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class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Облик"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Облик" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Облик</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_bg.wikipedia.org&uselang=bg" class=""><span>Направете дарение</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A1%D1%8A%D0%B7%D0%B4%D0%B0%D0%B2%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D1%81%D0%BC%D0%B5%D1%82%D0%BA%D0%B0&returnto=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD+%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&returntoquery=veaction%3Dedit%26redirect%3Dno" title="Насърчаваме Ви да си създадете сметка и да влезете, въпреки че не е задължително." class=""><span>Създаване на сметка</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A0%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%B8%D0%BB%D0%B8_%D0%B2%D0%BB%D0%B8%D0%B7%D0%B0%D0%BD%D0%B5&returnto=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD+%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&returntoquery=veaction%3Dedit%26redirect%3Dno" title="Препоръчваме Ви да влезете, въпреки, че не е задължително. [o]" accesskey="o" class=""><span>Влизане</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Допълнителни опции" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Лични инструменти" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Лични инструменти</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Потребителско меню" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_bg.wikipedia.org&uselang=bg"><span>Направете дарение</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A1%D1%8A%D0%B7%D0%B4%D0%B0%D0%B2%D0%B0%D0%BD%D0%B5_%D0%BD%D0%B0_%D1%81%D0%BC%D0%B5%D1%82%D0%BA%D0%B0&returnto=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD+%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&returntoquery=veaction%3Dedit%26redirect%3Dno" title="Насърчаваме Ви да си създадете сметка и да влезете, въпреки че не е задължително."><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Създаване на сметка</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%A0%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B8%D1%80%D0%B0%D0%BD%D0%B5_%D0%B8%D0%BB%D0%B8_%D0%B2%D0%BB%D0%B8%D0%B7%D0%B0%D0%BD%D0%B5&returnto=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD+%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&returntoquery=veaction%3Dedit%26redirect%3Dno" title="Препоръчваме Ви да влезете, въпреки, че не е задължително. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Влизане</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Страници за излезли от системата редактори <a href="/wiki/%D0%9F%D0%BE%D0%BC%D0%BE%D1%89:%D0%92%D1%8A%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5" aria-label="Научете повече за редактирането"><span>научете повече</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9C%D0%BE%D0%B8%D1%82%D0%B5_%D0%BF%D1%80%D0%B8%D0%BD%D0%BE%D1%81%D0%B8" title="Списък на промените, направени от този IP адрес [y]" accesskey="y"><span>Приноси</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9C%D0%BE%D1%8F%D1%82%D0%B0_%D0%B1%D0%B5%D1%81%D0%B5%D0%B4%D0%B0" title="Дискусия относно редакциите от този адрес [n]" accesskey="n"><span>Беседа</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Сайт"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Съдържание" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Съдържание</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">преместване към страничната лента</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">скриване</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Начало</div> </a> </li> <li id="toc-Връзка_между_звезден_и_синодичен_период" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Връзка_между_звезден_и_синодичен_период"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Връзка между звезден и синодичен период</span> </div> </a> <ul id="toc-Връзка_между_звезден_и_синодичен_период-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Изчисления" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Изчисления"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Изчисления</span> </div> </a> <button aria-controls="toc-Изчисления-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Превключване на подраздел Изчисления</span> </button> <ul id="toc-Изчисления-sublist" class="vector-toc-list"> <li id="toc-Тяло_с_незначителна_маса_на_орбита_около_масивно_централно_тяло" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Тяло_с_незначителна_маса_на_орбита_около_масивно_централно_тяло"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Тяло с незначителна маса на орбита около масивно централно тяло</span> </div> </a> <ul id="toc-Тяло_с_незначителна_маса_на_орбита_около_масивно_централно_тяло-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Две_тела_със_сравними_маси" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Две_тела_със_сравними_маси"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Две тела със сравними маси</span> </div> </a> <ul id="toc-Две_тела_със_сравними_маси-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Вижте_също" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Вижте_също"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Вижте също</span> </div> </a> <ul id="toc-Вижте_също-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Източници" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Източници"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Източници</span> </div> </a> <ul id="toc-Източници-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="Съдържание" 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="Скриване/показване на съдържанието" > <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">Скриване/показване на съдържанието</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">Орбитален период</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="Към статията на друг език. Налична на 73 езика" > <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-73" 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">73 езика</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Umlaufzeit" title="Umlaufzeit – швейцарски немски" lang="gsw" hreflang="gsw" data-title="Umlaufzeit" data-language-autonym="Alemannisch" data-language-local-name="швейцарски немски" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Periodo_orbital" title="Periodo orbital – арагонски" lang="an" hreflang="an" data-title="Periodo orbital" data-language-autonym="Aragonés" data-language-local-name="арагонски" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-anp mw-list-item"><a href="https://anp.wikipedia.org/wiki/%E0%A4%95%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%80%E0%A4%AF_%E0%A4%85%E0%A4%B5%E0%A4%A7%E0%A4%BF" title="कक्षीय अवधि – ангика" lang="anp" hreflang="anp" data-title="कक्षीय अवधि" data-language-autonym="अंगिका" data-language-local-name="ангика" class="interlanguage-link-target"><span>अंगिका</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AF%D9%88%D8%B1_%D9%85%D8%AF%D8%A7%D8%B1%D9%8A" title="دور مداري – арабски" lang="ar" hreflang="ar" data-title="دور مداري" data-language-autonym="العربية" data-language-local-name="арабски" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Periodu_orbital" title="Periodu