{"id":6349,"date":"2025-09-15T19:17:34","date_gmt":"2025-09-15T15:17:34","guid":{"rendered":"https:\/\/meteo974.fr\/?p=6349"},"modified":"2025-09-15T19:19:50","modified_gmt":"2025-09-15T15:19:50","slug":"une-comete-dans-le-ciel-reunionnais","status":"publish","type":"post","link":"https:\/\/meteo974.fr\/?p=6349","title":{"rendered":"Une com\u00e8te dans le ciel R\u00e9unionnais"},"content":{"rendered":"\n<div class=\"wp-block-cover\" style=\"margin-top:32px;margin-bottom:32px\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1280\" height=\"853\" class=\"wp-block-cover__image-background wp-image-6350 size-full\" alt=\"\" src=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/comete20250915A.png\" data-object-fit=\"cover\" srcset=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/comete20250915A.png 1280w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/comete20250915A-300x200.png 300w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/comete20250915A-1024x682.png 1024w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/comete20250915A-768x512.png 768w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#979ea6\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-center has-large-font-size\"><strong>Une com\u00e8te dans le ciel R\u00e9unionnais<\/strong><\/h2>\n<\/div><\/div>\n\n\n\n<p><strong>Une com\u00e8te a \u00e9t\u00e9 d\u00e9couverte tr\u00e8s r\u00e9cemment, le 12 septembre 2025, gr\u00e2ce \u00e0 l\u2019instrument SWAN (Solar Wind Anisotropies) du t\u00e9lescope spatial SOHO (ESA\/NASA). Elle devrait faire son show dans le ciel R\u00e9unionnais ces jours-ci. Explications.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img decoding=\"async\" width=\"800\" height=\"548\" src=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/547519482_1358264586283183_3540163709177369045_n-copie.png\" alt=\"\" class=\"wp-image-6351\" style=\"border-radius:12px\" srcset=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/547519482_1358264586283183_3540163709177369045_n-copie.png 800w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/547519482_1358264586283183_3540163709177369045_n-copie-300x206.png 300w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/547519482_1358264586283183_3540163709177369045_n-copie-768x526.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>Sch\u00e9ma <a href=\"https:\/\/www.facebook.com\/assoaar?__cft__[0]=AZV230SXgrlypJ3W_fP-dFWSc0lmK2iP6lTf5fM3vUGAK9IYYhWqPvHEwP2EjR_SIU_WmK6RzmIPQEwbikY3H4hqrYKB3UoedaC3c1YXOJXA6UAx4_HayuCFIpGIPrApHhjVT5LviD-eYOfsEAv-4bXdWBH_R6e3NK1bEqQCkseIoQtEsyqqP5MloIh5cl3F7h0N4t1Q6m_xSqOBe39509gt83VD5829DbNFKwArEcTgFd-atHQ_nz-nXxa1pt6MV25B_OW543rmyP9TvfPA9p0A&amp;__tn__=-UC*F\">Reunionbysa<\/a>t<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"774\" height=\"1024\" src=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-774x1024.png\" alt=\"\" class=\"wp-image-6352\" srcset=\"https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-774x1024.png 774w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-227x300.png 227w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-768x1016.png 768w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-1161x1536.png 1161w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow-1548x2048.png 1548w, https:\/\/meteo974.fr\/wp-content\/uploads\/2025\/09\/G0xBUaYWMAAKqow.png 1633w\" sizes=\"(max-width: 774px) 100vw, 774px\" \/><\/figure>\n\n\n\n<p><a href=\"https:\/\/www.google.com\/url?sa=i&amp;url=https%3A%2F%2Fx.com%2Fmarcoscalil&amp;psig=AOvVaw1lL1OuzET80IJxCOTJyn39&amp;ust=1758035627202000&amp;source=images&amp;cd=vfe&amp;opi=89978449&amp;ved=0CBkQjhxqFwoTCOjcipuH248DFQAAAAAdAAAAABAW\" target=\"_blank\" rel=\"noreferrer noopener\">Marcos Calil (@MarcosCalil) \/ X<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p>La com\u00e8te SWAN25B se situe actuellement \u00e0 environ 78 millions de kilom\u00e8tres de la Terre. Son p\u00e9rih\u00e9lie, point de la trajectoire d&rsquo;un objet c\u00e9leste en orbite h\u00e9liocentrique qui est le plus proche du Soleil, est tout juste franchi. Elle se d\u00e9voile d\u00e9sormais, sortie de l&rsquo;\u00e9blouissement solaire.<br>La com\u00e8te SWAN25B prend l&rsquo;aspect d&rsquo;une chevelure verte brillante et d&rsquo;une double tra\u00een\u00e9e (ions bleus et poussi\u00e8res). Son diam\u00e8tre est estim\u00e9 \u00e0 plus ou moins 10 kilom\u00e8tres.<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Quand et o\u00f9 l&rsquo;observer \u00e0 la R\u00e9union ?<\/h6>\n\n\n\n<p>La p\u00e9riode post-p\u00e9rih\u00e9lie s&rsquo;\u00e9tend du 15 au 25 septembre. Elle sera visible les soirs apr\u00e8s le coucher du Soleil, entre 18h30 et 19h15 environ en direction de l&rsquo;ouest-sud-ouest, tr\u00e8s bas sur l&rsquo;horizon (10-15 degr\u00e9s), entre Mars et Spica (constellation de la Vierge). <\/p>\n\n\n\n<p>Elle sera principalement visible depuis l&rsquo;ouest de la R\u00e9union, depuis les plages notamment o\u00f9 les points hauts avec un minimum de lumi\u00e8res parasites.