{"id":30705,"date":"2025-03-01T17:18:48","date_gmt":"2025-03-01T16:18:48","guid":{"rendered":"https:\/\/www.astrobreuillet.fr\/wordpress\/?p=30705"},"modified":"2025-03-01T17:18:48","modified_gmt":"2025-03-01T16:18:48","slug":"ngc1499-nebuleuse-de-la-californie","status":"publish","type":"post","link":"https:\/\/www.astrobreuillet.fr\/wordpress\/?p=30705","title":{"rendered":"NGC1499 &#8211; N\u00e9buleuse de la Californie"},"content":{"rendered":"<p>Views: 228<\/p><p>Cyril NOGER<\/p><p>Elle est situ\u00e9e dans la constellation de Pers\u00e9e. Elle a \u00e9t\u00e9 nomm\u00e9e ainsi car sa forme ressemble approximativement \u00e0 celle de l&#8217;\u00e9tat de la Californie. D&#8217;une longueur d&#8217;environ 70 ann\u00e9es-lumi\u00e8re, NGC 1499 se trouve \u00e0 environ 1 500 ann\u00e9es-lumi\u00e8re de la Terre, ce qui fait d&#8217;elle l&#8217;une des r\u00e9gions HII les plus proches du syst\u00e8me solaire.<br \/>\nEn raison de sa tr\u00e8s faible magnitude surfacique, il est extr\u00eamement difficile de l&#8217;observer visuellement, mais constitue une cible de choix pour les astrophotographes.<br \/>\nCette photo est le r\u00e9sultat de l&#8217;empilement de 1h47m30s de poses individuelles de 30s avec une lunette de 500mm de focale au total.<br \/>\nUn filtre bande \u00e9troite a \u00e9t\u00e9 utilis\u00e9 entre la lunette et l&#8217;appareil photo pour ne retenir que les longueurs d&#8217;onde de l&#8217;hydrog\u00e8ne (Ha) et de l&#8217;Oxyg\u00e8ne (O3) (extr\u00eamement peu d&#8217;oxyg\u00e8ne ici).<\/p>\n<p>La palette de couleurs FORAXX est utilis\u00e9e ici pour essayer de faire ressortir les n\u00e9bulosit\u00e9s les plus brillantes (en jaune).<\/p>\n<p>EXIFs:<br \/>\nSONY A7Sd modifi\u00e9 Astrodon<br \/>\nLunette ASKAR FRA500, F\/5.6<br \/>\nFiltre IDAS NBZ<br \/>\n46 Darks, 52 Offsets, 27 Flats<br \/>\n215 Images de 30s \u00e0 3200iso<\/p>\n<p>Logiciel utilis\u00e9 : Pixinsight<\/p>\n<p><a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/03\/FindingChart-1.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/03\/FindingChart-1-150x150.jpg\" width=\"150\" height=\"150\" alt=\"FindingChart-1.jpg\" style=\"display:inline-block\" \/><\/a> <a href=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/03\/NGC1499_Orton_Glow_Foraxx_ps_CAB-0-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.astrobreuillet.fr\/wordpress\/wp-content\/uploads\/2025\/03\/NGC1499_Orton_Glow_Foraxx_ps_CAB-0-150x150.jpg\" width=\"150\" height=\"150\" alt=\"NGC1499_Orton_Glow_Foraxx_ps_CAB-0.jpg\" style=\"display:inline-block\" \/><\/a> <\/p>","protected":false},"excerpt":{"rendered":"<p>Views: 228Cyril NOGERElle est situ\u00e9e dans la constellation de Pers\u00e9e. Elle a \u00e9t\u00e9 nomm\u00e9e ainsi car sa forme ressemble approximativement \u00e0 celle de l&#8217;\u00e9tat de la Californie. D&#8217;une longueur d&#8217;environ 70 ann\u00e9es-lumi\u00e8re, NGC 1499 se trouve \u00e0 environ 1 500 ann\u00e9es-lumi\u00e8re de la Terre, ce qui fait d&#8217;elle l&#8217;une des r\u00e9gions HII les plus proches [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":30707,"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":[152],"tags":[],"class_list":["post-30705","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\/30705"}],"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=30705"}],"version-history":[{"count":1,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30705\/revisions"}],"predecessor-version":[{"id":30706,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/30705\/revisions\/30706"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/30707"}],"wp:attachment":[{"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=30705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=30705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astrobreuillet.fr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=30705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}