{"id":22637,"date":"2026-04-07T09:44:08","date_gmt":"2026-04-07T09:44:08","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22637"},"modified":"2026-04-07T09:44:08","modified_gmt":"2026-04-07T09:44:08","slug":"la-comete-c-2025-r3-panstarrs-entre-en-scene","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/04\/07\/la-comete-c-2025-r3-panstarrs-entre-en-scene\/","title":{"rendered":"La com\u00e8te C\/2025 R3 (PANSTARRS) entre en sc\u00e8ne"},"content":{"rendered":"<p><strong>Actuellement dans la constellation de P\u00e9gase, C\/2025 R3 (PANSTARRS) est la nouvelle coqueluche des chasseurs de com\u00e8tes.<\/strong><\/p>\n<h5>Une com\u00e8te en chasse une autre :<\/h5>\n<p>C\/2025 R3 (PANSTARRS) a vite fait oublier <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/04\/05\/fin-de-laventure-pour-la-comete-c-2026-a1-maps\/\" target=\"_blank\" rel=\"noopener\">C\/2026 A1 (MAPS)<\/a>, qui s&#8217;est volatilis\u00e9e le 4 avril en fr\u00f4lant le\u00a0<a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>. Place donc \u00e0 un nouvel astre chevelu, d\u00e9couvert le 8 septembre 2025 par le r\u00e9seau de surveillance <a href=\"https:\/\/promenade.imcce.fr\/fr\/pages6\/907.html\" target=\"_blank\" rel=\"noopener\">Pan-Starrs<\/a>\u00a0(<em>Panoramic Survey Telescope and Rapid Response System<\/em>). Il s&#8217;agit de deux t\u00e9lescopes robotis\u00e9s install\u00e9s \u00e0 <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/21\/la-lumiere-zodiacale-en-majeste-sur-le-mauna-kea\/\" target=\"_blank\" rel=\"noopener\">Hawaii<\/a>. Depuis leur mise en service (en 2014 et 2018), ils ont d\u00e9couvert plusieurs centaines de milliers d&#8217;<a href=\"https:\/\/promenade.imcce.fr\/fr\/pages4\/476.html\" target=\"_blank\" rel=\"noopener\">ast\u00e9ro\u00efdes<\/a>. Mais ils ont \u00e9galement d\u00e9nich\u00e9 de nombreuses <a href=\"https:\/\/cnes.fr\/dossiers\/cometes\" target=\"_blank\" rel=\"noopener\">com\u00e8tes<\/a> :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/obs.jpg\" rel=\"lightbox[22637]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22639\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/obs-450x174.jpg\" alt=\"\" width=\"450\" height=\"174\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/obs-450x174.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/obs-768x297.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/obs.jpg 958w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>C\/2025 R3 est une com\u00e8te non p\u00e9riodique, tout comme la c\u00e9l\u00e8bre <a href=\"https:\/\/fr.wikipedia.org\/wiki\/C\/1995_O1_(Hale-Bopp)\" target=\"_blank\" rel=\"noopener\">C\/1995 O1 (Hale-Bopp)<\/a>. Dans cette famille, on range tous les astres chevelus dont la p\u00e9riode orbitale est sup\u00e9rieure \u00e0 200 ans. <!--more--><\/p>\n<h5>Conditions de visibilit\u00e9 :<\/h5>\n<p>Depuis quelques nuits, C\/2025 R3 est \u00e0 la port\u00e9e des amateurs de com\u00e8tes. Une opportunit\u00e9 que n&#8217;a pas manqu\u00e9 de saisir <a href=\"https:\/\/www.facebook.com\/photo?fbid=10163949584603879&amp;set=a.10153951960733879\" target=\"_blank\" rel=\"noopener\">Julien De Winter<\/a> depuis\u00a0<a href=\"https:\/\/starfront.space\/\" target=\"_blank\" rel=\"noopener\">Starfront Observatories<\/a> au Texas :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet.jpg\" rel=\"lightbox[22637]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22638\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet-450x267.jpg\" alt=\"\" width=\"450\" height=\"267\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet-450x267.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet-1024x607.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet-768x455.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/comet.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Cet astrophotographe nous avait d\u00e9j\u00e0 r\u00e9gal\u00e9 il y a quelques mois avec une vid\u00e9o de la com\u00e8te <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/11\/11\/en-video-quand-le-vent-solaire-rencontre-la-comete-lemmon\/\" target=\"_blank\" rel=\"noopener\">C\/2025 A6 (Lemmon)<\/a>. Th\u00e9oriquement, C\/2025 R3 pourrait \u00eatre visible \u00e0 l&#8217;\u0153il nu, puisqu&#8217;elle affiche une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de 5,6 (pr\u00e9visions de <a href=\"https:\/\/astro.vanbuitenen.nl\/comet\/2025R3\" target=\"_blank\" rel=\"noopener\">G. van Buitenen<\/a>). En pratique, ce n&#8217;est pas le cas. D&#8217;abord parce que la com\u00e8te est tr\u00e8s basse sur l&#8217;horizon Est avant l&#8217;aube du c\u00f4t\u00e9 de P\u00e9gase :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell.jpg\" rel=\"lightbox[22637]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22640\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell-450x302.jpg\" alt=\"\" width=\"450\" height=\"302\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell-450x302.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell-1024x687.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell-768x516.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/04\/stell.jpg 1065w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Ensuite parce qu&#8217;il faut compter avec la Lune (en Dernier quartier le 10). il faut donc 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> ou 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> pour la localiser en toute fin de nuit. Les jours prochains, l&#8217;\u00e9clat de la Lune va d\u00e9cro\u00eetre, la com\u00e8te se rapprochant de l&#8217;horizon, tout en augmentant sa luminosit\u00e9. Apr\u00e8s son passage au <a href=\"https:\/\/fr.wikipedia.org\/wiki\/P%C3%A9rih%C3%A9lie\" target=\"_blank\" rel=\"noopener\">p\u00e9rih\u00e9lie<\/a> le 19 avril, elle redeviendra visible au cr\u00e9puscule pour les observateurs de l&#8217;h\u00e9misph\u00e8re Sud.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/comet.jpg\" rel=\"lightbox[22637]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22621\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/comet-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/comet-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/comet-768x477.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/03\/comet.jpg 962w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/03\/25\/printemps-1996-la-comete-hyakutake-fait-le-spectacle\/\" target=\"_blank\" rel=\"noopener\">Mars 1996 : la com\u00e8te Hyakutake illumine le ciel nocturne<\/a><\/li>\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\/02\/14\/nouvelle-eruption-sur-la-comete-29p-schwassmann-wachmann\/\" target=\"_blank\" rel=\"noopener\">Nouvelle \u00e9ruption sur la com\u00e8te 29P\/Schwassmann-Wachmann<\/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>Actuellement dans la constellation de P\u00e9gase, C\/2025 R3 (PANSTARRS) est la nouvelle coqueluche des chasseurs de com\u00e8tes. Une com\u00e8te en chasse une autre : C\/2025 R3 (PANSTARRS) a vite fait oublier C\/2026 A1 (MAPS), qui s&#8217;est volatilis\u00e9e le 4 avril en fr\u00f4lant le\u00a0Soleil. Place donc \u00e0 un nouvel astre chevelu, d\u00e9couvert le 8 septembre 2025 &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/04\/07\/la-comete-c-2025-r3-panstarrs-entre-en-scene\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La com\u00e8te C\/2025 R3 (PANSTARRS) entre en sc\u00e8ne<\/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":22638,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3949,93,3843],"class_list":["post-22637","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-c-2025-r3-panstarrs","tag-comete","tag-julien-de-winter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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