href="#cite_note-UniverseToday-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Images from the <i>New Horizons</i> spacecraft reveal a large reddish area on Nix that is likely an <a href="/wiki/Impact_crater" title="Impact crater">impact crater</a>.<sup id="cite_ref-SimonPort2015_15-0" class="reference"><a href="#cite_note-SimonPort2015-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Discovery">Discovery</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=1" title="Edit section: Discovery"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Pluto_system_2005_discovery_images.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Pluto_system_2005_discovery_images.jpg/220px-Pluto_system_2005_discovery_images.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Pluto_system_2005_discovery_images.jpg/330px-Pluto_system_2005_discovery_images.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/31/Pluto_system_2005_discovery_images.jpg/440px-Pluto_system_2005_discovery_images.jpg 2x" data-file-width="800" data-file-height="600" /></a><figcaption>Discovery images of Nix and Hydra</figcaption></figure> <p>Nix was independently discovered by Max Mutchler and Andrew Steffl, members of the Pluto Companion Search Team, using the <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble Space Telescope</a>.<sup id="cite_ref-plutomoons_12-1" class="reference"><a href="#cite_note-plutomoons-12"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> The <i>New Horizons</i> team had suspected that Pluto and its moon <a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a> might be accompanied by other moons, hence they used the Hubble Space Telescope to search for faint moons around Pluto in 2005.<sup id="cite_ref-ChasingNH_16-0" class="reference"><a href="#cite_note-ChasingNH-16"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Since Nix's brightness is about 5,000 times fainter than Pluto, long exposure images were taken in order to find it.<sup id="cite_ref-indepth_17-0" class="reference"><a href="#cite_note-indepth-17"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>The discovery images were taken on 15 May 2005 and 18 May 2005. The discoveries were announced on 31 October 2005, after confirmation by <a href="/wiki/Precovery" title="Precovery">precovering</a> archival Hubble images of Pluto from 2002.<sup id="cite_ref-hubblesite_18-0" class="reference"><a href="#cite_note-hubblesite-18"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> The two newly announced moons of Pluto were subsequently <a href="/wiki/Provisional_designation_in_astronomy" title="Provisional designation in astronomy">provisionally designated</a> S/2005 P 1 for Hydra and <b>S/2005 P 2</b> for Nix. The moons were informally referred to as "P1" and "P2", respectively by the discovery team.<sup id="cite_ref-IAUC8625_19-0" class="reference"><a href="#cite_note-IAUC8625-19"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Naming">Naming</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=2" title="Edit section: Naming"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Pluto_and_its_satellites_(2005).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Pluto_and_its_satellites_%282005%29.jpg/220px-Pluto_and_its_satellites_%282005%29.jpg" decoding="async" width="220" height="201" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Pluto_and_its_satellites_%282005%29.jpg/330px-Pluto_and_its_satellites_%282005%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Pluto_and_its_satellites_%282005%29.jpg/440px-Pluto_and_its_satellites_%282005%29.jpg 2x" data-file-width="868" data-file-height="792" /></a><figcaption>Hubble image of Pluto's moons (annotated)</figcaption></figure> <p>The name Nix was approved by the <a href="/wiki/International_Astronomical_Union" title="International Astronomical Union">International Astronomical Union</a> (IAU) and was announced on 21 June 2006 along with the naming of Hydra in the IAU Circular 8723.<sup id="cite_ref-IAUC8723_20-0" class="reference"><a href="#cite_note-IAUC8723-20"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Nix was named after <a href="/wiki/Nyx" title="Nyx">Nyx</a>, the Greek goddess of darkness and night and mother of <a href="/wiki/Charon_(mythology)" class="mw-redirect" title="Charon (mythology)">Charon</a>, the ferryman of <a href="/wiki/Hades" title="Hades">Hades</a> in <a href="/wiki/Greek_mythology" title="Greek mythology">Greek mythology</a>. The two newly named moons were intentionally named that the order of their initials <i>N</i> and <i>H</i> honors the <i>New Horizons</i> mission to Pluto, similarly to how the first two letters of Pluto's name honors <a href="/wiki/Percival_Lowell" title="Percival Lowell">Percival Lowell</a>.<sup id="cite_ref-UniverseToday2006_21-0" class="reference"><a href="#cite_note-UniverseToday2006-21"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ChasingNH_16-1" class="reference"><a href="#cite_note-ChasingNH-16"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> The original proposal for the naming of Nix was to use the <a href="/wiki/Classical_Greek" class="mw-redirect" title="Classical Greek">classical</a> spelling <a href="/wiki/Nyx_(mythology)" class="mw-redirect" title="Nyx (mythology)">Nyx</a>, but to avoid confusion with the <a href="/wiki/Asteroid" title="Asteroid">asteroid</a> <a href="/wiki/3908_Nyx" title="3908 Nyx">3908 Nyx</a>, the spelling was changed to Nix, the <a href="/wiki/Coptic_language" title="Coptic language">Coptic</a> spelling of the name.<sup id="cite_ref-UniverseToday2006_21-1" class="reference"><a href="#cite_note-UniverseToday2006-21"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> The adjectival form of the name is Nictian (cf. Russian Никта <i>Nikta</i>). </p><p>The names of features on the bodies in the Pluto system are related to mythology and the literature and history of exploration. In particular, the names of features on Nix must be related to deities of the night from literature, mythology, and history.