{"id":2597,"date":"2026-04-19T18:18:05","date_gmt":"2026-04-19T16:18:05","guid":{"rendered":"https:\/\/vega78astronomie.fr\/?p=2597"},"modified":"2026-04-19T18:21:30","modified_gmt":"2026-04-19T16:21:30","slug":"ic443-la-nebuleuse-de-la-meduse","status":"publish","type":"post","link":"https:\/\/vega78astronomie.fr\/index.php\/2026\/04\/19\/ic443-la-nebuleuse-de-la-meduse\/","title":{"rendered":"IC443, la n\u00e9buleuse de la M\u00e9duse"},"content":{"rendered":"\n<p>IC443, appel\u00e9e \u00ab n\u00e9buleuse de la M\u00e9duse \u00bb, est un r\u00e9manent de supernova situ\u00e9 dans la constellation des G\u00e9meaux, pr\u00e8s de l\u2019\u00e9toile brillante \u03b7 Geminorum. Sa distance et son \u00e2ge restent tr\u00e8s incertains : elle serait situ\u00e9e entre 2800 et 8000 ann\u00e9es-lumi\u00e8re et daterait de 3000 \u00e0 30 000 ans. &nbsp;Sa taille apparente dans le ciel d\u00e9passe celle de la Lune (50\u2032 x 40\u2032).&nbsp;<\/p>\n\n\n\n<p>&nbsp;La n\u00e9buleuse interagit fortement avec des nuages de gaz environnants, influen\u00e7ant sa forme et son \u00e9volution. Dans certaines zones denses, l\u2019expansion est ralentie (30 \u00e0 40 km\/s), tandis que dans des r\u00e9gions moins denses, elle reste plus rapide (80 \u00e0 100 km\/s). Enfin, une bande sombre visible correspond \u00e0 un nuage de poussi\u00e8re qui att\u00e9nue la lumi\u00e8re entre la n\u00e9buleuse et la Terre<\/p>\n\n\n\n<p>Voici une image r\u00e9sultat d&rsquo;environ 19h d&rsquo;images avec des Seestars S30pro en filtre bibande (Pascal, Emmanuel, Laurent, Jean-Paul) prises courant mars 2026, Traitement : Pixinsight<\/p>\n\n\n\n<p>Un des int\u00e9r\u00eats de cette image r\u00e9side dans le fait qu&rsquo;elle a \u00e9t\u00e9 r\u00e9alis\u00e9e en <strong>cumulant les poses<\/strong> effectu\u00e9es en mars par 4 membres (Pascal, Emmanuel, Laurent, Jean-Paul) avec des <strong>Seestar S30 Pro<\/strong> en filtre dual band, pour un total de <strong>19 heures<\/strong>. Un beau traitement r\u00e9alis\u00e9 par Jean-Paul sous Pixinsight nous donne cette tr\u00e8s belle image qui d\u00e9montre ce que l&rsquo;on peut obtenir avec les t\u00e9lescopes automatis\u00e9s d&rsquo;aujourd&rsquo;hui.<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"980\" height=\"1024\" src=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-980x1024.jpg\" alt=\"\" class=\"wp-image-2598\" srcset=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-980x1024.jpg 980w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-287x300.jpg 287w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-768x802.jpg 768w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-100x104.jpg 100w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-1471x1536.jpg 1471w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418-192x200.jpg 192w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2026\/04\/IC443_S30Pro-Vega-20260418.jpg 1532w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><figcaption class=\"wp-element-caption\"><em>Prises de vue Emmanuel Valin, Pascal Berteau, Jean-Paul Qu\u00e9au, Laurent Couvet. Traitement Jean-Paul Qu\u00e9au<\/em><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>IC443, appel\u00e9e \u00ab n\u00e9buleuse de la M\u00e9duse \u00bb, est un r\u00e9manent de supernova situ\u00e9 dans la constellation des G\u00e9meaux, pr\u00e8s de l\u2019\u00e9toile brillante \u03b7 Geminorum. Sa distance et son \u00e2ge restent tr\u00e8s incertains : elle serait situ\u00e9e entre 2800 et 8000 ann\u00e9es-lumi\u00e8re et daterait de 3000 \u00e0 30 000 ans. &nbsp;Sa taille apparente dans le [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[133,134],"class_list":["post-2597","post","type-post","status-publish","format-standard","hentry","category-ciel-profond","tag-ic443","tag-meduse"],"_links":{"self":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/comments?post=2597"}],"version-history":[{"count":2,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2597\/revisions"}],"predecessor-version":[{"id":2601,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2597\/revisions\/2601"}],"wp:attachment":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/categories?post=2597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/tags?post=2597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}