orbital – астурски" lang="ast" hreflang="ast" data-title="Periodu orbital" data-language-autonym="Asturianu" data-language-local-name="астурски" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Orbital_d%C3%B6vr" title="Orbital dövr – азербайджански" lang="az" hreflang="az" data-title="Orbital dövr" data-language-autonym="Azərbaycanca" data-language-local-name="азербайджански" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%95%E0%A6%95%E0%A7%8D%E0%A6%B7%E0%A7%80%E0%A6%AF%E0%A6%BC_%E0%A6%AA%E0%A6%B0%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%AF%E0%A6%BC%E0%A6%95%E0%A6%BE%E0%A6%B2" title="কক্ষীয় পর্যায়কাল – бенгалски" lang="bn" hreflang="bn" data-title="কক্ষীয় পর্যায়কাল" data-language-autonym="বাংলা" data-language-local-name="бенгалски" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Orbitalni_period" title="Orbitalni period – босненски" lang="bs" hreflang="bs" data-title="Orbitalni period" data-language-autonym="Bosanski" data-language-local-name="босненски" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Per%C3%ADode_orbital" title="Període orbital – каталонски" lang="ca" hreflang="ca" data-title="Període orbital" data-language-autonym="Català" data-language-local-name="каталонски" 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/Doba_ob%C4%9Bhu" title="Doba oběhu – чешки" lang="cs" hreflang="cs" data-title="Doba oběhu" data-language-autonym="Čeština" data-language-local-name="чешки" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Siderisk_tid" title="Siderisk tid – датски" lang="da" hreflang="da" data-title="Siderisk tid" data-language-autonym="Dansk" data-language-local-name="датски" 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/Umlaufzeit" title="Umlaufzeit – немски" lang="de" hreflang="de" data-title="Umlaufzeit" data-language-autonym="Deutsch" data-language-local-name="немски" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A0%CE%B5%CF%81%CE%AF%CE%BF%CE%B4%CE%BF%CF%82_%CF%80%CE%B5%CF%81%CE%B9%CF%86%CE%BF%CF%81%CE%AC%CF%82" title="Περίοδος περιφοράς – гръцки" lang="el" hreflang="el" data-title="Περίοδος περιφοράς" data-language-autonym="Ελληνικά" data-language-local-name="гръцки" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Orbital_period" title="Orbital period – английски" lang="en" hreflang="en" data-title="Orbital period" data-language-autonym="English" data-language-local-name="английски" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Orbita_periodo" title="Orbita periodo – есперанто" lang="eo" hreflang="eo" data-title="Orbita periodo" data-language-autonym="Esperanto" data-language-local-name="есперанто" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Per%C3%ADodo_orbital" title="Período orbital – испански" lang="es" hreflang="es" data-title="Período orbital" data-language-autonym="Español" data-language-local-name="испански" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Sideeriline_periood" title="Sideeriline periood – естонски" lang="et" hreflang="et" data-title="Sideeriline periood" data-language-autonym="Eesti" data-language-local-name="естонски" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Orbita-periodo" title="Orbita-periodo – баски" lang="eu" hreflang="eu" data-title="Orbita-periodo" data-language-autonym="Euskara" data-language-local-name="баски" 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/%D8%AA%D9%86%D8%A7%D9%88%D8%A8_%D9%85%D8%AF%D8%A7%D8%B1%DB%8C" title="تناوب مداری – персийски" lang="fa" hreflang="fa" data-title="تناوب مداری" data-language-autonym="فارسی" data-language-local-name="персийски" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kiertoaika" title="Kiertoaika – фински" lang="fi" hreflang="fi" data-title="Kiertoaika" data-language-autonym="Suomi" data-language-local-name="фински" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/P%C3%A9riode_de_r%C3%A9volution" title="Période de révolution – френски" lang="fr" hreflang="fr" data-title="Période de révolution" data-language-autonym="Français" data-language-local-name="френски" 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/Tr%C3%A9imhse_fhithiseach" title="Tréimhse fhithiseach – ирландски" lang="ga" hreflang="ga" data-title="Tréimhse fhithiseach" data-language-autonym="Gaeilge" data-language-local-name="ирландски" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Per%C3%ADodo_orbital" title="Período orbital – галисийски" lang="gl" hreflang="gl" data-title="Período orbital" data-language-autonym="Galego" data-language-local-name="галисийски" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%96%D7%9E%D7%9F_%D7%94%D7%A7%D7%A4%D7%94" title="זמן הקפה – иврит" lang="he" hreflang="he" data-title="זמן הקפה" data-language-autonym="עברית" data-language-local-name="иврит" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%95%E0%A4%95%E0%A5%8D%E0%A4%B7%E0%A5%80%E0%A4%AF_%E0%A4%85%E0%A4%B5%E0%A4%A7%E0%A4%BF" title="कक्षीय अवधि – хинди" lang="hi" hreflang="hi" data-title="कक्षीय अवधि" data-language-autonym="हिन्दी" data-language-local-name="хинди" 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/Ophodno_vrijeme" title="Ophodno vrijeme – хърватски" lang="hr" hreflang="hr" data-title="Ophodno vrijeme" data-language-autonym="Hrvatski" data-language-local-name="хърватски" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Kering%C3%A9si_id%C5%91" title="Keringési idő – унгарски" lang="hu" hreflang="hu" data-title="Keringési idő" data-language-autonym="Magyar" data-language-local-name="унгарски" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8D%D5%AB%D5%A4%D5%A5%D6%80%D5%AB%D5%AF_%D5%BA%D5%A1%D6%80%D5%A2%D5%A5%D6%80%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Սիդերիկ պարբերություն – арменски" lang="hy" hreflang="hy" data-title="Սիդերիկ պարբերություն" data-language-autonym="Հայերեն" data-language-local-name="арменски" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Periode_orbit" title="Periode orbit – индонезийски" lang="id" hreflang="id" data-title="Periode orbit" data-language-autonym="Bahasa Indonesia" data-language-local-name="индонезийски" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/Oge_Orbital" title="Oge Orbital – игбо" lang="ig" hreflang="ig" data-title="Oge Orbital" data-language-autonym="Igbo" data-language-local-name="игбо" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Periodo_di_rivoluzione" title="Periodo di rivoluzione – италиански" lang="it" hreflang="it" data-title="Periodo di rivoluzione" data-language-autonym="Italiano" data-language-local-name="италиански" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%85%AC%E8%BB%A2%E5%91%A8%E6%9C%9F" title="公転周期 – японски" lang="ja" hreflang="ja" data-title="公転周期" data-language-autonym="日本語" data-language-local-name="японски" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9D%E1%83%A0%E1%83%91%E1%83%98%E1%83%A2%E1%83%90%E1%83%9A%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%9E%E1%83%94%E1%83%A0%E1%83%98%E1%83%9D%E1%83%93%E1%83%98" title="ორბიტალური პერიოდი – грузински" lang="ka" hreflang="ka" data-title="ორბიტალური პერიოდი" data-language-autonym="ქართული" data-language-local-name="грузински" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Tallit_tamezzayt" title="Tallit tamezzayt – кабилски" lang="kab" hreflang="kab" data-title="Tallit