<sup id="cite_ref-nomenclature_22-0" class="reference"><a href="#cite_note-nomenclature-22"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Origin">Origin</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=3" title="Edit section: Origin"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Pluto's smaller moons, including Nix, were thought to have formed from <a href="/wiki/Collisional_family" title="Collisional family">debris ejected from a massive collision</a> between Pluto and another Kuiper belt object, similarly to how the <a href="/wiki/Moon" title="Moon">Moon</a> is believed to have formed from debris ejected by a <a href="/wiki/Giant-impact_hypothesis" title="Giant-impact hypothesis">large collision of Earth</a>.<sup id="cite_ref-SternFormation_23-0" class="reference"><a href="#cite_note-SternFormation-23"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> The ejecta from the collision would then coalesce into the moons of Pluto.<sup id="cite_ref-chaos_24-0" class="reference"><a href="#cite_note-chaos-24"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> However, the collisional hypothesis cannot explain how Nix maintained its highly reflective surface.<sup id="cite_ref-DPS15_25-0" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Physical_characteristics">Physical characteristics</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=4" title="Edit section: Physical characteristics"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nix has an elongated shape, with its longest axis measured at 49.8 km (30.9 mi) across and its shortest axis 31.1 km (19.3 mi) across. This gives Nix the measured dimensions of 49.8 km × 33.2 km × 31.1 km (30.9 mi × 20.6 mi × 19.3 mi).<sup id="cite_ref-phasecurves_4-2" class="reference"><a href="#cite_note-phasecurves-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> It is the third-largest moon of Pluto, being slightly smaller than <a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a>. </p><p>Early research appeared to show that the surface of Nix is reddish in color.<sup id="cite_ref-Buie_2006_26-0" class="reference"><a href="#cite_note-Buie_2006-26"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> Contrary to this, other studies show that Nix is spectrally neutral, similar to the small moons of Pluto.<sup id="cite_ref-Stern06b_11-1" class="reference"><a href="#cite_note-Stern06b-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Weaver2016_6-6" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The neutral spectrum of Nix signifies that water ice is present on its surface.<sup id="cite_ref-DPS15_25-1" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Nix also appeared to vary in brightness and <a href="/wiki/Albedo" title="Albedo">albedo</a>, or reflectivity.<sup id="cite_ref-Stern06b_11-2" class="reference"><a href="#cite_note-Stern06b-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> The brightness fluctuations were thought to be caused by areas with different albedos on the surface of Nix.<sup id="cite_ref-Stern06b_11-3" class="reference"><a href="#cite_note-Stern06b-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> Images of Nix from the <i>New Horizons</i> spacecraft show a large reddish area approximately 18 km (11 mi) across, which could explain the two conflicting measurements of Nix's surface color.<sup id="cite_ref-UniverseToday_14-1" class="reference"><a href="#cite_note-UniverseToday-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-nasa.gov_27-0" class="reference"><a href="#cite_note-nasa.gov-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p><p>The reddish area is thought to be a large impact crater where the reddish material was ejected from underneath Nix's water ice layer and deposited on its surface.<sup id="cite_ref-SimonPort2015_15-1" class="reference"><a href="#cite_note-SimonPort2015-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> In this case, Nix would likely have <a href="/wiki/Regolith" title="Regolith">regoliths</a> originating from the impact.<sup id="cite_ref-Weaver2016_6-7" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Another explanation suggests that the reddish material may have originated from a collision with Nix and another object with a different composition. However, there were no significant color variations on other impact craters on Nix.<sup id="cite_ref-Weaver2016_6-8" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Simulation_of_Nix_Rotation.ogv/220px--Simulation_of_Nix_Rotation.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="124" data-durationhint="100" data-mwtitle="Simulation_of_Nix_Rotation.ogv" data-mwprovider="wikimediacommons" resource="/wiki/File:Simulation_of_Nix_Rotation.ogv"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.480p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.720p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/8/8b/Simulation_of_Nix_Rotation.ogv" type="video/ogg; codecs="theora, vorbis"" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.240p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.360p.vp9.webm" type="video/webm; codecs="vp9, opus"" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/8/8b/Simulation_of_Nix_Rotation.ogv/Simulation_of_Nix_Rotation.ogv.360p.webm" type="video/webm; codecs="vp8, vorbis"" data-transcodekey="360p.webm" data-width="640" data-height="360" /></video></span><figcaption>Simulation of Nix, modelled as an <a href="/wiki/Ellipsoid" title="Ellipsoid">ellipsoid</a>, showing its <a href="/wiki/Chaotic_rotation" title="Chaotic rotation">chaotic rotation</a></figcaption></figure> <p>The water ice present on the surface of Nix is responsible for its high reflectivity.<sup id="cite_ref-UniverseToday_14-2" class="reference"><a href="#cite_note-UniverseToday-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-DPS15_25-2" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Trace amounts of frozen <a href="/wiki/Methane" title="Methane">methane</a> may be also present on the surface of Nix, and could be responsible for the presence of reddish material, likely <a href="/wiki/Tholin" title="Tholin">tholins</a>, on its surface.<sup id="cite_ref-UniverseToday_14-3" class="reference"><a href="#cite_note-UniverseToday-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> In this case, tholins on the surface of Nix may have originated from the reaction of methane with <a href="/wiki/Ultraviolet" title="Ultraviolet">ultraviolet</a> radiation from the <a href="/wiki/Sun" title="Sun">Sun</a>.