<\/p>\n\n\n\n<p>Elle sera toutefois difficilement visible \u00e0 l&rsquo;oeil nu en raison d&rsquo;une magnitude un peu \u00e9lev\u00e9e, entre 7 et 8. Il faudrait une magnitude 6 pour la voir sans instruments. Il faudra s&rsquo;armer de jumelles ou d&rsquo;un t\u00e9lescope et pointer correctement sur elle pour pouvoir profiter du spectacle.<\/p>\n\n\n\n<p>Apr\u00e8s le 25 septembre, c&rsquo;est un peu l&rsquo;inconnu pour le moment. Elle pourrait s&rsquo;intensifier en terme de luminosit\u00e9, et se rapprochera au plus pr\u00e8s de nous dans le courant du mois d&rsquo;octobre, \u00e0 un peu moins de 40 millions de kilom\u00e8tre de nous.<\/p>\n\n\n\n<p>Il s\u2019agit d\u2019une com\u00e8te fra\u00eeche, observ\u00e9e pour la premi\u00e8re fois depuis l\u2019espace, maintenant visible depuis l\u2019h\u00e9misph\u00e8re Sud. La R\u00e9union est en premi\u00e8re ligne pour l\u2019admirer avant le reste du monde !<\/p>\n\n\n\n<p><strong>Conseils :<\/strong><\/p>\n\n\n\n<p>Arrivez 15 min avant le coucher du Soleil, laissez vos yeux s\u2019habituer \u00e0 l\u2019obscurit\u00e9 et balayez lentement l\u2019horizon. La vision d\u00e9cal\u00e9e (regarder l\u00e9g\u00e8rement \u00e0 c\u00f4t\u00e9 de la com\u00e8te) am\u00e9liore la perception des d\u00e9tails.<\/p>\n\n\n\n<p>\u00catre dans l\u2019ouest avec un horizon d\u00e9gag\u00e9 est la meilleure option pour avoir une chance de la voir aux jumelles pour le moment.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-a5331a9e wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\">\n<p class=\"has-text-align-left\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0b0e4f\" class=\"has-inline-color\">Cat\u00e9gories<\/mark><\/strong><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center has-text-color has-link-color wp-elements-f7e1b2246115720c497f5c40769fcee1 is-layout-flow wp-block-column-is-layout-flow\" style=\"color:#59d49c;flex-basis:66.66%\"><div style=\"padding-right:0;padding-left:0;padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\" class=\"taxonomy-post_tag wp-block-post-terms\"><a href=\"https:\/\/meteo974.fr\/?tag=astronomie\" rel=\"tag\">Astronomie<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=ciel\" rel=\"tag\">Ciel<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=comete\" rel=\"tag\">Com\u00e8te<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=la-reunion\" rel=\"tag\">la R\u00e9union<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=les-makes\" rel=\"tag\">Les Makes<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=lune\" rel=\"tag\">Lune<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=meteo\" rel=\"tag\">M\u00e9t\u00e9o<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=ocean-indien\" rel=\"tag\">Oc\u00e9an Indien<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=saint-benoit\" rel=\"tag\">Saint Benoit<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=saint-denis\" rel=\"tag\">Saint Denis<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=saint-paul\" rel=\"tag\">Saint Paul<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=saint-philippe\" rel=\"tag\">Saint Philippe<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=sainte-rose\" rel=\"tag\">Sainte Rose<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=savanne\" rel=\"tag\">Savanne<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=soleil\" rel=\"tag\">Soleil<\/a><span class=\"wp-block-post-terms__separator\"> | <\/span><a href=\"https:\/\/meteo974.fr\/?tag=swan25b\" rel=\"tag\">Swan25B<\/a><\/div><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\" style=\"margin-top:2rem;margin-bottom:2rem\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une com\u00e8te a \u00e9t\u00e9 d\u00e9couverte tr\u00e8s r\u00e9cemment, le 12 septembre 2025, gr\u00e2ce \u00e0 l\u2019instrument SWAN (Solar Wind Anisotropies) du t\u00e9lescope spatial SOHO (ESA\/NASA). Elle devrait faire son show dans le ciel R\u00e9unionnais ces jours-ci. Explications.<\/p>\n","protected":false},"author":2,"featured_media":6350,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4,8,5],"tags":[134,69,132,44,135,128,61,52,108,102,80,106,107,79,66,133],"class_list":["post-6349","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climat","category-meteo","category-ocean","tag-astronomie","tag-ciel","tag-comete","tag-la-reunion","tag-les-makes","tag-lune","tag-meteo","tag-ocean-indien","tag-saint-benoit","tag-saint-denis","tag-saint-paul","tag-saint-philippe","tag-sainte-rose","tag-savanne","tag-soleil","tag-swan25b"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Une com\u00e8te dans le ciel R\u00e9unionnais - M\u00e9t\u00e9o974<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/meteo974.fr\/?p=6349\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une com\u00e8te dans le ciel R\u00e9unionnais - M\u00e9t\u00e9o974\" \/>\n<meta property=\"og:description\" content=\"Une com\u00e8te a \u00e9t\u00e9 d\u00e9couverte tr\u00e8s r\u00e9cemment, le 12 septembre 2025, gr\u00e2ce \u00e0 l\u2019instrument SWAN (Solar Wind Anisotropies) du t\u00e9lescope spatial SOHO (ESA\/NASA). 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