tamezzayt" data-language-autonym="Taqbaylit" data-language-local-name="кабилски" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B3%B5%EC%A0%84_%EC%A3%BC%EA%B8%B0" title="공전 주기 – корейски" lang="ko" hreflang="ko" data-title="공전 주기" data-language-autonym="한국어" data-language-local-name="корейски" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A1%D0%B8%D0%B4%D0%B5%D1%80%D0%B8%D0%BA%D0%B0%D0%BB%D1%8B%D0%BA_%D0%BC%D0%B5%D0%B7%D0%B3%D0%B8%D0%BB" title="Сидерикалык мезгил – киргизки" lang="ky" hreflang="ky" data-title="Сидерикалык мезгил" data-language-autonym="Кыргызча" data-language-local-name="киргизки" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Periodus_orbitalis" title="Periodus orbitalis – латински" lang="la" hreflang="la" data-title="Periodus orbitalis" data-language-autonym="Latina" data-language-local-name="латински" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/%C3%8Bmlafz%C3%A4it" title="Ëmlafzäit – люксембургски" lang="lb" hreflang="lb" data-title="Ëmlafzäit" data-language-autonym="Lëtzebuergesch" data-language-local-name="люксембургски" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/%C5%BDvaig%C5%BEdinis_periodas" title="Žvaigždinis periodas – литовски" lang="lt" hreflang="lt" data-title="Žvaigždinis periodas" data-language-autonym="Lietuvių" data-language-local-name="литовски" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Apri%C5%86%C4%B7ojuma_periods" title="Apriņķojuma periods – латвийски" lang="lv" hreflang="lv" data-title="Apriņķojuma periods" data-language-autonym="Latviešu" data-language-local-name="латвийски" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4" title="Орбитален период – македонски" lang="mk" hreflang="mk" data-title="Орбитален период" data-language-autonym="Македонски" data-language-local-name="македонски" 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%AA%E0%A4%B0%E0%A4%BF%E0%A4%AD%E0%A5%8D%E0%A4%B0%E0%A4%AE%E0%A4%A3_%E0%A4%95%E0%A4%BE%E0%A4%B3" title="परिभ्रमण काळ – марати" lang="mr" hreflang="mr" data-title="परिभ्रमण काळ" data-language-autonym="मराठी" data-language-local-name="марати" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Tempoh_orbit" title="Tempoh orbit – малайски" lang="ms" hreflang="ms" data-title="Tempoh orbit" data-language-autonym="Bahasa Melayu" data-language-local-name="малайски" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/%C3%9Cmlooptiet" title="Ümlooptiet – долнонемски" lang="nds" hreflang="nds" data-title="Ümlooptiet" data-language-autonym="Plattdüütsch" data-language-local-name="долнонемски" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Omlooptijd_(astronomie)" title="Omlooptijd (astronomie) – нидерландски" lang="nl" hreflang="nl" data-title="Omlooptijd (astronomie)" data-language-autonym="Nederlands" data-language-local-name="нидерландски" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Baneperiode" title="Baneperiode – норвежки (нюношк)" lang="nn" hreflang="nn" data-title="Baneperiode" data-language-autonym="Norsk nynorsk" data-language-local-name="норвежки (нюношк)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Oml%C3%B8pstid" title="Omløpstid – норвежки (букмол)" lang="nb" hreflang="nb" data-title="Omløpstid" data-language-autonym="Norsk bokmål" data-language-local-name="норвежки (букмол)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Peri%C3%B2de_de_revolucion" title="Periòde de revolucion – окситански" lang="oc" hreflang="oc" data-title="Periòde de revolucion" data-language-autonym="Occitan" data-language-local-name="окситански" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Okres_orbitalny" title="Okres orbitalny – полски" lang="pl" hreflang="pl" data-title="Okres orbitalny" data-language-autonym="Polski" data-language-local-name="полски" 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/Per%C3%ADodo_orbital" title="Período orbital – португалски" lang="pt" hreflang="pt" data-title="Período orbital" data-language-autonym="Português" data-language-local-name="португалски" 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/Perioad%C4%83_sinodic%C4%83" title="Perioadă sinodică – румънски" lang="ro" hreflang="ro" data-title="Perioadă sinodică" data-language-autonym="Română" data-language-local-name="румънски" 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%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4" title="Орбитальный период – руски" lang="ru" hreflang="ru" data-title="Орбитальный период" data-language-autonym="Русский" data-language-local-name="руски" 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/Piriudu_di_rivuluzzioni" title="Piriudu di rivuluzzioni – сицилиански" lang="scn" hreflang="scn" data-title="Piriudu di rivuluzzioni" data-language-autonym="Sicilianu" data-language-local-name="сицилиански" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Orbitalni_period" title="Orbitalni period – сърбохърватски" lang="sh" hreflang="sh" data-title="Orbitalni period" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="сърбохърватски" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%9A%E0%B6%9A%E0%B7%8A%E0%B7%82%E0%B7%93%E0%B6%BA_%E0%B6%9A%E0%B7%8F%E0%B6%BD%E0%B7%8F%E0%B7%80%E0%B6%BB%E0%B7%8A%E0%B6%AD%E0%B6%BA" title="කක්ෂීය කාලාවර්තය – синхалски" lang="si" hreflang="si" data-title="කක්ෂීය කාලාවර්තය" data-language-autonym="සිංහල" data-language-local-name="синхалски" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Orbital_period" title="Orbital period – Simple English" lang="en-simple" hreflang="en-simple" data-title="Orbital period" 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/Obe%C5%BEn%C3%A1_doba_(astron%C3%B3mia)" title="Obežná doba (astronómia) – словашки" lang="sk" hreflang="sk" data-title="Obežná doba (astronómia)" data-language-autonym="Slovenčina" data-language-local-name="словашки" 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/Orbitalna_perioda" title="Orbitalna perioda – словенски" lang="sl" hreflang="sl" data-title="Orbitalna perioda" data-language-autonym="Slovenščina" data-language-local-name="словенски" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Periudha_orbitale" title="Periudha orbitale – албански" lang="sq" hreflang="sq" data-title="Periudha orbitale" data-language-autonym="Shqip" data-language-local-name="албански" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%BD%D0%B8_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4" title="Орбитални период – сръбски" lang="sr" hreflang="sr" data-title="Орбитални период" data-language-autonym="Српски / srpski" data-language-local-name="сръбски" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Siderisk_omloppstid" title="Siderisk omloppstid – шведски" lang="sv" hreflang="sv" data-title="Siderisk omloppstid" data-language-autonym="Svenska" data-language-local-name="шведски" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Kipindi_cha_mzunguko" title="Kipindi cha mzunguko – суахили" lang="sw" hreflang="sw" data-title="Kipindi cha mzunguko" data-language-autonym="Kiswahili" data-language-local-name="суахили" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-szl mw-list-item"><a href="https://szl.wikipedia.org/wiki/%C3%94kres_%C3%B4rbitalny" title="Ôkres ôrbitalny – Silesian" lang="szl" hreflang="szl" data-title="Ôkres