<sup id="cite_ref-UniverseToday_14-4" class="reference"><a href="#cite_note-UniverseToday-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> Derived from crater counting data from <i>New Horizons</i>, the age of Nix's surface is estimated to be at least four billion years old.<sup id="cite_ref-arxiv1803_28-0" class="reference"><a href="#cite_note-arxiv1803-28"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Weaver2016_6-9" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Rotation">Rotation</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=5" title="Edit section: Rotation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:A_day_on_Nix.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/A_day_on_Nix.png/220px-A_day_on_Nix.png" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/ca/A_day_on_Nix.png/330px-A_day_on_Nix.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/ca/A_day_on_Nix.png/440px-A_day_on_Nix.png 2x" data-file-width="3000" data-file-height="2000" /></a><figcaption>Six images of Nix taken by the New Horizons in July 2015 (contrast enhanced)</figcaption></figure> <p>Nix is not <a href="/wiki/Tidal_locking" title="Tidal locking">tidally locked</a> and <a href="/wiki/Tumbling_(rigid_body)" class="mw-redirect" title="Tumbling (rigid body)">tumbles</a> <a href="/wiki/Chaos_theory" title="Chaos theory">chaotically</a> similarly to all smaller moons of Pluto; the moon's axial tilt and rotation period vary greatly over short timescales.<sup id="cite_ref-chaos_24-1" class="reference"><a href="#cite_note-chaos-24"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> Due to the chaotic rotation of Nix, it can occasionally flip its entire <a href="/wiki/Rotation_around_a_fixed_axis" title="Rotation around a fixed axis">rotational axis</a>.<sup id="cite_ref-NYT2015_29-0" class="reference"><a href="#cite_note-NYT2015-29"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> The varying gravitational influences of Pluto and Charon as they orbit their <a href="/wiki/Barycenter" class="mw-redirect" title="Barycenter">barycenter</a> causes the chaotic tumbling of Pluto's small moons, including Nix.<sup id="cite_ref-chaos_24-2" class="reference"><a href="#cite_note-chaos-24"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> The chaotic tumbling of Nix is also strengthened by its elongated shape, which creates <a href="/wiki/Torque" title="Torque">torques</a> that act on the object.<sup id="cite_ref-chaos_24-3" class="reference"><a href="#cite_note-chaos-24"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ShowalterHamilton2015_3-1" class="reference"><a href="#cite_note-ShowalterHamilton2015-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> At the time of the <i>New Horizons</i> flyby, Nix was rotating with a period of 43.9 hours retrograde to Pluto's equator with an axial tilt of 132 degrees — it was rotating backwards in relation to its orbit around Pluto.<sup id="cite_ref-DPS15_25-3" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> The rotation rate of Nix had increased by 10 percent since Nix was discovered.<sup id="cite_ref-DPS15_25-4" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Orbit">Orbit</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=6" title="Edit section: Orbit"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1237032888/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box;text-align:center}.mw-parser-output .tmulti .tsingle .thumbcaption{text-align:left}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmulti .multiimageinner img{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmulti .multiimageinner img{background-color:white}}</style><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:408px;max-width:408px"><div class="trow"><div class="theader">Animation of moons of Pluto around the <a href="/wiki/Barycenter" class="mw-redirect" title="Barycenter">barycenter</a> of Pluto – <a href="/wiki/Ecliptic" title="Ecliptic">Ecliptic</a> plane</div></div><div class="trow"><div class="tsingle" style="width:202px;max-width:202px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Animation_of_moons_of_Pluto_-_Front_view.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/60/Animation_of_moons_of_Pluto_-_Front_view.gif/200px-Animation_of_moons_of_Pluto_-_Front_view.gif" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/60/Animation_of_moons_of_Pluto_-_Front_view.gif/300px-Animation_of_moons_of_Pluto_-_Front_view.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/60/Animation_of_moons_of_Pluto_-_Front_view.gif/400px-Animation_of_moons_of_Pluto_-_Front_view.gif 2x" data-file-width="560" data-file-height="420" /></a></span></div><div class="thumbcaption">Front view</div></div><div class="tsingle" style="width:202px;max-width:202px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Animation_of_moons_of_Pluto_-_Side_view.gif" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Animation_of_moons_of_Pluto_-_Side_view.gif/200px-Animation_of_moons_of_Pluto_-_Side_view.gif" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Animation_of_moons_of_Pluto_-_Side_view.gif/300px-Animation_of_moons_of_Pluto_-_Side_view.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/56/Animation_of_moons_of_Pluto_-_Side_view.gif/400px-Animation_of_moons_of_Pluto_-_Side_view.gif 2x" data-file-width="560" data-file-height="420" /></a></span></div><div class="thumbcaption">Side view</div></div></div><div class="trow" style="display:flex"><div class="thumbcaption"><style data-mw-deduplicate="TemplateStyles:r981673959">.mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}</style><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:khaki; color:black;"> </span>  <a href="/wiki/Pluto" title="Pluto">Pluto</a></span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:RoyalBlue; color:white;"> </span>  <a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a></span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:Lime; color:black;"> </span>  <a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a></span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:Magenta; color:black;"> </span>  Nix</span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:Cyan; color:black;"> </span>  <a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a></span> <b>·</b> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><span class="legend nowrap"><span class="legend-color mw-no-invert" style="background-color:Orangered; color:black;"> </span>  <a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a></span></div></div></div></div> <p>Nix orbits the Pluto-Charon <a href="/wiki/Barycenter" class="mw-redirect" title="Barycenter">barycenter</a> at a distance of 48,694 km (30,257 mi), between the orbits of <a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a> and <a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a>.