{"id":62691,"date":"2026-11-08T07:18:26","date_gmt":"2026-11-08T07:18:26","guid":{"rendered":"https:\/\/www.worldclock.com\/kalkulator-waktu-sideris\/"},"modified":"2026-11-08T07:18:26","modified_gmt":"2026-11-08T07:18:26","slug":"kalkulator-waktu-sideris","status":"publish","type":"page","link":"https:\/\/www.worldclock.com\/ms\/kalkulator-waktu-sideris\/","title":{"rendered":"Kalkulator Waktu Sideris &#038; Tarikh 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\/ms\/\">Jam Dunia<\/a><\/li><li><a href=\"https:\/\/www.worldclock.com\/ms\/alat\/\">Alat Waktu<\/a><\/li><li><span aria-current=\"page\">Kalkulator Waktu Sideris &amp; Tarikh Julian<\/span><\/li><\/ol><\/nav><p class=\"wc-eyebrow\"><span aria-hidden=\"true\">\ud83c\udf0c<\/span> Alat percuma<\/p><h1 class=\"wc-thero__title\">Kalkulator Waktu Sideris &amp; Tarikh Julian<\/h1><p class=\"wc-thero__lead\">Waktu sideris tempatan, waktu sideris Greenwich, Tarikh Julian dan Tarikh Julian Terubah Suai secara langsung untuk mana-mana tempat dan waktu.<\/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 bandar\u2026\" aria-label=\"Cari bandar\u2026\" autocomplete=\"off\"><ul class=\"wc-search__results\" hidden><\/ul><\/div><\/div><label class=\"wc-field\"><span>Longitud \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 Guna 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>Tukar tarikh<\/h2><label class=\"wc-field\"><span>Tarikh &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>Apakah itu waktu sideris?<\/h2><p>Waktu sideris mengukur putaran Bumi berbanding bintang-bintang yang jauh dan bukannya matahari. Satu hari sideris adalah kira-kira <strong>23 jam 56 minit 4 saat<\/strong> \u2013 hampir empat minit lebih pendek daripada hari suria \u2013 jadi bintang terbit empat minit lebih awal setiap malam. Ahli astronomi menggunakan <strong>waktu sideris tempatan (LST)<\/strong> untuk menghalakan teleskop: sesebuah bintang berada paling tinggi di langit apabila LST sama dengan asensio rektanya.<\/p><p><strong>Tarikh Julian<\/strong> ialah kiraan hari berterusan sejak tengah hari UTC pada 1 Januari 4713 SM, digunakan untuk mengelakkan komplikasi kalendar dalam astronomi. <strong>Tarikh Julian Terubah Suai<\/strong> (MJD) ialah JD \u2212 2,400,000.5 dan bermula pada tengah malam.<\/p><\/div><\/section><section class=\"wc-section wc-faq\"><h2>Soalan lazim<\/h2><details><summary>Bagaimanakah saya mengira waktu sideris tempatan?<\/summary><p>Kira Waktu Sideris Min Greenwich daripada Tarikh Julian, kemudian tambah longitud anda dalam jam (longitud \u00f7 15, timur positif). Kalkulator di atas melakukannya secara langsung untuk mana-mana lokasi.<\/p><\/details><\/section><section class=\"wc-section wc-tools-grid\"><div class=\"wc-section__head\"><h2>Lebih banyak alat waktu percuma<\/h2><a href=\"https:\/\/www.worldclock.com\/ms\/alat\/\">Semua alat \u2192<\/a><\/div><div class=\"wc-toolcards\"><a class=\"wc-toolcard wc-toolcard--sun\" href=\"https:\/\/www.worldclock.com\/ms\/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 waktu keemasan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--golden\" href=\"https:\/\/www.worldclock.com\/ms\/kalkulator-waktu-keemasan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udcf8<\/span><span class=\"wc-toolcard__name\">Kalkulator Waktu Keemasan<\/span><span class=\"wc-toolcard__desc\">Cahaya terbaik untuk foto.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moon\" href=\"https:\/\/www.worldclock.com\/ms\/fasa-bulan\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf15<\/span><span class=\"wc-toolcard__name\">Fasa Bulan Hari Ini<\/span><span class=\"wc-toolcard__desc\">Bulan malam ini &amp; kalendar bulan.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--fullmoon\" href=\"https:\/\/www.worldclock.com\/ms\/kalendar-bulan-purnama\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf1d<\/span><span class=\"wc-toolcard__name\">Kalendar Bulan Purnama<\/span><span class=\"wc-toolcard__desc\">Tarikh &amp; nama bulan purnama.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--moonrise\" href=\"https:\/\/www.worldclock.com\/ms\/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\">Bila bulan terbit &amp; terbenam.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--birthmoon\" href=\"https:\/\/www.worldclock.com\/ms\/fasa-bulan-hari-lahir\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83c\udf82<\/span><span class=\"wc-toolcard__name\">Bulan pada Hari Lahir Anda<\/span><span class=\"wc-toolcard__desc\">Bulan pada mana-mana tarikh.<\/span><\/a><a class=\"wc-toolcard wc-toolcard--astro\" href=\"https:\/\/www.worldclock.com\/ms\/kalendar-astronomi\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd2d<\/span><span class=\"wc-toolcard__name\">Kalendar 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\/ms\/penukar-zon-waktu\/\"><span class=\"wc-toolcard__icon\" aria-hidden=\"true\">\ud83d\udd01<\/span><span class=\"wc-toolcard__name\">Penukar Zon Waktu<\/span><span class=\"wc-toolcard__desc\">Tukar waktu antara mana-mana bandar.<\/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-62691","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\/ms\/author\/clocker\/"},"comment_info":"","_links":{"self":[{"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/pages\/62691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/comments?post=62691"}],"version-history":[{"count":0,"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/pages\/62691\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.worldclock.com\/ms\/wp-json\/wp\/v2\/media?parent=62691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}