ôrbitalny" data-language-autonym="Ślůnski" data-language-local-name="Silesian" class="interlanguage-link-target"><span>Ślůnski</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%9A%E0%AF%81%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AF%81%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AE%BE%E0%AE%B2%E0%AE%AE%E0%AF%8D" title="சுற்றுக்காலம் – тамилски" lang="ta" hreflang="ta" data-title="சுற்றுக்காலம்" data-language-autonym="தமிழ்" data-language-local-name="тамилски" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%95%E0%B0%95%E0%B1%8D%E0%B0%B7%E0%B1%8D%E0%B0%AF%E0%B0%BE_%E0%B0%B5%E0%B1%8D%E0%B0%AF%E0%B0%B5%E0%B0%A7%E0%B0%BF" title="కక్ష్యా వ్యవధి – телугу" lang="te" hreflang="te" data-title="కక్ష్యా వ్యవధి" data-language-autonym="తెలుగు" data-language-local-name="телугу" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%84%E0%B8%B2%E0%B8%9A%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%82%E0%B8%84%E0%B8%88%E0%B8%A3" title="คาบการโคจร – тайски" lang="th" hreflang="th" data-title="คาบการโคจร" data-language-autonym="ไทย" data-language-local-name="тайски" 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/Y%C3%B6r%C3%BCnge_periyodu" title="Yörünge periyodu – турски" lang="tr" hreflang="tr" data-title="Yörünge periyodu" data-language-autonym="Türkçe" data-language-local-name="турски" 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%9E%D1%80%D0%B1%D1%96%D1%82%D0%B0%D0%BB%D1%8C%D0%BD%D0%B8%D0%B9_%D0%BF%D0%B5%D1%80%D1%96%D0%BE%D0%B4" title="Орбітальний період – украински" lang="uk" hreflang="uk" data-title="Орбітальний період" data-language-autonym="Українська" data-language-local-name="украински" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Orbital_davr" title="Orbital davr – узбекски" lang="uz" hreflang="uz" data-title="Orbital davr" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="узбекски" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Chu_k%E1%BB%B3_qu%E1%BB%B9_%C4%91%E1%BA%A1o" title="Chu kỳ quỹ đạo – виетнамски" lang="vi" hreflang="vi" data-title="Chu kỳ quỹ đạo" data-language-autonym="Tiếng Việt" data-language-local-name="виетнамски" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E8%BD%A8%E9%81%93%E5%91%A8%E6%9C%9F" title="轨道周期 – ву китайски" lang="wuu" hreflang="wuu" data-title="轨道周期" data-language-autonym="吴语" data-language-local-name="ву китайски" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%BD%A8%E9%81%93%E5%91%A8%E6%9C%9F" title="轨道周期 – китайски" lang="zh" hreflang="zh" data-title="轨道周期" data-language-autonym="中文" data-language-local-name="китайски" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%BB%8C%E9%81%93%E9%80%B1%E6%9C%9F" title="軌道週期 – кантонски" lang="yue" hreflang="yue" data-title="軌道週期" data-language-autonym="粵語" data-language-local-name="кантонски" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q37640#sitelinks-wikipedia" title="Редактиране на междуезиковите препратки" class="wbc-editpage">Редактиране</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Именни пространства"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4" title="Преглед на основната страница [c]" accesskey="c"><span>Статия</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=%D0%91%D0%B5%D1%81%D0%B5%D0%B4%D0%B0:%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&redlink=1" rel="discussion" class="new" title="Беседа за страницата (страницата не съществува) [t]" accesskey="t"><span>Беседа</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Промяна на езиковия вариант" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">български</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Прегледи"> <div id="p-views" class="vector-menu vector-menu-tabs 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href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=history" title="Предишни версии на страницата [h]" accesskey="h"><span>История</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Инструменти" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Инструменти</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Инструменти</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">преместване към страничната лента</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">скриване</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Допълнителни опции" > <div class="vector-menu-heading"> Действия </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4"><span>Преглед</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit" title="Редактиране на страницата [v]" accesskey="v"><span>Редактиране</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit" title="Редактиране на изходния код на страницата [e]" accesskey="e"><span>Редактиране на 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class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Облик</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">преместване към страничната лента</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">скриване</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">от Уикипедия, свободната енциклопедия</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="bg" dir="ltr"><p><b>Орбиталният период</b> е времето, необходимо на дадено <a href="/wiki/%D0%9D%D0%B5%D0%B1%D0%B5%D1%81%D0%BD%D0%BE_%D1%82%D1%8F%D0%BB%D0%BE" class="mw-redirect" title="Небесно тяло">небесно тяло</a> да извърши пълно завъртане по своята <a href="/wiki/%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0" title="Орбита">орбита</a>. За обекти в <a href="/wiki/%D0%A5%D0%B5%D0%BB%D0%B8%D0%BE%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B8%D1%87%D0%BD%D0%B0_%D0%BE%D1%80%D0%B1%D0%B8%D1%82%D0%B0" title="Хелиоцентрична орбита">хелиоцентрична орбита</a> се различават следните категории орбити: </p> <ul><li><b>Звезден период</b> (<b>звездна година</b>) – времето, необходимо на обекта за извършване на пълно завъртане около главното тяло спрямо звездите. Този период се счита за истинския орбитален период. Времето за едно пълно завъртане около <a href="/wiki/%D0%A1%D0%BB%D1%8A%D0%BD%D1%86%D0%B5" title="Слънце">Слънцето</a> се нарича <b>сидеричен период</b> или <b>сидерична година</b>.</li> <li><b>Синодичен период</b> – времетраенето между явявания на обекта на една и съща позиция в небето спрямо Слънцето при наземни наблюдения. Например, интервалът от време между две последователни „съединявания“ на <a href="/wiki/%D0%9B%D1%83%D0%BD%D0%B0%D1%82%D0%B0" class="mw-redirect" title="Луната">Луната</a> или някоя планета от Слънчевата система със Слънцето, когато се наблюдава от Земята. Отличава се от звездния период поради факта, че <a href="/wiki/%D0%97%D0%B5%D0%BC%D1%8F%D1%82%D0%B0" class="mw-redirect" title="Земята">Земята</a> се движи по своята орбита около Слънцето.</li> <li><b>Драконов период</b> (<b>са́рос</b>) е времетраенето между две последователни пресичания на <a href="/w/index.php?title=%D0%92%D1%8A%D0%B7%D1%85%D0%BE%D0%B4%D1%8F%D1%89_%D0%B2%D1%8A%D0%B7%D0%B5%D0%BB&action=edit&redlink=1" class="new" title="Възходящ възел (страницата не съществува)">възходящия възел</a>. Отличава се от звездния период, защото за <a href="/w/index.php?title=%D0%9F%D1%80%D0%B0%D0%B2%D0%B0_%D0%BD%D0%B0_%D0%B2%D1%8A%D0%B7%D0%BB%D0%B8%D1%82%D0%B5&action=edit&redlink=1" class="new" title="Права на възлите (страницата не съществува)">правата на възлите</a> е типична бавната <a href="/wiki/%D0%9F%D1%80%D0%B5%D1%86%D0%B5%D1%81%D0%B8%D1%8F" title="Прецесия">прецесия</a> или <a href="/wiki/%D0%A0%D0%B5%D1%86%D0%B5%D1%81%D0%B8%D1%8F" title="Рецесия">рецесия</a>. За Луната той е 223 <a href="/w/index.php?title=%D0%A1%D0%B8%D0%BD%D0%BE%D0%B4%D0%B8%D1%87%D0%B5%D0%BD_%D0%BB%D1%83%D0%BD%D0%B5%D0%BD_%D0%BC%D0%B5%D1%81%D0%B5%D1%86&action=edit&redlink=1" class="new" title="Синодичен лунен месец (страницата не съществува)">синодични месеца</a> (средно приблизително 6585,3211 дни или 18,03 тропически години), след което затъмненията на Луната и Слънцето се повтарят приблизително в същия ред. В края на всеки сарос относителните позиции и скорости на телата в системата Земя–Луна–Слънце се повтарят с много висока точност.