<sup id="cite_ref-scimag000_13-1" class="reference"><a href="#cite_note-scimag000-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> All of Pluto's moons including Nix have very circular orbits that are coplanar to Charon's orbit; the moons of Pluto have very low <a href="/wiki/Orbital_inclination" title="Orbital inclination">orbital inclinations</a> to Pluto's equator.<sup id="cite_ref-arxiv0511837_30-0" class="reference"><a href="#cite_note-arxiv0511837-30"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-arxiv0802.2951_31-0" class="reference"><a href="#cite_note-arxiv0802.2951-31"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> The nearly circular and coplanar orbits of Pluto's moons suggest that they may have gone through tidal evolutions since their formation.<sup id="cite_ref-arxiv0511837_30-1" class="reference"><a href="#cite_note-arxiv0511837-30"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> At the time of the formation of Pluto's smaller moons, Nix may have had a more <a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">eccentric</a> orbit around the Pluto-Charon barycenter.<sup id="cite_ref-tidaldamping_32-0" class="reference"><a href="#cite_note-tidaldamping-32"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> The present circular orbit of Nix may have been caused by Charon's tidal damping of the eccentricity of Nix's orbit, through tidal interactions. The mutual tidal interactions of Charon on Nix's orbit would cause Nix to transfer its orbital eccentricity to Charon, thus causing the orbit of Nix to gradually become more circular over time.<sup id="cite_ref-tidaldamping_32-1" class="reference"><a href="#cite_note-tidaldamping-32"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p><p>Nix has an orbital period of 24.8546 days and its orbit is resonant with other moons of Pluto.<sup id="cite_ref-ShowalterHamilton2015_3-2" class="reference"><a href="#cite_note-ShowalterHamilton2015-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Nix is in a 3:2 <a href="/wiki/Orbital_resonance" title="Orbital resonance">orbital resonance</a> with Hydra, and a 9:11 resonance with Styx (the ratios represent numbers of orbits completed per unit time; the period ratios are the inverses).<sup id="cite_ref-ShowalterHamilton2015_3-3" class="reference"><a href="#cite_note-ShowalterHamilton2015-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Witze2015_33-0" class="reference"><a href="#cite_note-Witze2015-33"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> As a result of this "Laplace-like" 3-body resonance, it has conjunctions with Styx and Hydra in a 2:3 ratio. </p><p>Nix's orbital period is close to a 1:4 orbital resonance with Charon, with a timing discrepancy of 2.8%; there is no active resonance.<sup id="cite_ref-ShowalterHamilton2015_3-4" class="reference"><a href="#cite_note-ShowalterHamilton2015-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Buie_2006_26-1" class="reference"><a href="#cite_note-Buie_2006-26"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> A hypothesis explaining such a near-resonance is that the resonances originated before the outward migration of Charon following the formation of all five known moons, and is maintained by the periodic local fluctuation of 9 percent in the Pluto–Charon gravitational field strength.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>c<span class="cite-bracket">]</span></a></sup> </p> <div class="center" style="width:auto; margin-left:auto; margin-right:auto;"> <div class="center"><div class="noresize thumb tnone" style=";"> <div class="thumbinner" style="overflow:hidden;width:627px;"> <div class="thumbimage" style="height:126px; overflow:hidden; position:relative; background-color:white;"> <div style=";left:0px; top:0px; width:625px; position:absolute;"> <span typeof="mw:File"><a href="/wiki/File:Hydra,_Nix,_Styx_conjunctions_cycle.png" class="mw-file-description" title="Sequence of conjunctions of Hydra (blue), Nix (red) and Styx (black) over one third of their resonance cycle. Movements are counterclockwise and orbits completed are tallied at upper right of diagrams (click on image to see the whole cycle)."><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/625px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png" decoding="async" width="625" height="250" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/938px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/1250px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png 2x" data-file-width="1870" data-file-height="748" /></a></span></div> <div style="text-align:left; background-color:transparent; line-height:110%;"> </div> <div style="visibility:hidden"><span class="noviewer" typeof="mw:File/Frameless"><a href="/wiki/File:Hydra,_Nix,_Styx_conjunctions_cycle.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/625px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png" decoding="async" width="625" height="250" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/938px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png/1250px-Hydra%2C_Nix%2C_Styx_conjunctions_cycle.png 2x" data-file-width="1870" data-file-height="748" /></a></span></div> </div> <div class="thumbcaption"><div class="magnify"><a href="/wiki/File:Hydra,_Nix,_Styx_conjunctions_cycle.png" title="File:Hydra, Nix, Styx conjunctions cycle.png"> </a></div>Sequence of conjunctions of Hydra (blue), Nix (red) and Styx (black) over one third of their resonance cycle. Movements are counterclockwise and orbits completed are tallied at upper right of diagrams (click on image to see the whole cycle).