{"id":9469,"date":"2013-06-19T06:56:40","date_gmt":"2013-06-19T06:56:40","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/ngc7023-la-nebuleuse-iris\/"},"modified":"2025-06-08T22:46:36","modified_gmt":"2025-06-08T20:46:36","slug":"ngc7023-la-nebuleuse-iris","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/ngc7023-la-nebuleuse-iris\/","title":{"rendered":"NGC7023, la N\u00e9buleuse IRIS"},"content":{"rendered":"

D\u00e9couverte par William Herschel le 18 octobre 1794, la n\u00e9buleuse NGC 7023 (IRIS NEBULA) est aujourd’hui d\u00e9sign\u00e9e comme un amas stellaire avec la n\u00e9buleuse LBN 487.
\nSitu\u00e9e dans la constellation C\u00e9ph\u00e9e \u00e0 environ 1300 ann\u00e9es lumi\u00e8re de la Terre, en bordure de la Voie Lact\u00e9e, cette n\u00e9buleuse est un remarquable exemple de la classe des n\u00e9buleuses par r\u00e9flexion. Une \u00e9toile bleue tr\u00e8s chaude de magnitude 7 (SAO 19158 ou HD200775) \u00e9claire par r\u00e9flexion une partie d\u2019un vaste nuage mol\u00e9culaire fait de poussi\u00e8res, d\u2019o\u00f9 la couleur de la n\u00e9bulosit\u00e9, du m\u00eame type que les n\u00e9bulosit\u00e9s des c\u00e9l\u00e8bres Pl\u00e9iades.<\/p>\n

\"\"<\/a><\/p>\n

Le clich\u00e9 pr\u00e9sent\u00e9 ici \u00e0 50% de sa taille d’acquisition a \u00e9t\u00e9 fait depuis l\u2019observatoire de La Fosse ces vendredi 14 et samedi 15 juin 2013 avec un APN Canon 350D modifi\u00e9 r\u00e9gl\u00e9 \u00e0 400 ISO plac\u00e9 au foyer du t\u00e9lescope ASA de 305 mm de diam\u00e8tre de l’observatoire. Deux heures vingt de pose (28 x 5 minutes) ont \u00e9t\u00e9 trait\u00e9es sous IRIS puis finalis\u00e9es sous Photoshop CS2 et Paint Shop Pro7 pour obtenir ce r\u00e9sultat. Outre la brillante n\u00e9buleuse IRIS, le champ entier de la photo laisse entrevoir les nuages obscurs ou faiblement lumineux qui couvrent tout le champ.
\nJean-Luc<\/p>\n\n\n

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\n Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

D\u00e9couverte par William Herschel le 18 octobre 1794, la n\u00e9buleuse NGC 7023 (IRIS NEBULA) est aujourd’hui d\u00e9sign\u00e9e comme un amas stellaire avec la n\u00e9buleuse LBN 487. Situ\u00e9e dans la constellation C\u00e9ph\u00e9e \u00e0 environ 1300 ann\u00e9es lumi\u00e8re de la Terre, en bordure de la Voie Lact\u00e9e, cette n\u00e9buleuse est un remarquable exemple de la classe des […]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-9469","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=9469"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9469\/revisions"}],"predecessor-version":[{"id":12215,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9469\/revisions\/12215"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}