</li> <li><b>Аномалистичен период</b> е времетраенето между два последователни <a href="/wiki/%D0%9F%D0%B5%D1%80%D0%B8%D1%85%D0%B5%D0%BB%D0%B8%D0%B9" class="mw-redirect" title="Перихелий">перихелия</a> на обекта. Отличава се от звездния период поради прецесия или рецесия на <a href="/wiki/%D0%93%D0%BE%D0%BB%D1%8F%D0%BC%D0%B0_%D0%BF%D0%BE%D0%BB%D1%83%D0%BE%D1%81" title="Голяма полуос">голямата полуос</a> на елипсовидната орбита. Например, аномалистичният период на Земята е 365,25964 дни, на Луната е 27,55455 дни.</li> <li><b>Тропически период</b> е времетраенето между две последователни позиции с <a href="/wiki/%D0%A0%D0%B5%D0%BA%D1%82%D0%B0%D1%81%D1%86%D0%B5%D0%BD%D0%B7%D0%B8%D1%8F" title="Ректасцензия">ректасцензия</a> от нула градуса. Това е продължителността на времето, през което Слънцето завършва един цикъл от сезони, както се вижда от Земята, като например времето от едно пролетно равноденствие до следващо или от един ден от лятното слънцестоене до следващия. По-кратък е от звездния период поради прецесията на точката на пролетното <a href="/wiki/%D0%A0%D0%B0%D0%B2%D0%BD%D0%BE%D0%B4%D0%B5%D0%BD%D1%81%D1%82%D0%B2%D0%B8%D0%B5" title="Равноденствие">равноденствие</a>.</li></ul> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Връзка_между_звезден_и_синодичен_период"><span id=".D0.92.D1.80.D1.8A.D0.B7.D0.BA.D0.B0_.D0.BC.D0.B5.D0.B6.D0.B4.D1.83_.D0.B7.D0.B2.D0.B5.D0.B7.D0.B4.D0.B5.D0.BD_.D0.B8_.D1.81.D0.B8.D0.BD.D0.BE.D0.B4.D0.B8.D1.87.D0.B5.D0.BD_.D0.BF.D0.B5.D1.80.D0.B8.D0.BE.D0.B4"></span>Връзка между звезден и синодичен период</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=1" title="Редактиране на раздел: Връзка между звезден и синодичен период" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=1" title="Edit section's source code: Връзка между звезден и синодичен период"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/%D0%9D%D0%B8%D0%BA%D0%BE%D0%BB%D0%B0%D0%B9_%D0%9A%D0%BE%D0%BF%D0%B5%D1%80%D0%BD%D0%B8%D0%BA" title="Николай Коперник">Николай Коперник</a> първи извежда формула за изчисление на звездния период на дадена <a href="/wiki/%D0%9F%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0" title="Планета">планета</a> спрямо нейния синодичен период. </p><p>Нека </p> <dl><dd><i><b>E</b></i> е звездният период на Земята (звездна година),</dd> <dd><i><b>P</b></i> е звездният период на другата планета,</dd> <dd><i><b>S</b></i> е синодичният период на другата планета спрямо Земята.</dd></dl> <p>В случай че Земята е по-отдалечена от Слънцето спрямо другата планета, то: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle P={\frac {1}{{\frac {1}{E}}+{\frac {1}{S}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>P</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mrow> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>E</mi> </mfrac> </mrow> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>S</mi> </mfrac> </mrow> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle P={\frac {1}{{\frac {1}{E}}+{\frac {1}{S}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f7213ee745dccc5fcaeb64c4f3a01a76d8578e87" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.505ex; width:12.508ex; height:6.843ex;" alt="{\displaystyle P={\frac {1}{{\frac {1}{E}}+{\frac {1}{S}}}}}"></span></dd></dl> <p>В противен случай: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle P={\frac {1}{{\frac {1}{E}}-{\frac {1}{S}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>P</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mrow> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>E</mi> </mfrac> </mrow> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>1</mn> <mi>S</mi> </mfrac> </mrow> </mrow> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle P={\frac {1}{{\frac {1}{E}}-{\frac {1}{S}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/5fafb897d4355e69e47f5bbc9bc740f96d244f22" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.505ex; width:12.508ex; height:6.843ex;" alt="{\displaystyle P={\frac {1}{{\frac {1}{E}}-{\frac {1}{S}}}}}"></span></dd></dl> <p>Таблица на звездните и синодичните периоди на по-масивните тела в Слънчевата система спрямо Земята: </p> <figure typeof="mw:File/Thumb"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Solar_system_orbital_period_vs_semimajor_axis.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/Solar_system_orbital_period_vs_semimajor_axis.svg/280px-Solar_system_orbital_period_vs_semimajor_axis.svg.png" decoding="async" width="280" height="280" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/Solar_system_orbital_period_vs_semimajor_axis.svg/420px-Solar_system_orbital_period_vs_semimajor_axis.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/be/Solar_system_orbital_period_vs_semimajor_axis.svg/560px-Solar_system_orbital_period_vs_semimajor_axis.svg.png 2x" data-file-width="512" data-file-height="512" /></a><figcaption>Орбитални периоди на Слънчевата система спрямо голямата полуос на орбитата</figcaption></figure> <table> <tbody><tr> <td> </td> <td><b>Звезден период</b><br />(<a href="/wiki/%D0%AE%D0%BB%D0%B8%D0%B0%D0%BD%D1%81%D0%BA%D0%B0_%D0%B3%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0" class="mw-redirect" title="Юлианска година">години</a>) </td> <td><b>Синодичен период</b><br />(години) </td> <td><b>Синодичен период</b><br />(<a href="/wiki/%D0%94%D0%B5%D0%BD" title="Ден">дни</a>) </td></tr> <tr> <td><a href="/wiki/%D0%9C%D0%B5%D1%80%D0%BA%D1%83%D1%80%D0%B8%D0%B9_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Меркурий (планета)">Меркурий</a> </td> <td>0,241 </td> <td>0,317 </td> <td>115,9 </td></tr> <tr> <td><a href="/wiki/%D0%92%D0%B5%D0%BD%D0%B5%D1%80%D0%B0_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Венера (планета)">Венера</a> </td> <td>0,615 </td> <td>1,599 </td> <td>583,9 </td></tr> <tr> <td><a href="/wiki/%D0%97%D0%B5%D0%BC%D1%8F_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" class="mw-redirect" title="Земя (планета)">Земя</a> </td> <td><b>1</b> </td> <td>— </td> <td>— </td></tr> <tr> <td><a href="/wiki/%D0%9B%D1%83%D0%BD%D0%B0" title="Луна">Луна</a> </td> <td>0,0748 </td> <td>0,0809 </td> <td>29,5306 </td></tr> <tr> <td><a href="/wiki/%D0%9C%D0%B0%D1%80%D1%81_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" class="mw-redirect" title="Марс (планета)">Марс</a> </td> <td>1,881 </td> <td>2,135 </td> <td>780,0 </td></tr> <tr> <td><a href="/wiki/1_%D0%A6%D0%B5%D1%80%D0%B5%D1%80%D0%B0" class="mw-redirect" title="1 Церера">1 Церера</a> </td> <td>4,600 </td> <td>1,278 </td> <td>466,7 </td></tr> <tr> <td><a href="/wiki/%D0%AE%D0%BF%D0%B8%D1%82%D0%B5%D1%80_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Юпитер (планета)">Юпитер</a> </td> <td>11,87 </td> <td>1,092 </td> <td>398,9 </td></tr> <tr> <td><a href="/wiki/%D0%A1%D0%B0%D1%82%D1%83%D1%80%D0%BD_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Сатурн (планета)">Сатурн</a> </td> <td>29,45 </td> <td>1,035 </td> <td>378,1 </td></tr> <tr> <td><a href="/wiki/%D0%A3%D1%80%D0%B0%D0%BD_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Уран (планета)">Уран</a> </td> <td>84,07 </td> <td>1,012 </td> <td>369,7 </td></tr> <tr> <td><a href="/wiki/%D0%9D%D0%B5%D0%BF%D1%82%D1%83%D0%BD_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0)" title="Нептун (планета)">Нептун</a> </td> <td>164,9 </td> <td>1,006 </td> <td>367,5 </td></tr> <tr> <td><a href="/wiki/%D0%9F%D0%BB%D1%83%D1%82%D0%BE%D0%BD_(%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0-%D0%B4%D0%B6%D1%83%D0%B4%D0%B6%D0%B5)" class="mw-redirect" title="Плутон (планета-джудже)">Плутон</a> </td> <td>248,1 </td> <td>1,004 </td> <td>366,7 </td></tr></tbody></table> <p><br />На фигурата е изобразена логаритмична графика на зависимостта на орбиталните периоди <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/476a8389064c06ab89963a2467aef525838da0cf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.023ex; height:2.176ex;" alt="{\displaystyle T\,}"></span> (в земни години) от голямата полуос <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span> (средна стойност на <a href="/wiki/%D0%90%D1%84%D0%B5%D0%BB%D0%B8%D0%B9" class="mw-redirect" title="Афелий">афелия</a> и <a href="/wiki/%D0%9F%D0%B5%D1%80%D0%B8%D1%85%D0%B5%D0%BB%D0%B8%D0%B9" class="mw-redirect" title="Перихелий">перихелия</a> в астрономически единици AU) на някои орбити от Слънчевата система. Кръстовете означават стойностите на <a href="/wiki/%D0%9A%D0%B5%D0%BF%D0%BB%D0%B5%D1%80" class="mw-redirect mw-disambig" title="Кеплер">Кеплер</a> и очертават правата зелена линия, което означава, че отношението <b><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span>³/<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/476a8389064c06ab89963a2467aef525838da0cf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.023ex; height:2.176ex;" alt="{\displaystyle T\,}"></span>²</b> е постоянно. </p> <div class="mw-heading mw-heading2"><h2 id="Изчисления"><span id=".D0.98.D0.B7.D1.87.D0.B8.D1.81.D0.BB.D0.B5.D0.BD.D0.B8.D1.8F"></span>Изчисления</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=2" title="Редактиране на раздел: Изчисления" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=2" title="Edit section's source code: Изчисления"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Тяло_с_незначителна_маса_на_орбита_около_масивно_централно_тяло"><span id=".D0.A2.D1.8F.D0.BB.D0.BE_.D1.81_.D0.BD.D0.B5.D0.B7.D0.BD.D0.B0.D1.87.D0.B8.D1.82.D0.B5.D0.BB.D0.BD.D0.B0_.D0.BC.D0.B0.D1.81.D0.B0_.D0.BD.D0.B0_.D0.BE.D1.80.D0.B1.D0.B8.D1.82.D0.B0_.D0.BE.D0.BA.D0.BE.D0.BB.D0.BE_.D0.BC.D0.B0.D1.81.D0.B8.D0.B2.D0.BD.D0.BE_.D1.86.D0.B5.D0.BD.D1.82.D1.80.D0.B0.D0.BB.D0.BD.D0.BE_.D1.82.D1.8F.D0.BB.D0.BE"></span>Тяло с незначителна маса на орбита около масивно централно тяло</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=3" title="Редактиране на раздел: Тяло с незначителна маса на орбита около масивно централно тяло" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=3" title="Edit section's source code: Тяло с незначителна маса на орбита около масивно централно тяло"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>В <a href="/wiki/%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%B4%D0%B8%D0%BD%D0%B0%D0%BC%D0%B8%D0%BA%D0%B0" class="mw-redirect" title="Астродинамика">астродинамиката</a> съгласно <a href="/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD%D0%B8_%D0%BD%D0%B0_%D0%9A%D0%B5%D0%BF%D0%BB%D0%B5%D1%80" title="Закони на Кеплер">третия закон на Кеплер</a>, <b>орбиталният период</b> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/476a8389064c06ab89963a2467aef525838da0cf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.023ex; height:2.176ex;" alt="{\displaystyle T\,}"></span> (в секунди) на елиптична или кръгова орбита на тяло с незначителна маса около масивно централно тяло е </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Ellipse_semi-major_and_minor_axes.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Ellipse_semi-major_and_minor_axes.svg/260px-Ellipse_semi-major_and_minor_axes.svg.png" decoding="async" width="260" height="159" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Ellipse_semi-major_and_minor_axes.svg/390px-Ellipse_semi-major_and_minor_axes.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a1/Ellipse_semi-major_and_minor_axes.svg/520px-Ellipse_semi-major_and_minor_axes.svg.png 2x" data-file-width="720" data-file-height="440" /></a><figcaption>Голяма (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span>) и малка (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle b\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>b</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle b\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4b1bcf19f4ec75b1d2cc0be001e58a314fb0a940" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.385ex; height:2.176ex;" alt="{\displaystyle b\,}"></span>) полуос на елипса</figcaption></figure> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T=2\pi {\sqrt {\frac {a^{3}}{\mu }}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mn>2</mn> <mi>π</mi> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mfrac> <msup> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> <mi>μ</mi> </mfrac> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T=2\pi {\sqrt {\frac {a^{3}}{\mu }}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/84a962a4e5da8183f6a38ef23d0a5a9452667148" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.171ex; width:12.673ex; height:7.676ex;" alt="{\displaystyle T=2\pi {\sqrt {\frac {a^{3}}{\mu }}}}"></span>,</dd></dl> <p>където: </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span> е дължината на <a href="/wiki/%D0%93%D0%BE%D0%BB%D1%8F%D0%BC%D0%B0_%D0%BF%D0%BE%D0%BB%D1%83%D0%BE%D1%81" title="Голяма полуос">голямата полуос</a> на елипсата в <a href="/wiki/%D0%9C%D0%B5%D1%82%D1%8A%D1%80" title="Метър">метри</a>;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mu =GM\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>μ</mi> <mo>=</mo> <mi>G</mi> <mi>M</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mu =GM\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a2adf61981adebba9e781cdc828d8ae17a3fa909" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:9.156ex; height:2.676ex;" alt="{\displaystyle \mu =GM\,}"></span> е (стандартен <a href="/w/index.php?title=%D0%93%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%B5%D0%BD_%D0%BF%D0%B0%D1%80%D0%B0%D0%BC%D0%B5%D1%82%D1%8A%D1%80&action=edit&redlink=1" class="new" title="Гравитационен параметър (страницата не съществува)">гравитационен параметър</a>); <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle G=\left(6,67428\pm 0,00067\right)\times 10^{-11}\ [{\mbox{m}}^{3}\ {\mbox{kg}}^{-1}\ {\mbox{s}}^{-2}]}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>G</mi> <mo>=</mo> <mrow> <mo>(</mo> <mrow> <mn>6</mn> <mo>,</mo> <mn>67428</mn> <mo>±</mo> <mn>0</mn> <mo>,</mo> <mn>00067</mn> </mrow> <mo>)</mo> </mrow> <mo>×</mo> <msup> <mn>10</mn> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>11</mn> </mrow> </msup> <mtext> </mtext> <mo