</div> </div></div></div> </div> <div class="mw-heading mw-heading2"><h2 id="Exploration">Exploration</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=7" title="Edit section: Exploration"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237032888/mw-parser-output/.tmulti"><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:259px;max-width:259px"><div class="trow"><div class="tsingle" style="width:123px;max-width:123px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Nix_in_Color_Released_September_11_2015.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/85/Nix_in_Color_Released_September_11_2015.png/121px-Nix_in_Color_Released_September_11_2015.png" decoding="async" width="121" height="127" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/85/Nix_in_Color_Released_September_11_2015.png/182px-Nix_in_Color_Released_September_11_2015.png 1.5x, //upload.wikimedia.org/wikipedia/commons/8/85/Nix_in_Color_Released_September_11_2015.png 2x" data-file-width="206" data-file-height="217" /></a></span></div><div class="thumbcaption">LORRI and MVIC color composite image of Nix</div></div><div class="tsingle" style="width:132px;max-width:132px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Pluto%27s_Moon_Nix,_Half_Illuminated.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg/130px-Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg" decoding="async" width="130" height="128" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg/195px-Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg/260px-Pluto%27s_Moon_Nix%2C_Half_Illuminated.jpg 2x" data-file-width="1042" data-file-height="1024" /></a></span></div><div class="thumbcaption">Nix half illuminated, imaged by <i><a href="/wiki/New_Horizons" title="New Horizons">New Horizons</a></i></div></div></div></div></div> <p>The <i><a href="/wiki/New_Horizons" title="New Horizons">New Horizons</a></i> spacecraft visited the Pluto system and photographed Pluto and its moons during its flyby on 14 July 2015. Of Pluto's smaller moons, only Nix and Hydra were imaged at resolutions high enough for surface features to be visible.<sup id="cite_ref-DPS15_25-5" class="reference"><a href="#cite_note-DPS15-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Prior to the flyby of the Pluto system, measurements of Nix's size were performed by the <a href="/wiki/Long_Range_Reconnaissance_Imager" title="Long Range Reconnaissance Imager">Long Range Reconnaissance Imager</a> on board <i>New Horizons</i>, initially estimating Nix to be about 35 km (22 mi) in diameter.<sup id="cite_ref-Measurement_35-0" class="reference"><a href="#cite_note-Measurement-35"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> The first detailed images of Nix taken by <i>New Horizons</i> from a distance of about 231,000 km (144,000 mi) were downlinked, or received from the spacecraft on 18 July 2015 and released to the public on 21 July 2015.<sup id="cite_ref-nasa.gov_27-1" class="reference"><a href="#cite_note-nasa.gov-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> With an image resolution 3 km (1.9 mi) per pixel, Nix's shape was often referred to as a "jelly bean" shape.<sup id="cite_ref-nasa.gov_27-2" class="reference"><a href="#cite_note-nasa.gov-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> Enhanced color images from the <a href="/wiki/Ralph_(New_Horizons)" title="Ralph (New Horizons)">Ralph MVIC</a> instrument of <i>New Horizons</i> show a reddish region on its surface.<sup id="cite_ref-nasa.gov_27-3" class="reference"><a href="#cite_note-nasa.gov-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> From those images, another accurate measurement of Nix's dimensions was made, giving the approximate dimensions of 42 km × 36 km (26 mi × 22 mi).<sup id="cite_ref-nasa.gov_27-4" class="reference"><a href="#cite_note-nasa.gov-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </p> <div style="clear:both;" class=""></div> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nix_(moon)&action=edit&section=8" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">The full list of discoverers includes <a href="/wiki/Hal_A._Weaver" title="Hal A. Weaver">H. A. Weaver</a>, <a href="/wiki/S._Alan_Stern" class="mw-redirect" title="S. Alan Stern">S. A. Stern</a>, M. J. Mutchler, A. J. Steffl, <a href="/wiki/Marc_W._Buie" class="mw-redirect" title="Marc W. Buie">M. W. Buie</a>, W. J. Merline, J. R. Spencer, E. F. Young, and L. A. Young.<sup id="cite_ref-Nomenclature_1-1" class="reference"><a href="#cite_note-Nomenclature-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></span> </li> <li id="cite_note-axial-tilt-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-axial-tilt_10-0">^</a></b></span> <span class="reference-text">Given Nix's rotational north pole <a href="/wiki/Declination" title="Declination">declination</a> of +42°,<sup id="cite_ref-Weaver2016_6-1" class="reference"><a href="#cite_note-Weaver2016-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page: 5">: 5 </span></sup> subtracting this angle from the north <a href="/wiki/Celestial_pole" title="Celestial pole">celestial pole</a> of +90° gives the inclination with respect to the <a href="/wiki/Celestial_equator" title="Celestial equator">celestial equator</a>: <i>i</i> = +90° – (+42°) = +48°.</span> </li> <li id="cite_note-34"><span class="mw-cite-backlink"><b><a href="#cite_ref-34">^</a></b></span> <span class="reference-text"> The instantaneous force in the Pluto–Charon–Nix alignment case is 9.46% larger than in the quadrature case (where Nix is 90° from the Pluto–Charon axis); the Charon–Pluto–Nix case is almost exactly halfway between these values. In Buie <i>et al.</i>, the quote is "The gravitational force exerted by Pluto on either P1 or P2 varies by roughly 15% (peak-to-peak)." Pluto's gravitational pull, <i>by itself</i>, varies by 18% for Nix and 13% for Hydra.