{"id":21121,"date":"2025-04-21T09:52:18","date_gmt":"2025-04-21T09:52:18","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=21121"},"modified":"2025-05-07T16:57:13","modified_gmt":"2025-05-07T16:57:13","slug":"la-comete-c-2025-f2-swan-fait-pschitt","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/04\/21\/la-comete-c-2025-f2-swan-fait-pschitt\/","title":{"rendered":"La com\u00e8te C\/2025 F2 (SWAN) fait pschitt"},"content":{"rendered":"<p><strong>On l&#8217;esp\u00e9rait visible \u00e0 l&#8217;\u0153il nu d\u00e9but mai, mais ce ne sera pas le cas. La com\u00e8te C\/2025 F2 (SWAN) s&#8217;est probablement d\u00e9sint\u00e9gr\u00e9e.\u00a0<\/strong><\/p>\n<h5>Impr\u00e9visibles com\u00e8tes :<\/h5>\n<p>C\/2025 F2 (SWAN) avait \u00e9t\u00e9 d\u00e9couverte le 22 mars 2025 par l\u2019instrument SWAN, embarqu\u00e9 \u00e0 bord du satellite solaire <a href=\"https:\/\/soho.nascom.nasa.gov\/data\/summary\/swan\/\" target=\"_blank\" rel=\"noopener\">SOHO<\/a>. D\u00e9but avril, elle \u00e9tait d\u00e9j\u00e0 tr\u00e8s photog\u00e9nique, comme le montre cette image r\u00e9alis\u00e9e par <a href=\"https:\/\/spaceweathergallery2.com\/indiv_upload.php?upload_id=221906\" target=\"_blank\" rel=\"noopener\">Michael Jaeger et Gerald Rhemann<\/a>\u00a0:<\/p>\n<figure id=\"attachment_21089\" aria-describedby=\"caption-attachment-21089\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet.jpg\" rel=\"lightbox[21121]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21089\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet.jpg 1498w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21089\" class=\"wp-caption-text\">La com\u00e8te C\/2025 F2 (SWAN)\u00a0 le 6 avril 2025. \u00a9 Michael Jaeger\/Gerald Rhemann<\/figcaption><\/figure>\n<p>La\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de la com\u00e8te \u00e9tait alors estim\u00e9e \u00e0 9, donc r\u00e9serv\u00e9e aux t\u00e9lescopes. Mais la courbe de luminosit\u00e9 pr\u00e9visionnelle laissait esp\u00e9rer qu&#8217;elle devienne visible \u00e0 l\u2019\u0153il nu d\u00e9but mai. Les astrophotographes auraient pu alors immortaliser l&#8217;astre chevelu dans le m\u00eame champ que le c\u00e9l\u00e8bre <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/03\/31\/lamas-detoiles-des-pleiades-dans-la-poussiere\/\" target=\"_blank\" rel=\"noopener\">amas des Pl\u00e9iades<\/a>. Malheureusement, les r\u00e9centes observations laissent penser que la com\u00e8te n&#8217;a pas r\u00e9sist\u00e9 \u00e0 son approche du Soleil. L&#8217;astrophotographe <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=4085340345019180&amp;set=gm.2429529617217486&amp;idorvanity=123943134442824\" target=\"_blank\" rel=\"noopener\">Eduard Andrei Mociran<\/a> a confirm\u00e9 la d\u00e9sint\u00e9gration de l&#8217;astre chevelu avec ce comparatif :<\/p>\n<figure id=\"attachment_21122\" aria-describedby=\"caption-attachment-21122\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1.jpg\" rel=\"lightbox[21121]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21122\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet1-1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21122\" class=\"wp-caption-text\">En quatre nuits, l&#8217;aspect de la com\u00e8te C\/2025 F2 (SWAN) a bien chang\u00e9. \u00a9 E. A. Mociran<\/figcaption><\/figure>\n<p>Comme le rappelle l&#8217;astronome <a href=\"https:\/\/lesia.obspm.fr\/perso\/jacques-crovisier\/promenade\/pro_comete_mort.html\" target=\"_blank\" rel=\"noopener\">Jacques Crovisier<\/a>, les com\u00e8tes ne sont pas des astres immuables et peuvent dispara\u00eetre de bien des mani\u00e8res. <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-bref-non-comete-elenin-nannonce-pas-fin-monde-31546\/\" target=\"_blank\" rel=\"noopener\">C\/2010 