{"id":22561,"date":"2026-03-15T10:47:50","date_gmt":"2026-03-15T10:47:50","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22561"},"modified":"2026-03-25T15:20:49","modified_gmt":"2026-03-25T15:20:49","slug":"comete-c-2026-a1-maps-a-quoi-sattendre","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/03\/15\/comete-c-2026-a1-maps-a-quoi-sattendre\/","title":{"rendered":"Com\u00e8te C\/2026 A1 (MAPS) : \u00e0 quoi s&#8217;attendre ?"},"content":{"rendered":"<p><strong>D\u00e9couverte il y a quelques semaines, la com\u00e8te C\/2026 A1 (MAPS) est l&#8217;objet de nombreuses sp\u00e9culations. Que peut-on r\u00e9ellement esp\u00e9rer voir ?<\/strong><\/p>\n<h5>Lointaine mais d\u00e9j\u00e0 c\u00e9l\u00e8bre :<\/h5>\n<p>C\/2026 A1 (MAPS) a beau \u00eatre encore bien faible (<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> 10 au moment de la r\u00e9daction de cet article), elle a d\u00e9j\u00e0 fait couler beaucoup d&#8217;encre. Les sp\u00e9culations vont bon train, certains sites annon\u00e7ant une magnitude de -20 au moment du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/P%C3%A9rih%C3%A9lie\" target=\"_blank\" rel=\"noopener\">p\u00e9rih\u00e9lie<\/a> le 4 avril 2026 ! Le 14 mars, la <a href=\"https:\/\/saf-astronomie.fr\/\" target=\"_blank\" rel=\"noopener\">SAF<\/a> a organis\u00e9 un webinaire en pr\u00e9sence des d\u00e9couvreurs de la com\u00e8te. Une cinquantaine de personnes ont suivi cette cession, anim\u00e9e par <a href=\"https:\/\/saf-astronomie.fr\/thierry-midavaine-devient-membre-honoraire-de-lunion-astronomique-internationale\/\" target=\"_blank\" rel=\"noopener\">Thierry Midavaine<\/a> et <a href=\"https:\/\/www.facebook.com\/denis.huber.AstroHub\" target=\"_blank\" rel=\"noopener\">Denis Huber<\/a>, Vice-Pr\u00e9sident du <a href=\"https:\/\/www.gapra.fr\/\" target=\"_blank\" rel=\"noopener\">GAPRA<\/a>. L&#8217;occasion de faire le point sur cette d\u00e9couverte et sur ce qui devrait se passer dans les jours \u00e0 venir.<\/p>\n<figure id=\"attachment_22563\" aria-describedby=\"caption-attachment-22563\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-22563\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am61.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-22563\" class=\"wp-caption-text\">La com\u00e8te photographi\u00e9e le 12 mars 2026. \u00a9 <a href=\"https:\/\/www.facebook.com\/photo\/?fbid=25719313974435665&amp;set=a.612357382224671\" target=\"_blank\" rel=\"noopener\">Gerald Rhemann<\/a>\/Michael J\u00e4ger<\/figcaption><\/figure>\n<h5>Un engouement justifi\u00e9 :<\/h5>\n<p>Rappelons que C\/2026 A1 (MAPS) a \u00e9t\u00e9 d\u00e9tect\u00e9e le 13 janvier par une \u00e9quipe d&#8217;astronomes amateurs. Le r\u00e9cit de cette d\u00e9couverte est \u00e0 retrouver sur le blog d&#8217;<a href=\"https:\/\/www.spaceobs.com\/Blog-de-Alain-Maury\/Comete-C-2026-A1-MAPS\" target=\"_blank\" rel=\"noopener\">Alain Maury<\/a> :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22564\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63-1024x576.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63-768x432.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am63.jpg 1487w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Rapidement, les calculs ont montr\u00e9 que cette com\u00e8te faisait partie du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Groupe_de_Kreutz\" target=\"_blank\" rel=\"noopener\">groupe de Kreutz<\/a>. Il s&#8217;agit d&#8217;un ensemble de petits astres chevelus (rattach\u00e9s \u00e0 la dislocation de la com\u00e8te d&#8217;Aristote, observ\u00e9e en -371), qui s\u2019aventurent r\u00e9guli\u00e8rement \u00e0 proximit\u00e9 du <a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>. Ce groupe compte quelques membres c\u00e9l\u00e8bres, comme <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/12\/21\/c2011-w3-lovejoy-letonnante-comete-de-decembre-2011\/\" target=\"_blank\" rel=\"noopener\">C\/2011 W3 Lovejoy<\/a>, et surtout\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-comete-ikeya-seki-6216\/\" target=\"_blank\" rel=\"noopener\">C\/1965 S1 (Ikeya-Seki)<\/a>, qui fut visible en plein jour. Une parent\u00e9 qui a enflamm\u00e9 les imaginations, et, fait rarissime, a pouss\u00e9 les astronomes \u00e0 chambouler le programme du <a href=\"https:\/\/www.jwst.fr\/\" target=\"_blank\" rel=\"noopener\">JWST<\/a> pour photographier ce nouvel astre chevelu :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22565\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64-1024x576.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64-768x432.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am64.jpg 1487w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<h5>\u00c0 quoi s&#8217;attendre :<\/h5>\n<p>Pr\u00e9cisons tout d&#8217;abord que la trajectoire de cette com\u00e8te est malheureusement d\u00e9favorable aux observateurs de l&#8217;h\u00e9misph\u00e8re Nord. Ces derniers auront sans doute beaucoup de mal \u00e0 l&#8217;observer au-dessus de l&#8217;horizon Ouest, dans les lueurs du couchant. Le spectacle profitera aux observateurs situ\u00e9s au niveau de l&#8217;\u00c9quateur et plus au Sud :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am62.