</span> </li> </ol></div></div> <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=Nix_(moon)&action=edit&section=9" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-Nomenclature-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-Nomenclature_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Nomenclature_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Nomenclature_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Nomenclature_1-3"><sup><i><b>d</b></i></sup></a></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://planetarynames.wr.usgs.gov/Page/Planets">"Planet and Satellite Names and Discoverers"</a>. <i>Gazetteer of Planetary Nomenclature</i>. 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data-file-height="1376" /></span></span></div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <span style="font-weight: bold; font-style: italic;"><a href="https://commons.wikimedia.org/wiki/Category:Nix" class="extiw" title="commons:Category:Nix">Nix</a></span>.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20060626220516/http://www.boulder.swri.edu/plutonews/">Background Information Regarding Our Two Newly Discovered Satellites of Pluto</a> – The discoverers' website</li> <li><a rel="nofollow" class="external text" href="http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/19/">NASA's Hubble Reveals Possible New Moons Around Pluto</a> – Hubble press release</li> <li><a rel="nofollow" class="external text" href="https://solarsystem.nasa.gov/moons/pluto-moons/nix/in-depth/">Nix In Depth</a> – NASA Solar System Exploration</li></ul> <div class="navbox-styles"><style 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.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="Pluto" 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"><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:Pluto" title="Template:Pluto"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Pluto" title="Template talk:Pluto"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Pluto" title="Special:EditPage/Template:Pluto"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Pluto" style="font-size:114%;margin:0 4em"><a href="/wiki/Pluto" title="Pluto">Pluto</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><a href="/wiki/Atmosphere_of_Pluto" title="Atmosphere of Pluto">Atmosphere</a></li> <li><a href="/wiki/Climate_of_Pluto" title="Climate of Pluto">Climate</a></li> <li><a href="/wiki/Geology_of_Pluto" title="Geology of Pluto">Geology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Geography_of_Pluto" title="Geography of Pluto">Geography</a><br />(<a href="/wiki/List_of_geological_features_on_Pluto" title="List of geological features on Pluto">features</a>)</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%;text-align: right;">Regions</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/Geography_of_Pluto#The_Brass_Knuckles" title="Geography of Pluto">Brass Knuckles</a>" <ul><li><a href="/wiki/Safronov_Regio" title="Safronov Regio">Safronov</a></li> <li><a href="/wiki/Sharaf_Regio" title="Sharaf Regio">Sharaf</a></li> <li><a href="/wiki/Harrington_Regio" title="Harrington Regio">Harrington</a></li> <li><a href="/wiki/Vucub-Came_Macula" title="Vucub-Came Macula">Vucub-Came</a></li> <li><a href="/wiki/Hun-Came_Macula" title="Hun-Came Macula">Hun-Came</a></li> <li><a href="/wiki/Meng-p%CA%BBo_Macula" class="mw-redirect" title="Meng-pʻo Macula">Meng-pʻo</a></li></ul></li> <li><a href="/wiki/Belton_Regio" title="Belton Regio">Belton</a></li> <li><a href="/wiki/Cadejo_Macula" title="Cadejo Macula">Cadejo</a></li> <li><a href="/wiki/Hayabusa_Terra" title="Hayabusa Terra">Hayabusa</a></li> <li><a href="/wiki/Lowell_Regio" title="Lowell Regio">Lowell</a></li> <li><a href="/wiki/Morgoth_Macula" title="Morgoth Macula">Morgoth</a></li> <li><a href="/wiki/Pioneer_Terra" class="mw-redirect" title="Pioneer Terra">Pioneer</a></li> <li><a href="/wiki/Tombaugh_Regio" title="Tombaugh Regio">Tombaugh "The Heart"</a></li> <li><a href="/wiki/Venera_Terra" class="mw-redirect" title="Venera Terra">Venera</a></li> <li><a href="/wiki/Viking_Terra" class="mw-redirect" title="Viking Terra">Viking</a></li> <li><a href="/wiki/Voyager_Terra" title="Voyager Terra">Voyager</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Hills and<br /> mountains</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/Baret_Montes" title="Baret Montes">Baret Montes</a></li> <li><a href="/wiki/Challenger_Colles" title="Challenger Colles">Challenger Colles</a></li> <li><a href="/wiki/Coleta_de_Dados_Colles" title="Coleta de Dados Colles">Coleta de Dados Colles</a></li> <li><a href="/wiki/Hillary_Montes" title="Hillary Montes">Hillary Montes</a></li> <li><a href="/wiki/Piccard_Mons" title="Piccard Mons">Piccard Mons</a></li> <li><a href="/wiki/Tenzing_Montes" title="Tenzing Montes">Tenzing Montes</a></li> <li><a href="/wiki/Wright_Mons" title="Wright Mons">Wright Mons</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Plains</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/Sputnik_Planitia" title="Sputnik Planitia">Sputnik Planitia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Valleys and<br />depressions</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/Adlivun_Cavus" title="Adlivun Cavus">Adlivun Cavus</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Lineae</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/Luna_Linea" title="Luna Linea">Luna Linea</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Craters</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/Burney_(crater)" title="Burney (crater)">Burney</a></li></ul> </div></td></tr></tbody></table><div></div></td><td class="noviewer navbox-image" rowspan="5" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Pluto_in_True_Color_-_High-Res.jpg" class="mw-file-description" title="Pluto"><img alt="Pluto" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Pluto_in_True_Color_-_High-Res.jpg/90px-Pluto_in_True_Color_-_High-Res.jpg" decoding="async" width="90" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Pluto_in_True_Color_-_High-Res.jpg/135px-Pluto_in_True_Color_-_High-Res.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Pluto_in_True_Color_-_High-Res.jpg/180px-Pluto_in_True_Color_-_High-Res.jpg 2x" data-file-width="8000" data-file-height="8000" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:NH-PlutoCharon-Color-NewHorizons-20150711.jpg" class="mw-file-description" title="Both to scale"><img alt="Both to scale" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/NH-PlutoCharon-Color-NewHorizons-20150711.jpg/90px-NH-PlutoCharon-Color-NewHorizons-20150711.jpg" decoding="async" width="90" height="47" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/NH-PlutoCharon-Color-NewHorizons-20150711.jpg/135px-NH-PlutoCharon-Color-NewHorizons-20150711.