stretchy="false">[</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>m</mtext> </mstyle> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> <mtext> </mtext> <msup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>kg</mtext> </mstyle> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> <mtext> </mtext> <msup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>s</mtext> </mstyle> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>2</mn> </mrow> </msup> <mo stretchy="false">]</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle G=\left(6,67428\pm 0,00067\right)\times 10^{-11}\ [{\mbox{m}}^{3}\ {\mbox{kg}}^{-1}\ {\mbox{s}}^{-2}]}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/29499b460fdeaaaf417f3cee6aa611f6e4d76af2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:47.91ex; height:3.176ex;" alt="{\displaystyle G=\left(6,67428\pm 0,00067\right)\times 10^{-11}\ [{\mbox{m}}^{3}\ {\mbox{kg}}^{-1}\ {\mbox{s}}^{-2}]}"></span> <br />e <a href="/wiki/%D0%93%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D0%B0_%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D0%B0%D0%BD%D1%82%D0%B0" title="Гравитационна константа">гравитационната константа</a>;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>M</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/aa66ea8156203e93f2dca12aca24538c2bdce761" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.829ex; height:2.176ex;" alt="{\displaystyle M\,}"></span> e масата на централното тяло в <a href="/wiki/%D0%9A%D0%B8%D0%BB%D0%BE%D0%B3%D1%80%D0%B0%D0%BC" title="Килограм">килограми</a>.</li></ul></li></ul> <p>За всички елипси с една и съща голяма полуос орбиталният период е един и същ, независимо от ексцентрицитета. </p><p>В случай на централно тяло със <a href="/wiki/%D0%A1%D1%84%D0%B5%D1%80%D0%B0" title="Сфера">сферична</a> <a href="/wiki/%D0%A1%D0%B8%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F" title="Симетрия">симетрия</a> и маса, равна на земната, се получава: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T=1,4{\sqrt {(a/R)^{3}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mn>1</mn> <mo>,</mo> <mn>4</mn> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mo stretchy="false">(</mo> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>R</mi> <msup> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T=1,4{\sqrt {(a/R)^{3}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/19a2e40dba1f550f779fc8f4f0ff552ac4efcc57" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.671ex; width:17.437ex; height:4.843ex;" alt="{\displaystyle T=1,4{\sqrt {(a/R)^{3}}}}"></span>,</dd></dl> <p>където <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/476a8389064c06ab89963a2467aef525838da0cf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.023ex; height:2.176ex;" alt="{\displaystyle T\,}"></span> е времетраенето в <a href="/wiki/%D0%A7%D0%B0%D1%81" title="Час">часове</a>, а <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle R\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>R</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle R\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/293563891196765d2d51e0dd54e1ae1000ba9def" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.151ex; height:2.176ex;" alt="{\displaystyle R\,}"></span> е радиусът на тялото. </p><p>За околослънчева орбита се получава: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T={\sqrt {a^{3}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <msup> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T={\sqrt {a^{3}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8073f9e9d38f6eaa5ff50e677b526ed022ce38a4" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:9.343ex; height:3.343ex;" alt="{\displaystyle T={\sqrt {a^{3}}}}"></span>,</dd></dl> <p>където <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/476a8389064c06ab89963a2467aef525838da0cf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.023ex; height:2.176ex;" alt="{\displaystyle T\,}"></span> е орбиталният период, измерен в земни години,<br /><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span> – дължината на голямата полуос в <a href="/wiki/%D0%90%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0_%D0%B5%D0%B4%D0%B8%D0%BD%D0%B8%D1%86%D0%B0" title="Астрономическа единица">астрономически единици</a>. </p><p>Обратно, формулата за изчисляване на разстоянието, на което тялото трябва да се върти, за да има даден орбитален период, е: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a={\sqrt[{3}]{\frac {GMT^{2}}{4\pi ^{2}}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mroot> <mfrac> <mrow> <mi>G</mi> <mi>M</mi> <msup> <mi>T</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mrow> <mrow> <mn>4</mn> <msup> <mi>π</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mrow> </mfrac> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </mroot> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a={\sqrt[{3}]{\frac {GMT^{2}}{4\pi ^{2}}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/acc0794d19344d83b82ba93518c68a0fccd0b31b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.005ex; width:14.531ex; height:7.509ex;" alt="{\displaystyle a={\sqrt[{3}]{\frac {GMT^{2}}{4\pi ^{2}}}}}"></span></dd></dl> <p>Например, малко тяло с маса 100 kg, за да извърши един оборот за 24 часа, трябва да се върти на разстояние 1,08 метра от центъра на масата си. </p><p>Когато сравнително малко тяло се движи по кръгова орбита и зависи от плътността на центъра на масата <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \rho }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>ρ</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \rho }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1f7d439671d1289b6a816e6af7a304be40608d64" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.202ex; height:2.176ex;" alt="{\displaystyle \rho }"></span> [kg / m³], орбиталният период се изчислява по формулата: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle T={\sqrt {\frac {3\pi }{G\rho }}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>T</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mfrac> <mrow> <mn>3</mn> <mi>π</mi> </mrow> <mrow> <mi>G</mi> <mi>ρ</mi> </mrow> </mfrac> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle T={\sqrt {\frac {3\pi }{G\rho }}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a4c7405ba72eb2b78be6b40722c5698e51163423" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.338ex; width:10.923ex; height:7.676ex;" alt="{\displaystyle T={\sqrt {\frac {3\pi }{G\rho }}}}"></span>.