{"id":74652,"date":"2026-11-12T17:13:20","date_gmt":"2026-11-12T17:13:20","guid":{"rendered":"https:\/\/www.worldclock.com\/sidereal-time-calculator\/"},"modified":"2026-11-12T17:13:20","modified_gmt":"2026-11-12T17:13:20","slug":"sidereal-time-calculator","status":"publish","type":"page","link":"https:\/\/www.worldclock.com\/fil\/sidereal-time-calculator\/","title":{"rendered":"Sidereal Time at Julian Date Calculator"},"content":{"rendered":"<div class=\"wc wc-tool-page wc-tool-page--sidereal\"><header class=\"wc-thero\"><div class=\"wc-thero__text\"><nav class=\"wc-crumbs\" aria-label=\"Breadcrumb\"><ol><li><a href=\"https:\/\/www.worldclock.com\/fil\/\">World Clock<\/a><\/li><li><a href=\"https:\/\/www.worldclock.com\/fil\/mga-tool\/\">Mga Time Tool<\/a><\/li><li><span aria-current=\"page\">Sidereal Time at Julian Date Calculator<\/span><\/li><\/ol><\/nav><p class=\"wc-eyebrow\"><span aria-hidden=\"true\">\ud83c\udf0c<\/span> Libreng tool<\/p><h1 class=\"wc-thero__title\">Sidereal Time at Julian Date Calculator<\/h1><p class=\"wc-thero__lead\">Live na local sidereal time, Greenwich sidereal time, Julian Date at Modified Julian Date para sa anumang lugar at oras.<\/p><\/div><\/header><div class=\"wc-tool\"><div class=\"wc-sid\" data-wc-tool=\"sidereal\" data-default=\"{&quot;n&quot;:&quot;Greenwich&quot;,&quot;t&quot;:&quot;Europe\\\/London&quot;,&quot;f&quot;:&quot;gb&quot;,&quot;a&quot;:51.4769,&quot;o&quot;:-0.0005}\"><div class=\"wc-tbar\"><div class=\"wc-field wc-field--grow\"><span>Lokasyon<\/span><div class=\"wc-search wc-search--tool\" data-wc-search data-mode=\"add\"><input type=\"search\" placeholder=\"Maghanap ng lungsod\u2026\" aria-label=\"Maghanap ng lungsod\u2026\" autocomplete=\"off\"><ul class=\"wc-search__results\" hidden><\/ul><\/div><\/div><label class=\"wc-field\"><span>Longitude \u00b0<\/span><input type=\"number\" step=\"0.0001\" min=\"-180\" max=\"180\" data-lng><\/label><button type=\"button\" class=\"wc-btn wc-btn--ghost\" data-geo>\ud83d\udccd Gamitin ang lokasyon ko<\/button><\/div><div class=\"wc-sunc__place\" data-place><\/div><div class=\"wc-sunc__cards\" data-cards><\/div><div class=\"wc-panel\" style=\"margin-top:16px\"><h2>Mag-convert ng petsa<\/h2><label class=\"wc-field\"><span>Petsa &amp; oras (UTC)<\/span><input type=\"datetime-local\" step=\"1\" data-dt><\/label><dl class=\"wc-unix__out\" data-out><\/dl><\/div><\/div><\/div><section class=\"wc-section wc-tool-info\"><div class=\"wc-prose\"><h2>Ano ang sidereal time?<\/h2><p>Sinusukat ng sidereal time ang pag-ikot ng Earth kaugnay ng malalayong bituin sa halip na ng araw. Ang isang sidereal day ay mga <strong>23 oras 56 minuto 4 segundo<\/strong> \u2013 halos apat na minutong mas maikli kaysa solar day \u2013 kaya apat na minutong mas maaga sumisikat ang mga bituin bawat gabi. Ginagamit ng mga astronomer ang <strong>local sidereal time (LST)<\/strong> para itutok ang teleskopyo: pinakamataas sa langit ang isang bituin kapag katumbas ng LST ang right ascension nito.<\/p><p>Ang <strong>Julian Date<\/strong> ay tuloy-tuloy na bilang ng araw mula tanghali UTC noong 1 Enero 4713 B.C., na ginagamit para iwasan ang mga komplikasyon ng kalendaryo sa astronomiya. Ang <strong>Modified Julian Date<\/strong> (MJD) ay JD \u2212 2,400,000.5 at nagsisimula sa hatinggabi.<\/p><\/div><\/section><section class=\"wc-section wc-faq\"><h2>Mga madalas itanong<\/h2><details><summary>Paano kuwentahin ang local sidereal time?<\/summary><p>Kuwentahin ang Greenwich Mean Sidereal Time mula sa Julian Date, saka idagdag ang longitude mo sa oras (longitude \u00f7 15, positibo ang silangan). Live itong ginagawa ng calculator sa itaas para sa anumang lokasyon.