X1 (Elenin)<\/a>, <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/comete-hubble-devoile-nouvelles-images-fragments-comete-atlas-79752\/\" target=\"_blank\" rel=\"noopener\">C\/2019 Y4 (Atlas)<\/a> ou encore <a href=\"https:\/\/www.futura-sciences.com\/sciences\/breves\/comete-interstellaire-comete-interstellaire-2i-borisov-photographiee-hubble-1332\/\" target=\"_blank\" rel=\"noopener\">C\/2019 Q4 (Borissov)<\/a> ont connu le m\u00eame sort dans le pass\u00e9. Sur le site<a href=\"https:\/\/astro.vanbuitenen.nl\/comet\/2025F2\" target=\"_blank\" rel=\"noopener\"> astro.vanbuitenen<\/a>, les mesures de luminosit\u00e9 de la com\u00e8te SWAN s&#8217;\u00e9cartent d\u00e9sormais chaque nuit un peu plus de la courbe pr\u00e9visionnelle, au grand dam des astronomes :<\/p>\n<figure id=\"attachment_21123\" aria-describedby=\"caption-attachment-21123\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2.jpg\" rel=\"lightbox[21121]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21123\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2-450x304.jpg\" alt=\"\" width=\"450\" height=\"304\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2-450x304.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2-1024x693.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2-768x519.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/04\/comet2-2.jpg 1060w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21123\" class=\"wp-caption-text\">Mesures de luminosit\u00e9 de la com\u00e8te SWAN. \u00a9 astro.vanbuitenen<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/03\/14\/splendeurs-dans-le-sillage-de-la-comete-12p-pons-brooks\/\" target=\"_blank\" rel=\"noopener\">Splendeurs dans le sillage de la com\u00e8te 12P\/Pons-Brooks<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/09\/02\/la-comete-nishimura-assaillie-par-le-vent-solaire\/\" target=\"_blank\" rel=\"noopener\">La com\u00e8te Nishimura assaillie par le vent solaire<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/01\/29\/les-exocometes-sont-nombreuses-autour-des-etoiles\/\" target=\"_blank\" rel=\"noopener\">Les exocom\u00e8tes sont nombreuses autour des \u00e9toiles<\/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>\u00a0et sur\u00a0<a href=\"https:\/\/bsky.app\/profile\/cielmania.bsky.social\" target=\"_blank\" rel=\"noopener\">Bluesky<\/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>On l&#8217;esp\u00e9rait visible \u00e0 l&#8217;\u0153il nu d\u00e9but mai, mais ce ne sera pas le cas. La com\u00e8te C\/2025 F2 (SWAN) s&#8217;est probablement d\u00e9sint\u00e9gr\u00e9e.\u00a0 Impr\u00e9visibles com\u00e8tes : C\/2025 F2 (SWAN) avait \u00e9t\u00e9 d\u00e9couverte le 22 mars 2025 par l\u2019instrument SWAN, embarqu\u00e9 \u00e0 bord du satellite solaire SOHO. D\u00e9but avril, elle \u00e9tait d\u00e9j\u00e0 tr\u00e8s photog\u00e9nique, comme le &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/04\/21\/la-comete-c-2025-f2-swan-fait-pschitt\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La com\u00e8te C\/2025 F2 (SWAN) fait pschitt<\/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":21122,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3761,2802,3758,3760,3759],"class_list":["post-21121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-c-2019-q4-borissov","tag-c-2019-y4-atlas","tag-c-2025-f2-swan","tag-eduard-andrei-mociran","tag-jacques-crovisier"],"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\/2025 F2 (SWAN) fait pschitt<\/title>\n<meta name=\"description\" content=\"On l&#039;esp\u00e9rait visible \u00e0 l&#039;\u0153il nu d\u00e9but mai, mais ce ne sera pas le cas. 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