{"id":6791,"date":"2024-12-09T20:06:13","date_gmt":"2024-12-09T19:06:13","guid":{"rendered":"https:\/\/www.lycee-valin.fr\/RJVALIN\/?p=6791"},"modified":"2024-12-12T07:35:26","modified_gmt":"2024-12-12T06:35:26","slug":"c-2023-a3","status":"publish","type":"post","link":"https:\/\/www.lycee-valin.fr\/RJVALIN\/c-2023-a3\/","title":{"rendered":"C\/2023 A3"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p><strong>C\/2023 A3 Tsuchinshan-ATLAS<\/strong>, sous ce nom de code myst\u00e9rieux se cache un astre appartenant \u00e0 la plus belle cat\u00e9gorie d\u2019objets du syst\u00e8me solaire, les com\u00e8tes\u00a0!<\/p>\n\n\n\n<p>C\/2023 A3 nous a rendu visite au mois d\u2019octobre dernier. Ne la cherchez pas dans le ciel, elle est d\u00e9j\u00e0 partie. Elle reviendra dans plus de 200 ans, peut-\u00eatre.<\/p>\n\n\n\n<p>D\u00e9couverte en janvier 2023 par l\u2019Observatoire de la Montagne Pourpre ( Tsuchinshan &#8211; Nankin &#8211; Chine ) et en f\u00e9vrier par l\u2019observatoire ATLAS (Hawai \u2013 USA), ce g\u00e9ocroiseur n\u2019est pas pass\u00e9 loin de la Terre, 0,47 UA (70 millions de km. Ouf,  pas de quoi rayer la carrosserie ).<\/p>\n\n\n\n<p>Le 27 septembre dernier elle \u00e9tait \u00e0 son <strong>p\u00e9rih\u00e9lie<\/strong>, \u00e0 une distance de 58 millions de km du Soleil et le 9 octobre elle a atteint sa magnitude maximale. De nombreuses photos ont \u00e9t\u00e9 faites \u00e0 travers le monde. Vous pouvez d\u00e9couvrir notre visiteuse sur le web et <a href=\"https:\/\/www.cieletespace.fr\/actualites\/la-comete-tsuchinshan-atlas-tient-ses-promesses\">certaines photos sont magnifiques<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"596\" src=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/Figure_1.png\" alt=\"\" class=\"wp-image-6792\" srcset=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/Figure_1.png 800w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/Figure_1-300x224.png 300w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/Figure_1-768x572.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Le club <strong>AstroValin <\/strong>\u00e9tait sur le coup. Le 9 octobre, les conditions m\u00e9t\u00e9o n\u2019\u00e9taient pas favorables dans les environs de La Rochelle. Apr\u00e8s plusieurs tentatives, chacun de notre c\u00f4t\u00e9, nous avons pu la voir le 13 octobre avec une magnitude +3. <strong>Lou Auneau <\/strong>nous a envoy\u00e9 cette photo.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0012-768x1024.jpg\" alt=\"\" class=\"wp-image-6795\" style=\"width:440px;height:auto\" srcset=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0012-768x1024.jpg 768w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0012-225x300.jpg 225w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0012-1152x1536.jpg 1152w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0012.jpg 1512w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<p>Un autre observateur du club, post\u00e9 du c\u00f4t\u00e9 d\u2019Angoulin, nous a envoy\u00e9 celle ci.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"771\" src=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1-1024x771.jpg\" alt=\"\" class=\"wp-image-6796\" style=\"width:453px;height:auto\" srcset=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1-1024x771.jpg 1024w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1-300x226.jpg 300w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1-768x578.jpg 768w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1-1536x1157.jpg 1536w, https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-content\/uploads\/2024\/12\/IMG-20241013-WA0010-1.jpg 2040w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Actuellement dans la constellation de l\u2019Aigle, distance 2,12 UA, magnitude 9,69,  nous ne pouvons plus la voir \u00e0 l\u2019\u0153il nu. <\/p>\n\n\n\n<p>Bye-bye C\/2023 A3 Tsuchinshan-ATLAS.<\/p>\n\n\n\n<p>UA = Unit\u00e9 Astronomique = Distance conventionnelle Terre-Soleil <\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\/2023 A3 Tsuchinshan-ATLAS, sous ce nom de code myst\u00e9rieux se cache un astre appartenant \u00e0 la plus belle cat\u00e9gorie d\u2019objets du syst\u00e8me solaire, les com\u00e8tes\u00a0! C\/2023 A3 nous a rendu visite au mois d\u2019octobre dernier. <a class=\"more-link\" href=\"https:\/\/www.lycee-valin.fr\/RJVALIN\/c-2023-a3\/\">Lire plus &#8230;<\/a><\/p>\n","protected":false},"author":20,"featured_media":6848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120,23],"tags":[187],"class_list":["post-6791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actions-et-evenements","category-vie-au-lycee","tag-club-astrovalin-astronomie-comete"],"_links":{"self":[{"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/posts\/6791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/comments?post=6791"}],"version-history":[{"count":8,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/posts\/6791\/revisions"}],"predecessor-version":[{"id":6814,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/posts\/6791\/revisions\/6814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/media\/6848"}],"wp:attachment":[{"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/media?parent=6791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/categories?post=6791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lycee-valin.fr\/RJVALIN\/wp-json\/wp\/v2\/tags?post=6791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}