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/NH-PlutoCharon-Color-NewHorizons-20150711.jpg/180px-NH-PlutoCharon-Color-NewHorizons-20150711.jpg 2x" data-file-width="1422" data-file-height="744" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:Charon_in_True_Color_-_High-Res.jpg" class="mw-file-description" title="Charon"><img alt="Charon" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Charon_in_True_Color_-_High-Res.jpg/90px-Charon_in_True_Color_-_High-Res.jpg" decoding="async" width="90" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Charon_in_True_Color_-_High-Res.jpg/135px-Charon_in_True_Color_-_High-Res.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Charon_in_True_Color_-_High-Res.jpg/180px-Charon_in_True_Color_-_High-Res.jpg 2x" data-file-width="2000" data-file-height="2000" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Moons_of_Pluto" title="Moons of Pluto">Moons</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><b><a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a></b></li> <li><a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a></li> <li><a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a></li> <li><a class="mw-selflink selflink">Nix</a></li> <li><a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Exploration_of_Pluto" title="Exploration of Pluto">Exploration</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><i><a href="/wiki/New_Horizons" title="New Horizons">New Horizons</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Astronomy</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%;text-align: right;">Official definitions</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/Definition_of_planet" title="Definition of planet">Definition of planet</a></li> <li><a href="/wiki/IAU_definition_of_planet" title="IAU definition of planet">IAU definition of planet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Scientist opinions</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/Alan_Stern#Planetary_classification" title="Alan Stern">Alan Stern</a></li> <li><a href="/wiki/Michael_E._Brown#Other_work" title="Michael E. Brown">Michael E. Brown</a></li> <li><a href="/wiki/Neil_deGrasse_Tyson#Pluto" title="Neil deGrasse Tyson">Neil deGrasse Tyson</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">Discovery</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/Planets_beyond_Neptune#Discovery_of_Pluto" title="Planets beyond Neptune">Planet X</a></li> <li><a href="/wiki/Lowell_Observatory" title="Lowell Observatory">Lowell Observatory</a> <ul><li><a href="/wiki/Percival_Lowell#Pluto" title="Percival Lowell">Percival Lowell</a></li> <li><a href="/wiki/Clyde_Tombaugh#Pluto" title="Clyde Tombaugh">Clyde Tombaugh</a></li> <li><a href="/wiki/Roger_Putnam#Role_in_discovering_Pluto" title="Roger Putnam">Roger Putnam</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: right;">General</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/Double_planet" title="Double planet">Double planet</a></li> <li><a href="/wiki/Dwarf_planet" title="Dwarf planet">Dwarf planet</a></li> <li><a href="/wiki/Planet" title="Planet">Planet</a></li> <li><a href="/wiki/Plutino" title="Plutino">Plutino</a></li> <li><a href="/wiki/Trans-Neptunian_object" title="Trans-Neptunian object">Trans-Neptunian object</a></li> <li><a href="/wiki/Kuiper_belt" title="Kuiper belt">Kuiper belt</a></li></ul> </div></td></tr></tbody></table><div></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/Pluto_in_fiction" title="Pluto in fiction">Fiction</a></li> <li><a href="/wiki/Pluto_(mythology)" title="Pluto (mythology)">Mythology</a></li> <li><a href="/wiki/Venetia_Burney" title="Venetia Burney">Venetia Burney</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"></div><div role="navigation" class="navbox" aria-labelledby="Moons_of_likely_dwarf_planets" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="text-align: center;"><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:Moons_of_dwarf_planets" title="Template:Moons of dwarf planets"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Moons_of_dwarf_planets" title="Template talk:Moons of dwarf planets"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Moons_of_dwarf_planets" title="Special:EditPage/Template:Moons of dwarf planets"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Moons_of_likely_dwarf_planets" style="font-size:114%;margin:0 4em"><a href="/wiki/Natural_satellite" title="Natural satellite">Moons</a> of <a href="/wiki/List_of_possible_dwarf_planets" title="List of possible dwarf planets">likely dwarf planets</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0;background:transparent;color:inherit;"><div style="padding:0px"><table class="navbox-columns-table" style="border-spacing: 0px; text-align:left;width:100%;"><tbody><tr><td class="navbox-abovebelow" style="font-weight:bold;"><a href="/wiki/Moons_of_Pluto" title="Moons of Pluto">Pluto</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/Moons_of_Haumea" title="Moons of Haumea">Haumea</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/Eris_(dwarf_planet)" title="Eris (dwarf planet)">Eris</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/Makemake" title="Makemake">Makemake</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/225088_Gonggong" class="mw-redirect" title="225088 Gonggong">Gonggong</a></td></tr><tr style="vertical-align:top"><td class="navbox-list" style="padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a></li> <li><a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a></li> <li><a class="mw-selflink selflink">Nix</a></li> <li><a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a></li> <li><a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Rings_of_Haumea" class="mw-redirect" title="Rings of Haumea">ring</a></li> <li><a href="/wiki/Namaka_(moon)" title="Namaka (moon)">Namaka</a></li> <li><a href="/wiki/Hi%CA%BBiaka_(moon)" title="Hiʻiaka (moon)">Hiʻiaka</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Dysnomia_(moon)" title="Dysnomia (moon)">Dysnomia</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/S/2015_(136472)_1" title="S/2015 (136472) 1">S/2015 (136472) 1</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Xiangliu_(moon)" title="Xiangliu (moon)">Xiangliu</a></li></ul> </div></td></tr></tbody></table></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0;background:transparent;color:inherit;"><div style="padding:0px"><table class="navbox-columns-table" style="border-spacing: 0px; text-align:left;width:100%;"><tbody><tr><td class="navbox-abovebelow" style="font-weight:bold;"><a href="/wiki/50000_Quaoar" class="mw-redirect" title="50000 Quaoar">Quaoar</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/90482_Orcus" class="mw-redirect" title="90482 Orcus">Orcus</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/120347_Salacia" title="120347 Salacia">Salacia</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><a href="/wiki/174567_Varda" title="174567 Varda">Varda</a></td><td class="navbox-abovebelow" style="border-left:2px solid #fdfdfd;font-weight:bold;"><span class="nowrap"><a href="/wiki/2013_FY27" class="mw-redirect" title="2013 FY27">2013 FY<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">27</span></span></a></span></td></tr><tr style="vertical-align:top"><td class="navbox-list" style="padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/50000_Quaoar#Rings" class="mw-redirect" title="50000 Quaoar">rings</a></li> <li><a href="/wiki/Weywot" title="Weywot">Weywot</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Vanth_(moon)" title="Vanth (moon)">Vanth</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Actaea_(moon)" title="Actaea (moon)">Actaea</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/Ilmar%C3%AB" title="Ilmarë">Ilmarë</a></li></ul> </div></td><td class="navbox-list" style="border-left:2px solid #fdfdfd;padding:0px;text-align: center;width:20%;"><div> <ul><li><a href="/wiki/S/2018_(532037)_1" class="mw-redirect" title="S/2018 (532037) 1"><span class="nowrap">2013 FY<sub>27</sub></span> I</a></li></ul> </div></td></tr></tbody></table></div></td></tr></tbody></table><div></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="Trans-Neptunian_objects" style="padding:3px"><table class="nowraplinks 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:Trans-Neptunian_objects_navbox" title="Template:Trans-Neptunian objects navbox"><abbr title="View this template">v</abbr></a></li><li 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disc">Scattered-disc objects</a></li> <li><a href="/wiki/Detached_object" title="Detached object">Detached objects</a></li> <li><a href="/wiki/Resonant_trans-Neptunian_object" title="Resonant trans-Neptunian object">Resonant objects</a> <ul><li><a href="/wiki/Neptune_trojan" title="Neptune trojan">Neptune trojans</a></li> <li><a href="/wiki/Plutino" title="Plutino">Plutinos</a></li> <li><a href="/wiki/Resonant_trans-Neptunian_object#1:2_resonance_("twotinos",_period_~330_years)" title="Resonant trans-Neptunian object">Twotinos</a></li></ul></li> <li><a href="/wiki/Minor-planet_moon#Trans-Neptunian_objects" title="Minor-planet moon">TNO moons</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;white-space: normal; text-align:center;"><a href="/wiki/Dwarf_planet" title="Dwarf planet">Dwarf planets</a> <span class="nowrap">(moons)</span></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Orcus_(dwarf_planet)" title="Orcus (dwarf planet)">Orcus</a> <ul><li><a href="/wiki/Vanth_(moon)" title="Vanth (moon)">Vanth</a></li></ul></li> <li><a href="/wiki/Pluto" title="Pluto">Pluto</a> <ul><li><a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a></li> <li><a href="/wiki/Styx_(moon)" title="Styx (moon)">Styx</a></li> <li><a class="mw-selflink selflink">Nix</a></li> <li><a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos</a></li> <li><a href="/wiki/Hydra_(moon)" title="Hydra (moon)">Hydra</a></li></ul></li> <li><a href="/wiki/Haumea" title="Haumea">Haumea</a> <ul><li><a href="/wiki/Namaka_(moon)" title="Namaka (moon)">Namaka</a></li> <li><a href="/wiki/Hi%CA%BBiaka_(moon)" title="Hiʻiaka (moon)">Hiʻiaka</a></li> <li><a href="/wiki/Haumea#Ring" title="Haumea">Ring</a></li></ul></li> <li><a href="/wiki/Quaoar" title="Quaoar">Quaoar</a> <ul><li><a href="/wiki/Weywot_(moon)" class="mw-redirect" title="Weywot (moon)">Weywot</a></li> <li><a href="/wiki/50000_Quaoar#Rings" class="mw-redirect" title="50000 Quaoar">Rings</a></li></ul></li> <li><a href="/wiki/Makemake" title="Makemake">Makemake</a> <ul><li><a href="/wiki/S/2015_(136472)_1" title="S/2015 (136472) 1">MK2</a></li></ul></li> <li><a href="/wiki/Gonggong_(dwarf_planet)" title="Gonggong (dwarf planet)">Gonggong</a> <ul><li><a href="/wiki/Xiangliu_(moon)" title="Xiangliu (moon)">Xiangliu</a></li></ul></li> <li><a href="/wiki/Eris_(dwarf_planet)" title="Eris (dwarf planet)">Eris</a> <ul><li><a href="/wiki/Dysnomia_(moon)" title="Dysnomia (moon)">Dysnomia</a></li></ul></li> <li><a href="/wiki/Sedna_(dwarf_planet)" title="Sedna (dwarf planet)">Sedna</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;white-space: normal; text-align:center;"><a href="/wiki/Sednoid" title="Sednoid">Sednoids</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/90377_Sedna" class="mw-redirect" title="90377 Sedna">90377 Sedna</a></li> <li><span class="nowrap"><a href="/wiki/2012_VP113" title="2012 VP113">2012 VP<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">113</span></span></a></span></li> <li><a href="/wiki/541132_Lele%C4%81k%C5%ABhonua" title="541132 Leleākūhonua">541132 Leleākūhonua</a></li></ul> </div></td></tr></tbody></table></div> <style data-mw-deduplicate="TemplateStyles:r1130092004">.mw-parser-output .portal-bar{font-size:88%;font-weight:bold;display:flex;justify-content:center;align-items:baseline}.mw-parser-output .portal-bar-bordered{padding:0 2em;background-color:#fdfdfd;border:1px solid #a2a9b1;clear:both;margin:1em auto 0}.mw-parser-output .portal-bar-related{font-size:100%;justify-content:flex-start}.mw-parser-output .portal-bar-unbordered{padding:0 1.7em;margin-left:0}.mw-parser-output .portal-bar-header{margin:0 1em 0 0.5em;flex:0 0 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