{"id":17686,"date":"2023-03-22T15:55:06","date_gmt":"2023-03-22T15:55:06","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=17686"},"modified":"2023-03-27T16:05:36","modified_gmt":"2023-03-27T16:05:36","slug":"suivez-le-passage-de-ceres-devant-la-galaxie-m100","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/03\/22\/suivez-le-passage-de-ceres-devant-la-galaxie-m100\/","title":{"rendered":"Suivez le passage de C\u00e9r\u00e8s devant la galaxie M100"},"content":{"rendered":"<p><strong>La plan\u00e8te naine C\u00e9r\u00e8s traverse l&#8217;amas de galaxies de la Vierge et passe devant Messier 100 la nuit du 26 au 27 mars.<\/strong><\/p>\n<h5>Un ast\u00e9ro\u00efde devenu plan\u00e8te naine :<\/h5>\n<p>C\u00e9r\u00e8s a \u00e9t\u00e9 d\u00e9couvert le 1er janvier 1801 par Giuseppe Piazzi, le directeur de l\u2019Observatoire de Palerme en Sicile. D&#8217;abord rang\u00e9 comme ast\u00e9ro\u00efde, on lui a donn\u00e9 le nom de la d\u00e9esse romaine de l\u2019agriculture et de la f\u00e9condit\u00e9. Mais en 2006 l\u2019<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/01\/10\/lunion-astronomique-internationale-fete-ses-100-ans\/\" target=\"_blank\" rel=\"noopener noreferrer\">Union astronomique internationale<\/a> l&#8217;a reclass\u00e9 dans la famille des plan\u00e8tes naines en raison de sa forme sph\u00e9rique. Avec un diam\u00e8tre d\u2019environ 950 km, c\u2019est la plus petite des cinq <a title=\"D\u00e9finition d'une plan\u00e8te naine\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/dico\/d\/astronomie-planete-naine-5149\/\" target=\"_blank\" rel=\"noopener\">plan\u00e8tes naines<\/a>\u00a0connues \u00e0 ce jour (il y a aussi Haum\u00e9a, Eris, Mak\u00e9mak\u00e9 et\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/02\/17\/le-telescope-qui-a-decouvert-pluton-a-fait-peau-neuve\/\" target=\"_blank\" rel=\"noopener\">Pluton<\/a>) :<\/p>\n<figure id=\"attachment_11376\" aria-describedby=\"caption-attachment-11376\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna.jpg\" rel=\"lightbox[17686]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-11376\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna-768x433.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna-1024x577.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/11\/ahuna.jpg 1280w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-11376\" class=\"wp-caption-text\">Ahuna Mons (photographi\u00e9 par la sonde Dawn), un cryovolcan sur C\u00e9r\u00e8s. \u00a9 NASA<\/figcaption><\/figure>\n<p>Sa <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener noreferrer\">magnitude<\/a> varie de9,3 \u00e0 6,7 lors du passage au p\u00e9rih\u00e9lie (tous les 15 mois environ). C\u2019est le cas durant ce mois de mars 2023. Une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/10\/30\/ciel-aux-jumelles-guide-decouvrir-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">paire de jumelles<\/a>\u00a0ou une\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener noreferrer\">longue-vue<\/a>\u00a0suffisent pour la rep\u00e9rer.<!--more--><\/p>\n<h5>Rencontre c\u00e9leste :<\/h5>\n<p>Au plaisir de suivre chaque nuit le d\u00e9placement de la plan\u00e8te naine au milieu des \u00e9toiles, s&#8217;ajoute celui de la voir croiser d&#8217;autres objets c\u00e9lestes. C\u00e9r\u00e8s circule en effet actuellement devant <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/05\/20\/des-milliers-de-galaxies-se-cachent-dans-la-vierge\/\" target=\"_blank\" rel=\"noopener\">l&#8217;amas de galaxies de la Vierge<\/a> :<\/p>\n<figure id=\"attachment_15869\" aria-describedby=\"caption-attachment-15869\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne.jpg\" rel=\"lightbox[17686]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15869\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne.jpg 1498w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15869\" class=\"wp-caption-text\">La constellation de la Vierge en d\u00e9but de nuit au printemps. