{"id":17118,"date":"2022-12-20T13:11:44","date_gmt":"2022-12-20T13:11:44","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=17118"},"modified":"2023-01-12T18:02:49","modified_gmt":"2023-01-12T18:02:49","slug":"la-comete-c-2022-e3-ztf-approche-sortez-vos-jumelles","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/12\/20\/la-comete-c-2022-e3-ztf-approche-sortez-vos-jumelles\/","title":{"rendered":"La com\u00e8te C\/2022 E3 (ZTF) approche, sortez vos jumelles !"},"content":{"rendered":"<p><strong>Une nouvelle com\u00e8te vient nous rendre visite, et elle sera visible dans une paire de jumelles en f\u00e9vrier 2023. Il s&#8217;agit de C\/2022 E3 (ZTF).<\/strong><\/p>\n<h5>Grande voyageuse :<\/h5>\n<p>C\/2022 E3 (ZTF) est une com\u00e8te \u00e0 tr\u00e8s longue p\u00e9riode orbitale qui nous a d\u00e9j\u00e0 rendu visite il y a environ 50.000 ans. Elle a \u00e9t\u00e9 d\u00e9couverte le 2 mars 2022 par le <a href=\"https:\/\/www.ztf.caltech.edu\/\" target=\"_blank\" rel=\"noopener\"><em>Zwicky Transient Facility<\/em><\/a>. Nomm\u00e9 en hommage \u00e0 l&#8217;astrophysicien Fritz Zwicky (1898-1974), ce relev\u00e9 astronomique est assur\u00e9 par l&#8217;un des t\u00e9lescopes du <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-observatoire-mont-palomar-4769\/\" target=\"_blank\" rel=\"noopener\">mont Palomar<\/a>. Lors de sa d\u00e9couverte, C\/2022 E3 (ZTF) avait une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de 17 et se trouvait \u00e0 4 <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-unite-astronomique-63\/\" target=\"_blank\" rel=\"noopener\">Unit\u00e9s Astronomiques<\/a> (UA). Mais les calculs des astronomes ont montr\u00e9 que cet astre chevelu allait s&#8217;approcher assez pr\u00e8s de la Terre :<\/p>\n<figure id=\"attachment_17119\" aria-describedby=\"caption-attachment-17119\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF.jpg\" rel=\"lightbox[17118]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17119\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-17119\" class=\"wp-caption-text\">La com\u00e8te C\/2022 E3 (ZTF) photographi\u00e9e le 18 d\u00e9cembre 2022. \u00a9 Michael J\u00e4ger<\/figcaption><\/figure>\n<p>Le 1er f\u00e9vrier 2023, la com\u00e8te passera \u00e0 un peu moins de 0,3 UA. Elle devrait alors avoir une magnitude proche de 5, ce qui la rendra facilement observable aux <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/10\/30\/ciel-aux-jumelles-guide-decouvrir-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">jumelles<\/a> ou avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener\">longue-vue<\/a>. Selon certaines sources, elle pourrait m\u00eame atteindre la magnitude 4, devenant ainsi visible \u00e0 l&#8217;\u0153il nu, loin de toute <a href=\"https:\/\/www.futura-sciences.com\/sciences\/questions-reponses\/espace-quest-ce-pollution-lumineuse-12\/\" target=\"_blank\" rel=\"noopener\">pollution lumineuse<\/a>.<\/p>\n<p><!--more--><\/p>\n<h5>Double queue :<\/h5>\n<p>En f\u00e9vrier 2023, la com\u00e8te se trouvera dans la constellation de la Girafe, donc id\u00e9alement plac\u00e9e pour les observateurs europ\u00e9ens. En attendant, elle circule du c\u00f4t\u00e9 de la <a href=\"https:\/\/www.cosmovisions.com\/crb.htm\" target=\"_blank\" rel=\"noopener\">Couronne Bor\u00e9ale<\/a> avec une magnitude de 8. On d\u00e9couvre son aspect sur les clich\u00e9s obtenus par Michael J\u00e4ger (<a href=\"https:\/\/twitter.com\/komet123jager\" target=\"_blank\" rel=\"noopener\">Twitter<\/a>) et Rolando Ligustri (<a href=\"https:\/\/www.astrobin.com\/users\/astroligu60\/\" target=\"_blank\" rel=\"noopener\">galerie d\u2019images<\/a>) :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2.jpg\" rel=\"lightbox[17118]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-17120\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2-450x300.jpg\" alt=\"\" width=\"450\" height=\"300\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2-450x300.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2-1024x683.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2-768x512.