{"id":495,"date":"2020-09-18T12:08:20","date_gmt":"2020-09-18T10:08:20","guid":{"rendered":"https:\/\/www.forgeat.org\/?p=495"},"modified":"2022-07-02T08:03:04","modified_gmt":"2022-07-02T06:03:04","slug":"le-classique-de-lastrophotographie-m31-ou-la-galaxie-dandromede","status":"publish","type":"post","link":"https:\/\/www.forgeat.org\/index.php\/2020\/09\/18\/le-classique-de-lastrophotographie-m31-ou-la-galaxie-dandromede\/","title":{"rendered":"Le classique de l’astrophotographie: M31 ou la galaxie d’Androm\u00e8de"},"content":{"rendered":"\n

Bonjour, R\u00e9alis\u00e9 la nuit derni\u00e8re une prise de vue de M31, grande galaxie d’Androm\u00e8de. <\/p>\n\n\n\n

Materiel utilis\u00e9: T\u00e9l\u00e9scope sharpstar 150 HNT \u00e0 420mm de focale, cam\u00e9ra ASI 2600 refroidie \u00e0 -10\u00b0c et gain \u00e0 80 sous Ekos, monture HEQ5 sans autoguidage.<\/p>\n\n\n\n

270 images de 20 secondes retenues sur 320, traitement sous Siril seul, dark et flats r\u00e9alis\u00e9s. colorim\u00e9trie par astrom\u00e9trie sous Siril, accentuation de la saturation sous Siril.<\/p>\n\n\n\n

D’un point de vue technique je ne suis pas loin d’avoir trouv\u00e9 le bon tirage entre la cam\u00e9ra et le r\u00e9ducteur-correcteur.<\/p>\n\n\n\n

\"\"<\/a>
Recadrage (x=7, y=63, w=6013, h=4094)\nMiroir X\nPhotom\u00e9trie\nTransf. histogramme (mid=0.001, lo=0.001, hi=1.000)\nRehaussement de la saturation (quantit\u00e9=0.45)<\/figcaption><\/figure>\n\n\n\n

Une autre moins jaune et \u00e0 couleurs plus \u00ab\u00a0naturelles\u00a0\u00bb:<\/p>\n\n\n\n

\"\"<\/a>
Recadrage (x=27, y=61, w=6001, h=4114)\nNeutralisation du fond du ciel\n\u00c9talonnage des couleurs\nTransf. histogramme (mid=0.001, lo=0.001, hi=1.000)\n\u00c9talonnage des couleurs\nRehaussement de la saturation (quantit\u00e9=0.88)\nMiroir X<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Bonjour, R\u00e9alis\u00e9 la nuit derni\u00e8re une prise de vue de M31, grande galaxie d’Androm\u00e8de. Materiel utilis\u00e9: T\u00e9l\u00e9scope sharpstar 150 HNT \u00e0 420mm de focale, cam\u00e9ra ASI 2600 refroidie \u00e0 -10\u00b0c et gain \u00e0 80 sous Ekos, monture HEQ5 sans autoguidage. 270 images de 20 secondes retenues sur 320, traitement sous Siril seul, dark et flats … <\/p>\n

Continuer la lecture de « Le classique de l’astrophotographie: M31 ou la galaxie d’Androm\u00e8de »<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-495","post","type-post","status-publish","format-standard","hentry","category-imagerie-astronomique"],"_links":{"self":[{"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/posts\/495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/comments?post=495"}],"version-history":[{"count":2,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/posts\/495\/revisions"}],"predecessor-version":[{"id":499,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/posts\/495\/revisions\/499"}],"wp:attachment":[{"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/media?parent=495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/categories?post=495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.forgeat.org\/index.php\/wp-json\/wp\/v2\/tags?post=495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}