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Comme nous l&#8217;explique <a href=\"https:\/\/www.imcce.fr\/newsletter\/html\/newsletter.html#current-article2\" target=\"_blank\" rel=\"noopener\">La Lettre d&#8217;information de l&#8217;IMCCE<\/a>, c&#8217;est durant la nuit du 26 au 27 mars qu&#8217;a lieu la plus jolie rencontre. \u00c0 0\u202fh TU (2\u202fh en France), C\u00e9r\u00e8s se trouvera devant M100 (NGC 4321). Cette belle galaxie spirale (qui a d\u00e9j\u00e0 \u00e9t\u00e9 <a href=\"https:\/\/www.eso.org\/public\/france\/images\/eso-m100\/\" target=\"_blank\" rel=\"noopener\">photographi\u00e9e par l&#8217;ESO<\/a>) est situ\u00e9e \u00e0 environ 50 millions d&#8217;<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-annee-lumiere-17\/\" target=\"_blank\" rel=\"noopener\">ann\u00e9es-lumi\u00e8re<\/a>. Sa d\u00e9couverte par l&#8217;astronome fran\u00e7ais Pierre M\u00e9chain a eu lieu en 1781. Un mois plus tard, Charles Messier la faisait entrer en centi\u00e8me position dans son c\u00e9l\u00e8bre <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-astronomie-catalogue-messier-250-ans-16597\/\" target=\"_blank\" rel=\"noopener\">catalogue<\/a> :<\/p>\n<figure id=\"attachment_17687\" aria-describedby=\"caption-attachment-17687\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1.jpg\" rel=\"lightbox[17686]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17687\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/03\/ceres1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-17687\" class=\"wp-caption-text\">C\u00e9r\u00e8s passe devant la galaxie spirale M100 le 27 mars 2023. \u00a9 Caltech\/Palomar\/IMCCE<\/figcaption><\/figure>\n<p>On pourra suivre ce beau transit pendant une grande partie de la nuit en l&#8217;absence de Lune. La magnitude de NGC 4321 \u00e9tant de 9, l&#8217;usage d&#8217;un <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope<\/a> sera pr\u00e9f\u00e9rable pour profiter de ce spectacle.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/04\/etonnant-transit-de-phobos-devant-la-planete-mars\/\" target=\"_blank\" rel=\"noopener\">L&#8217;\u00e9tonnant transit de Phobos devant la plan\u00e8te Mars<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/11\/12\/en-video-sdo-filme-le-transit-de-mercure-depuis-lespace\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : SDO filme le transit de Mercure depuis l&#8217;espace<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/08\/12\/de-la-saumure-remonte-a-la-surface-de-la-planete-naine-ceres\/\" target=\"_blank\" rel=\"noopener\">De la saumure remonte \u00e0 la surface de C\u00e9r\u00e8s<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>La plan\u00e8te naine C\u00e9r\u00e8s traverse l&#8217;amas de galaxies de la Vierge et passe devant Messier 100 la nuit du 26 au 27 mars. Un ast\u00e9ro\u00efde devenu plan\u00e8te naine : C\u00e9r\u00e8s a \u00e9t\u00e9 d\u00e9couvert le 1er janvier 1801 par Giuseppe Piazzi, le directeur de l\u2019Observatoire de Palerme en Sicile. D&#8217;abord rang\u00e9 comme ast\u00e9ro\u00efde, on lui a &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/03\/22\/suivez-le-passage-de-ceres-devant-la-galaxie-m100\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Suivez le passage de C\u00e9r\u00e8s devant la galaxie M100<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":17691,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[549,1600,3391,190,627],"class_list":["post-17686","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-ceres","tag-imcce","tag-messier-100","tag-opposition","tag-planete-naine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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