{"id":35537,"date":"2026-10-24T12:50:26","date_gmt":"2026-10-24T12:50:26","guid":{"rendered":"https:\/\/www.worldclock.com\/kalkulator-waktu-sideris\/"},"modified":"2026-10-24T12:50:26","modified_gmt":"2026-10-24T12:50:26","slug":"kalkulator-waktu-sideris","status":"publish","type":"page","link":"https:\/\/www.worldclock.com\/id\/kalkulator-waktu-sideris\/","title":{"rendered":"Kalkulator Waktu Sideris &#038; Tanggal Julian"},"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\/id\/\">Jam Dunia<\/a><\/li><li><a href=\"https:\/\/www.worldclock.com\/id\/alat-waktu\/\">Alat Waktu<\/a><\/li><li><span aria-current=\"page\">Kalkulator Waktu Sideris &amp; Tanggal Julian<\/span><\/li><\/ol><\/nav><p class=\"wc-eyebrow\"><span aria-hidden=\"true\">\ud83c\udf0c<\/span> Alat gratis<\/p><h1 class=\"wc-thero__title\">Kalkulator Waktu Sideris &amp; Tanggal Julian<\/h1><p class=\"wc-thero__lead\">Waktu sideris lokal, waktu sideris Greenwich, Tanggal Julian, dan Tanggal Julian Termodifikasi secara langsung untuk lokasi dan waktu mana pun.<\/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>Lokasi<\/span><div class=\"wc-search wc-search--tool\" data-wc-search data-mode=\"add\"><input type=\"search\" placeholder=\"Cari kota\u2026\" aria-label=\"Cari kota\u2026\" autocomplete=\"off\"><ul class=\"wc-search__results\" hidden><\/ul><\/div><\/div><label class=\"wc-field\"><span>Bujur \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 Gunakan lokasi saya<\/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>Konversi tanggal<\/h2><label class=\"wc-field\"><span>Tanggal &amp; waktu (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>Apa itu waktu sideris?<\/h2><p>Waktu sideris mengukur rotasi Bumi terhadap bintang-bintang jauh, bukan terhadap matahari. Satu hari sideris berlangsung sekitar <strong>23 jam 56 menit 4 detik<\/strong> \u2013 hampir empat menit lebih pendek dari hari matahari \u2013 sehingga bintang terbit empat menit lebih awal setiap malam. Astronom menggunakan <strong>waktu sideris lokal (LST)<\/strong> untuk mengarahkan teleskop: sebuah bintang berada di titik tertinggi di langit saat LST sama dengan asensio rektanya.<\/p><p><strong>Tanggal Julian<\/strong> adalah hitungan hari berkelanjutan sejak tengah hari UTC pada 1 Januari 4713 SM, yang digunakan untuk menghindari kerumitan kalender dalam astronomi. <strong>Tanggal Julian Termodifikasi<\/strong> (MJD) adalah JD \u2212 2.400.000,5 dan dimulai pada tengah malam.<\/p><\/div><\/section><section class=\"wc-section wc-faq\"><h2>Pertanyaan yang sering diajukan<\/h2><details><summary>Bagaimana cara menghitung waktu sideris lokal?<\/summary><p>Hitung Waktu Sideris Rata-rata Greenwich dari Tanggal Julian, lalu tambahkan bujur Anda dalam jam (bujur \u00f7 15, timur bernilai positif). Kalkulator di atas melakukannya secara langsung untuk lokasi mana pun.<\/p><\/details><\/section><section class=\"wc-section wc-tools-grid\"><div class=\"wc-section__head\"><h2>Alat waktu gratis lainnya<\/h2><a href=\"https:\/\/www.worldclock.com\/id\/alat-waktu\/\">Semua alat \u2192<\/a><\/div><div class=\"wc-toolcards\"><a class=\"wc-toolcard wc-toolcard--sun\" href=\"https:\/\/www.worldclock.com\/id\/matahari-terbit-terbenam\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf05<\/span><span class=\"wc-toolcard__name\">Kalkulator Matahari Terbit &amp; Terbenam<\/span><span class=\"wc-toolcard__desc\">Matahari terbit, terbenam, dan golden hour.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--golden\" href=\"https:\/\/www.worldclock.com\/id\/kalkulator-golden-hour\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udcf8<\/span><span class=\"wc-toolcard__name\">Kalkulator Golden Hour<\/span><span class=\"wc-toolcard__desc\">Cahaya terbaik untuk foto.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moon\" href=\"https:\/\/www.worldclock.com\/id\/fase-bulan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf15<\/span><span class=\"wc-toolcard__name\">Fase Bulan Hari Ini<\/span><span class=\"wc-toolcard__desc\">Bulan malam ini &amp; kalender bulan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--fullmoon\" href=\"https:\/\/www.worldclock.com\/id\/kalender-bulan-purnama\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf1d<\/span><span class=\"wc-toolcard__name\">Kalender Bulan Purnama<\/span><span class=\"wc-toolcard__desc\">Tanggal &amp; nama bulan purnama.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moonrise\" href=\"https:\/\/www.worldclock.com\/id\/bulan-terbit-terbenam\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf19<\/span><span class=\"wc-toolcard__name\">Waktu Bulan Terbit &amp; Terbenam<\/span><span class=\"wc-toolcard__desc\">Kapan bulan terbit &amp; terbenam.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--birthmoon\" href=\"https:\/\/www.worldclock.com\/id\/fase-bulan-ulang-tahun\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf82<\/span><span class=\"wc-toolcard__name\">Bulan di Hari Ulang Tahun Anda<\/span><span class=\"wc-toolcard__desc\">Bulan pada tanggal apa pun.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--astro\" href=\"https:\/\/www.worldclock.com\/id\/kalender-astronomi\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd2d<\/span><span class=\"wc-toolcard__name\">Kalender Astronomi<\/span><span class=\"wc-toolcard__desc\">Gerhana, meteor &amp; peristiwa langit.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--converter\" href=\"https:\/\/www.worldclock.com\/id\/konversi-zona-waktu\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd01<\/span><span class=\"wc-toolcard__name\">Konversi Zona Waktu<\/span><span class=\"wc-toolcard__desc\">Konversi waktu antar kota mana pun.<\/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-35537","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\/id\/author\/clocker\/"},"comment_info":"","_links":{"self":[{"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/pages\/35537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/comments?post=35537"}],"version-history":[{"count":0,"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/pages\/35537\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.worldclock.com\/id\/wp-json\/wp\/v2\/media?parent=35537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}