<\/p><\/details><\/section><section class=\"wc-section wc-tools-grid\"><div class=\"wc-section__head\"><h2>Iba pang libreng time tool<\/h2><a href=\"https:\/\/www.worldclock.com\/fil\/mga-tool\/\">Lahat ng tool \u2192<\/a><\/div><div class=\"wc-toolcards\"><a class=\"wc-toolcard wc-toolcard--sun\" href=\"https:\/\/www.worldclock.com\/fil\/pagsikat-paglubog-ng-araw\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf05<\/span><span class=\"wc-toolcard__name\">Calculator ng Pagsikat at Paglubog ng Araw<\/span><span class=\"wc-toolcard__desc\">Pagsikat, paglubog ng araw at golden hour.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--golden\" href=\"https:\/\/www.worldclock.com\/fil\/golden-hour-calculator\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udcf8<\/span><span class=\"wc-toolcard__name\">Golden Hour Calculator<\/span><span class=\"wc-toolcard__desc\">Pinakamagandang liwanag para sa litrato.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moon\" href=\"https:\/\/www.worldclock.com\/fil\/yugto-ng-buwan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf15<\/span><span class=\"wc-toolcard__name\">Yugto ng Buwan Ngayon<\/span><span class=\"wc-toolcard__desc\">Ang buwan ngayong gabi at kalendaryo ng buwan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--fullmoon\" href=\"https:\/\/www.worldclock.com\/fil\/kalendaryo-ng-kabilugan-ng-buwan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf1d<\/span><span class=\"wc-toolcard__name\">Kalendaryo ng Kabilugan ng Buwan<\/span><span class=\"wc-toolcard__desc\">Mga petsa at pangalan ng kabilugan ng buwan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moonrise\" href=\"https:\/\/www.worldclock.com\/fil\/pagsikat-paglubog-ng-buwan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf19<\/span><span class=\"wc-toolcard__name\">Oras ng Pagsikat at Paglubog ng Buwan<\/span><span class=\"wc-toolcard__desc\">Kailan sumisikat at lumulubog ang buwan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--birthmoon\" href=\"https:\/\/www.worldclock.com\/fil\/buwan-sa-kaarawan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf82<\/span><span class=\"wc-toolcard__name\">Ang Buwan sa Kaarawan Mo<\/span><span class=\"wc-toolcard__desc\">Ang buwan sa anumang petsa.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--astro\" href=\"https:\/\/www.worldclock.com\/fil\/kalendaryo-ng-astronomiya\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd2d<\/span><span class=\"wc-toolcard__name\">Kalendaryo ng Astronomiya<\/span><span class=\"wc-toolcard__desc\">Eclipse, meteor at mga kaganapan sa langit.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--converter\" href=\"https:\/\/www.worldclock.com\/fil\/time-zone-converter\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd01<\/span><span class=\"wc-toolcard__name\">Time Zone Converter<\/span><span class=\"wc-toolcard__desc\">Mag-convert ng oras sa pagitan ng anumang lungsod.<\/span><\/a><\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":"","bs_cache_bypass_cache":0,"bs_cache_related_page":0},"class_list":["post-74652","page","type-page","status-publish","hentry"],"acf":[],"taxonomy_info":[],"featured_image_src_large":false,"author_info":{"display_name":"clocker","author_link":"https:\/\/www.worldclock.com\/fil\/author\/clocker\/"},"comment_info":"","_links":{"self":[{"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/pages\/74652","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/comments?post=74652"}],"version-history":[{"count":0,"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/pages\/74652\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.worldclock.com\/fil\/wp-json\/wp\/v2\/media?parent=74652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}