{"id":30739,"date":"2025-05-25T18:07:10","date_gmt":"2025-05-25T16:07:10","guid":{"rendered":"https:\/\/www.astrobreuillet.fr\/wordpress\/?p=30739"},"modified":"2025-09-05T10:57:22","modified_gmt":"2025-09-05T08:57:22","slug":"la-galaxie-du-moulinet-m101","status":"publish","type":"post","link":"https:\/\/www.astrobreuillet.fr\/wordpress\/?p=30739","title":{"rendered":"La galaxie du Moulinet (M101)"},"content":{"rendered":"<p>Views: 164<\/p><p>Alain Juncker<\/p><p>Situ\u00e9e dans la constellation de la Grande Ourse, <strong>M 101<\/strong> est une galaxie d&#8217;un diam\u00e8tre apparent un peu moins grand que celui de la lune. Elle n&#8217;est malheureusement pas visible \u00e0 l&#8217;\u0153il nu, m\u00eame si on peut la deviner aux jumelles.<\/p>\n<p>C&#8217;est une galaxie spirale de grande taille situ\u00e9e \u00e0 23 millions d&#8217;ann\u00e9es-lumi\u00e8re d&#8217;un diam\u00e8tre de 170000 ann\u00e9es-lumi\u00e8re soit \u00e0 peu pr\u00e8s 70% plus grande que notre galaxie. Nous avons la chance qu&#8217;elle soit visible de face. On distingue bien ses bras spiraux assez d\u00e9tach\u00e9s qui lui ont valu son surnom de<strong> galaxie du Moulinet.<\/strong><\/p>\n<p>L&#8217;image pr\u00e9sent\u00e9e ici est constitu\u00e9e de deux s\u00e9ries d&#8217;images<\/p>\n<ul>\n<li>Une s\u00e9rie prise sans filtre constitu\u00e9e de 106 poses de 5mn soit 8h50 de poses cumul\u00e9es<\/li>\n<li>Une s\u00e9rie prise avec un filtre H\u03b1 Oiii (Hydrog\u00e8ne alpha et Oxyg\u00e8ne 3) constitu\u00e9e de 21 poses de 10mn soit 3H30 de poses.<\/li>\n<\/ul>\n<p><strong>Soit au total 12h20 de poses.<\/strong><\/p>\n<p>Les images prises avec le filtre H\u03b1 Oiii permettent de faire ressortir les n\u00e9buleuses de la galaxie qui rayonnent dans l&#8217;Hydrog\u00e8ne. Ce sont les n\u00e9bulosit\u00e9s rose rouge que l&#8217;on voit dans l&#8217;image.<\/p>\n<p><strong>D\u00e9tails de la photo<\/strong><\/p>\n<ul>\n<li>Cam\u00e9ra ZWO ASI 2600 MC (refroidie \u00e0 -20\u00b0C)<\/li>\n<li>Lunette Skywatcher 80 ED ( 600 mm\u00a0 F\/7.5)<\/li>\n<li>Filtre Optolong L-Ultimate (H\u03b1:3nm, Oiii:3nm)<\/li>\n<li>25 Flats, 50 Darks, 100 Offsets<\/li>\n<li>106 images de 300s<\/li>\n<li>21 images de 600s<\/li>\n<li>Traitement avec le logiciel Pixinsight<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/05\/M101_loc-1.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/05\/M101_loc-1-150x150.jpg\" width=\"150\" height=\"150\" alt=\"M101_loc-1.jpg\" style=\"display:inline-block\" \/><\/a> <a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/05\/M101_Ha_V2-0.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/05\/M101_Ha_V2-0-150x150.jpg\" width=\"150\" height=\"150\" alt=\"M101_Ha_V2-0.jpg\" style=\"display:inline-block\" \/><\/a> <\/p>","protected":false},"excerpt":{"rendered":"<p>Views: 164Alain JunckerSitu\u00e9e dans la constellation de la Grande Ourse, M 101 est une galaxie d&#8217;un diam\u00e8tre apparent un peu moins grand que celui de la lune. Elle n&#8217;est malheureusement pas visible \u00e0 l&#8217;\u0153il nu, m\u00eame si on peut la deviner aux jumelles. C&#8217;est une galaxie spirale de grande taille situ\u00e9e \u00e0 23 millions d&#8217;ann\u00e9es-lumi\u00e8re [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":30741,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_s2mail":"yes","footnotes":""},"categories":[152],"tags":[],"class_list":["post-30739","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-galerie-photo-2025","et-has-post-format-content","et_post_format-et-post-format-standard"],"_links":{"self":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30739"}],"collection":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=30739"}],"version-history":[{"count":2,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30739\/revisions"}],"predecessor-version":[{"id":30847,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30739\/revisions\/30847"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/30741"}],"wp:attachment":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}