</dd></dl> <div class="mw-heading mw-heading3"><h3 id="Две_тела_със_сравними_маси"><span id=".D0.94.D0.B2.D0.B5_.D1.82.D0.B5.D0.BB.D0.B0_.D1.81.D1.8A.D1.81_.D1.81.D1.80.D0.B0.D0.B2.D0.BD.D0.B8.D0.BC.D0.B8_.D0.BC.D0.B0.D1.81.D0.B8"></span>Две тела със сравними маси</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=4" title="Редактиране на раздел: Две тела със сравними маси" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=4" title="Edit section's source code: Две тела със сравними маси"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>В <a href="/wiki/%D0%9D%D0%B5%D0%B1%D0%B5%D1%81%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D0%B8%D0%BA%D0%B0" title="Небесна механика">небесната механика</a>, когато двете тела на орбита имат сравними маси, техният взаимен орбитален период <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle P\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>P</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle P\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f60e07ebc2aadee94e4cbbccef71fd9bcf44f5f9" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.133ex; height:2.176ex;" alt="{\displaystyle P\,}"></span> може да се изчисли по формулата: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle P=2\pi {\sqrt {\frac {a^{3}}{G\left(M_{1}+M_{2}\right)}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>P</mi> <mo>=</mo> <mn>2</mn> <mi>π</mi> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mfrac> <msup> <mi>a</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> <mrow> <mi>G</mi> <mrow> <mo>(</mo> <mrow> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> <mo>+</mo> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> </mrow> <mo>)</mo> </mrow> </mrow> </mfrac> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle P=2\pi {\sqrt {\frac {a^{3}}{G\left(M_{1}+M_{2}\right)}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/2c5e2f1de453a47b56bfd713cc27cc001a225409" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -3.338ex; width:23.978ex; height:7.676ex;" alt="{\displaystyle P=2\pi {\sqrt {\frac {a^{3}}{G\left(M_{1}+M_{2}\right)}}}}"></span></dd></dl> <p>където: </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle a\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>a</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle a\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1d73aa5354c24942dab5316be466465a9d171510" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.617ex; height:1.676ex;" alt="{\displaystyle a\,}"></span> е сборът на големите полуоси на елипсите, които описват телата спрямо инертна <a href="/wiki/%D0%9E%D1%82%D0%BF%D1%80%D0%B0%D0%B2%D0%BD%D0%B0_%D1%81%D0%B8%D1%81%D1%82%D0%B5%D0%BC%D0%B0" title="Отправна система">отправна система</a>, или елипсата, описвана от първото тяло около второто срямо система с център второто тяло, равна на разстоянието между тях при кръгова орбита;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M_{1}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msub> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M_{1}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7a064e88465efc20221724f843b24ecd3c804f67" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:3.695ex; height:2.509ex;" alt="{\displaystyle M_{1}\,}"></span> и <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle M_{2}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>M</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msub> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle M_{2}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/bf3f7a325a00df0c95e1234aaf3d92984493363a" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:3.695ex; height:2.509ex;" alt="{\displaystyle M_{2}\,}"></span> са масите на двете тела;</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle G\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>G</mi> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle G\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a1f6c4d01b8be460cde4156d1fde6af720f8ff12" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.214ex; height:2.176ex;" alt="{\displaystyle G\,}"></span> е <a href="/wiki/%D0%93%D1%80%D0%B0%D0%B2%D0%B8%D1%82%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D0%B0_%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D0%B0%D0%BD%D1%82%D0%B0" title="Гравитационна константа">гравитационната константа</a>.</li></ul> <p>При <a href="/wiki/%D0%9F%D0%B0%D1%80%D0%B0%D0%B1%D0%BE%D0%BB%D0%B0" title="Парабола">параболични</a> и <a href="/wiki/%D0%A5%D0%B8%D0%BF%D0%B5%D1%80%D0%B1%D0%BE%D0%BB%D0%B0" title="Хипербола">хиперболични</a> траектории движението не е периодично – тялото само веднъж преминава през перихелий около фокуса; на теория, за пълно описване на параболична траектория е необходимо <a href="/wiki/%D0%91%D0%B5%D0%B7%D0%BA%D1%80%D0%B0%D0%B9%D0%BD%D0%BE%D1%81%D1%82" title="Безкрайност">безкрайно</a> време. </p> <div class="mw-heading mw-heading2"><h2 id="Вижте_също"><span id=".D0.92.D0.B8.D0.B6.D1.82.D0.B5_.D1.81.D1.8A.D1.89.D0.BE"></span>Вижте също</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=5" title="Редактиране на раздел: Вижте също" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=5" title="Edit section's source code: Вижте също"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/%D0%93%D0%B5%D0%BE%D1%81%D1%82%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%B0%D1%80%D0%BD%D0%B0_%D0%BE%D1%80%D0%B1%D0%B8%D1%82%D0%B0" title="Геостационарна орбита">Геостационарна орбита</a></li> <li><a href="/wiki/%D0%97%D0%B2%D0%B5%D0%B7%D0%B4%D0%BD%D0%BE_%D0%B2%D1%80%D0%B5%D0%BC%D0%B5" class="mw-redirect" title="Звездно време">Звездно време</a></li> <li><a href="/w/index.php?title=%D0%A1%D0%B8%D0%BD%D0%BE%D0%B4%D0%B8%D1%87%D0%B5%D0%BD_%D0%BC%D0%B5%D1%81%D0%B5%D1%86&action=edit&redlink=1" class="new" title="Синодичен месец (страницата не съществува)">Синодичен месец</a></li> <li><a href="/wiki/%D0%97%D0%B0%D0%B4%D0%B0%D1%87%D0%B0_%D1%81_%D0%B4%D0%B2%D0%B5_%D1%82%D0%B5%D0%BB%D0%B0" title="Задача с две тела">Задача с две тела</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Източници"><span id=".D0.98.D0.B7.D1.82.D0.BE.D1.87.D0.BD.D0.B8.D1.86.D0.B8"></span>Източници</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&veaction=edit&section=6" title="Редактиране на раздел: Източници" class="mw-editsection-visualeditor"><span>редактиране</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B0%D0%BB%D0%B5%D0%BD_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4&action=edit&section=6" title="Edit section's source code: Източници"><span>редактиране на кода</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Bate, Roger B.; Mueller, Donald D. & White, Jerry E. (1971), Fundamentals of Astrodynamics, Dover</li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Взето от „<a dir="ltr" href="https://bg.wikipedia.org/w/index.php?title=Орбитален_период&oldid=11309055">https://bg.wikipedia.org/w/index.php?title=Орбитален_период&oldid=11309055</a>“.</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D0%BD%D0%B8:%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D0%B8" title="Специални:Категории">Категории</a>: <ul><li><a href="/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%9E%D1%80%D0%B1%D0%B8%D1%82%D0%B8" title="Категория:Орбити">Орбити</a></li><li><a href="/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%92%D1%80%D0%B5%D0%BC%D0%B5_%D0%B2_%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%BD%D0%BE%D0%BC%D0%B8%D1%8F%D1%82%D0%B0" title="Категория:Време в астрономията">Време в астрономията</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Последната промяна на страницата е извършена на 17 февруари 2022 г. в 03:15 ч.</li> <li id="footer-info-copyright">Текстът е достъпен под лиценза <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.bg">Creative Commons Признание-Споделяне на споделеното</a>; може да са приложени допълнителни условия. 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