{"id":30279,"date":"2022-11-15T19:24:26","date_gmt":"2022-11-15T18:24:26","guid":{"rendered":"http:\/\/www.astrobreuillet.fr\/wordpress\/?p=30279"},"modified":"2022-11-15T19:24:26","modified_gmt":"2022-11-15T18:24:26","slug":"nebuleuse-de-la-rosette-ngc-2244-retravaillee-avec-une-palette-de-couleurs-hoo","status":"publish","type":"post","link":"https:\/\/www.astrobreuillet.fr\/wordpress\/?p=30279","title":{"rendered":"N\u00e9buleuse de la Rosette (NGC 2244) retravaill\u00e9e avec une palette de couleurs HOO"},"content":{"rendered":"<p>Views: 275<\/p><p>Cyril NOGER<\/p><p>Cette image qui date de mars 2022 (prise sur la terrasse de l&#8217;observatoire TJMS de Buthiers) a \u00e9t\u00e9 modifi\u00e9e pour essayer de faire appara\u00eetre l&#8217;Oxyg\u00e8ne dans cet objet.<br \/>\nAu lieu des couches de couleurs conventionnelles RVB, l&#8217;image a \u00e9t\u00e9 travaill\u00e9e comme s&#8217;il s&#8217;agissait d&#8217;une image en RVV.<br \/>\nUn filtre narrow band, plac\u00e9 entre le capteur de l&#8217;appareil photo et la lunette astronomique, a permis de filtrer uniquement les longueurs d&#8217;onde de l&#8217;Hydrog\u00e8ne alfa (H) et de l&#8217;Oxyg\u00e8ne 3 (O).<br \/>\nLa couche R correspond donc \u00e0 l&#8217;Hydrog\u00e8ne alfa et la dynamique de la couche V a \u00e9t\u00e9 \u00e9tendue pour correspondre \u00e0 celle de la couche R (qui contient bien plus de signal que les couches V et B sur cet objet c\u00e9leste). S&#8217;en suit alors une suite d&#8217;op\u00e9rations pour r\u00e9int\u00e9grer les couches RVV pour obtenir l&#8217;\u00e9quivalent d&#8217;une image en HOO.<br \/>\n300 images de 30s de pose \u00e0 3200 iso (soit 2H30 de pose)<br \/>\nLunette ASKAR FRA500 (500mm de focale)<br \/>\nSony A7s d\u00e9filtr\u00e9 Astrodon<br \/>\nFiltre IDAS NBZ (dual narrow band)<br \/>\nMonture Skywatcher HEQ5 Pro GoTo<br \/>\nTraitement complet avec le logiciel Pixinsight<\/p>\n<p><a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2022\/11\/BlendNew2_FindingChart-1-YiQRa6wxFnZc.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2022\/11\/BlendNew2_FindingChart-1-YiQRa6wxFnZc-150x150.jpg\" width=\"150\" height=\"150\" alt=\"BlendNew2_FindingChart-1.jpg\" style=\"display:inline-block\" \/><\/a> <a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2022\/11\/Nebuleuse-de-la-Rosette_NGC2244_AS7s_ASKAR-FRA500_300x30s_3200iso_HOO_Cyril-NOGER_CAB-0-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2022\/11\/Nebuleuse-de-la-Rosette_NGC2244_AS7s_ASKAR-FRA500_300x30s_3200iso_HOO_Cyril-NOGER_CAB-0-150x150.jpg\" width=\"150\" height=\"150\" alt=\"Nebuleuse-de-la-Rosette_NGC2244_AS7s_ASKAR-FRA500_300x30s_3200iso_HOO_Cyril-NOGER_CAB-0.jpg\" style=\"display:inline-block\" \/><\/a> <\/p>","protected":false},"excerpt":{"rendered":"<p>Views: 275Cyril NOGERCette image qui date de mars 2022 (prise sur la terrasse de l&#8217;observatoire TJMS de Buthiers) a \u00e9t\u00e9 modifi\u00e9e pour essayer de faire appara\u00eetre l&#8217;Oxyg\u00e8ne dans cet objet. Au lieu des couches de couleurs conventionnelles RVB, l&#8217;image a \u00e9t\u00e9 travaill\u00e9e comme s&#8217;il s&#8217;agissait d&#8217;une image en RVV. Un filtre narrow band, plac\u00e9 entre [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":30281,"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":"","footnotes":""},"categories":[138],"tags":[],"class_list":["post-30279","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-galerie-2022","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\/30279"}],"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=30279"}],"version-history":[{"count":1,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30279\/revisions"}],"predecessor-version":[{"id":30280,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30279\/revisions\/30280"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/30281"}],"wp:attachment":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}