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22566\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am62-450x251.jpg\" alt=\"\" width=\"450\" height=\"251\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am62-450x251.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am62-768x428.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am62.jpg 1004w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Dans un r\u00e9cent article, l&#8217;astrophotographe <a href=\"https:\/\/hdr-astrophotography.com\/\" target=\"_blank\" rel=\"noopener\">Nicolas Lefaudeux<\/a> propose plusieurs sc\u00e9narios d&#8217;\u00e9volution de la com\u00e8te. Les sp\u00e9cialistes s&#8217;accordent actuellement sur la troisi\u00e8me option :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am66.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22567\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am66-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am66-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am66-768x432.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am66.jpg 892w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>L&#8217;un des temps forts est fix\u00e9 au 4 avril. Ce jour-l\u00e0, la com\u00e8te contournera le Soleil. Un spectacle \u00e9tonnant que chacun pourra suivre gr\u00e2ce \u00e0 SOHO (<em><a href=\"http:\/\/sohowww.nascom.nasa.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\">Solar and Heliospheric Observatory<\/a><\/em>), un observatoire solaire am\u00e9ricain :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60.jpg\" rel=\"lightbox[22561]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22568\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60-450x253.jpg\" alt=\"\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60-1024x576.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60-768x432.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/am60.jpg 1280w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Il suffira alors de se rendre sur la page des instruments LASCO (<a href=\"https:\/\/www.swpc.noaa.gov\/products\/lasco-coronagraph\" target=\"_blank\" rel=\"noopener\"><em>Large Angle and Spectrometric COronagraph<\/em><\/a>). En temps normal, C2 (champ \u00e9troit) et C3 (grand champ) permettent d\u2019\u00e9tudier la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Couronne_solaire\" target=\"_blank\" rel=\"noopener\">couronne solaire<\/a>. Mais pendant quelques heures, la com\u00e8te C\/2026 A1 s&#8217;invitera dans le champ de ces coronographes.<\/p>\n<p><em>Je remercie vivement Denis Huber pour la mise \u00e0 disposition des visuels qui illustrent cet article, visuels pr\u00e9sent\u00e9s durant le webinaire du 14 mars. Vous retrouverez un article de Denis au sujet de cette com\u00e8te dans le num\u00e9ro d&#8217;avril de la revue <a href=\"https:\/\/lastronomie.fr\/\" target=\"_blank\" rel=\"noopener\">L&#8217;Astronomie<\/a>.<\/em><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/03\/11\/la-sonde-giotto-survolait-la-comete-de-halley-il-y-a-40-ans\/\" target=\"_blank\" rel=\"noopener\">La sonde Giotto survolait la com\u00e8te de Halley il y a 40 ans<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/03\/05\/en-image-leruption-de-la-comete-29p-schwassmann-wachmann\/\" target=\"_blank\" rel=\"noopener\">L\u2019\u00e9ruption de la com\u00e8te 29P\/S-W se confirme<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/02\/09\/la-mort-dune-comete-saisie-par-le-telescope-gemini-nord\/\" target=\"_blank\" rel=\"noopener\">La mort d\u2019une com\u00e8te saisie par le t\u00e9lescope Gemini Nord<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/01\/18\/6ac4721-une-comete-decouverte-par-des-amateurs\/\" target=\"_blank\" rel=\"noopener\">C\/2026 A1 (MAPS), une com\u00e8te d\u00e9couverte par des amateurs<\/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>D\u00e9couverte il y a quelques semaines, la com\u00e8te C\/2026 A1 (MAPS) est l&#8217;objet de nombreuses sp\u00e9culations. Que peut-on r\u00e9ellement esp\u00e9rer voir ? Lointaine mais d\u00e9j\u00e0 c\u00e9l\u00e8bre : C\/2026 A1 (MAPS) a beau \u00eatre encore bien faible (magnitude 10 au moment de la r\u00e9daction de cet article), elle a d\u00e9j\u00e0 fait couler beaucoup d&#8217;encre. Les sp\u00e9culations &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/03\/15\/comete-c-2026-a1-maps-a-quoi-sattendre\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Com\u00e8te C\/2026 A1 (MAPS) : \u00e0 quoi s&#8217;attendre ?<\/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":22563,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3049,3908,3244,3944,3328,3945],"class_list":["post-22561","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-alain-maury","tag-c-2026-a1-maps","tag-denis-huber","tag-nicolas-lefaudeux","tag-saf","tag-thierry-midavaine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Com\u00e8te C\/2026 A1 (MAPS) : \u00e0 quoi s&#039;attendre ?<\/title>\n<meta name=\"description\" content=\"D\u00e9couverte il y a quelques semaines, la com\u00e8te C\/2026 A1 (MAPS) est l&#039;objet de nombreuses sp\u00e9culations. 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