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/cometE3ZTF_2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>La com\u00e8te pr\u00e9sente typiquement deux queues, une en \u00e9ventail constitu\u00e9e de poussi\u00e8res, l\u2019autre allong\u00e9e compos\u00e9e de gaz ionis\u00e9. Comme souvent, la chevelure de la com\u00e8te est nettement verte en raison de la forte \u00e9mission de carbone diatomique. Les estimations d&#8217;\u00e9clat de C\/2022 E3 (ZTF) et les cartes de sa trajectoire sont sur les pages de <a href=\"http:\/\/astro.vanbuitenen.nl\/comet\/2022E3\" target=\"_blank\" rel=\"noopener\">AstroVanbuitenen<\/a> et de <a href=\"http:\/\/www.aerith.net\/comet\/catalog\/2022E3\/2022E3.html\" target=\"_blank\" rel=\"noopener\">Seiichi Yoshida<\/a> :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/carte_comete.jpg\" rel=\"lightbox[17118]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-17167\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/carte_comete-450x338.jpg\" alt=\"\" width=\"450\" height=\"338\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/carte_comete-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/carte_comete-768x576.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/carte_comete.jpg 1024w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>D\u00e9but f\u00e9vrier 2023, C\/2022 E3 (ZTF) passera \u00e0 proximit\u00e9 de la Terre selon une configuration g\u00e9om\u00e9trique rappelant celle de la majestueuse <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/03\/25\/printemps-1996-la-comete-hyakutake-fait-le-spectacle\/\" target=\"_blank\" rel=\"noopener\">com\u00e8te Hyakutake<\/a>, 27 ans plus t\u00f4t. La com\u00e8te de 2023 sera cependant 2,5 fois plus \u00e9loign\u00e9e que celle de 1996 :<\/p>\n<figure id=\"attachment_17139\" aria-describedby=\"caption-attachment-17139\" style=\"width: 300px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake.jpg\" rel=\"lightbox[17118]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-17139\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake-300x450.jpg\" alt=\"\" width=\"300\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake-300x450.jpg 300w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake-683x1024.jpg 683w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake-768x1152.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/12\/hyakutake.jpg 900w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-17139\" class=\"wp-caption-text\">La com\u00e8te Hyakutake au printemps 1996. Au premier plan, un observateur utilisant le t\u00e9lescope de 1 m\u00e8tre de l&#8217;Observatoire de Puimichel. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/02\/07\/lexplosion-dune-comete-aurait-decime-des-peuples-amerindiens\/\" target=\"_blank\" rel=\"noopener\">L\u2019explosion d\u2019une com\u00e8te aurait d\u00e9cim\u00e9 des peuples Am\u00e9rindiens<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/12\/28\/dans-le-ciel-de-la-palma-la-comete-leonard-fait-son-show\/\" target=\"_blank\" rel=\"noopener\">Dans le ciel de La Palma, la com\u00e8te Leonard fait son show<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/12\/23\/en-avril-1066-le-retour-de-la-comete-de-halley-fut-exceptionnel\/\" target=\"_blank\" rel=\"noopener\">En 1066, le passage de la com\u00e8te de Halley fut exceptionnel<\/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>Une nouvelle com\u00e8te vient nous rendre visite, et elle sera visible dans une paire de jumelles en f\u00e9vrier 2023. Il s&#8217;agit de C\/2022 E3 (ZTF). Grande voyageuse : C\/2022 E3 (ZTF) est une com\u00e8te \u00e0 tr\u00e8s longue p\u00e9riode orbitale qui nous a d\u00e9j\u00e0 rendu visite il y a environ 50.000 ans. Elle a \u00e9t\u00e9 d\u00e9couverte &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/12\/20\/la-comete-c-2022-e3-ztf-approche-sortez-vos-jumelles\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La com\u00e8te C\/2022 E3 (ZTF) approche, sortez vos jumelles !<\/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":17130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3337,93,95,2338,895,1860],"class_list":["post-17118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-c-2022-e3-ztf","tag-comete","tag-jumelles","tag-longue-vue","tag-michael-jager","tag-rolando-ligustri"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La com\u00e8te C\/2022 E3 (ZTF) approche, sortez vos jumelles !<\/title>\n<meta name=\"description\" content=\"Une nouvelle com\u00e8te vient nous rendre visite, et elle sera visible dans une paire de jumelles en f\u00e9vrier 2023. 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