{"id":10079,"date":"2019-09-17T16:58:23","date_gmt":"2019-09-17T16:58:23","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/le-fantome-de-cassiopee-ic63\/"},"modified":"2025-06-08T22:44:59","modified_gmt":"2025-06-08T20:44:59","slug":"le-fantome-de-cassiopee-ic63","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/le-fantome-de-cassiopee-ic63\/","title":{"rendered":"Le fant\u00f4me de Cassiop\u00e9e – IC63"},"content":{"rendered":"

Bonsoir, on ne f\u00eate pas encore Halloween mais … voici le Fant\u00f4me de Cassiop\u00e9e (ou IC63 pour les intimes).
\nL’\u00e9toile brillante un peu \u00e0 gauche s’appelle Gamma Cassiop\u00e9e, c’est une \u00e9toile g\u00e9ante.
\nFacile \u00e0 trouver \u00e0 l’oeil nu, elle se situe au milieu du fameux \u00ab\u00a0W\u00a0\u00bb de la constellation.
\nLors de missions spatiales, elle est parfois utilis\u00e9e comme point de navigation. L’astronaute am\u00e9ricain Virgil Ivan \u00ab\u00a0Gus\u00a0\u00bb Grissom la surnomma Navi (faisant r\u00e9f\u00e9rence \u00e0 son 2\u00e8me pr\u00e9nom \u00e9crit \u00e0 l’envers).
\nMais revenons au fant\u00f4me \u00e0 droite… La couleur bleue de la n\u00e9buleuse provient de la lumi\u00e8re de l’\u00e9toile qui se refl\u00e8te dans les nuages de poussi\u00e8re tandis que la couleur rouge provient de l’hydrog\u00e8ne bombard\u00e9 par la radiation ultraviolette de Gamma Cassiop\u00e9e.
\nD\u00e9tails de prises de vue: 46 poses de 46 sec \u00e0 la focale de 560mm au t\u00e9lescope de 280mm de diam \u00e0 F2.
\nCam\u00e9ra Zwo Asi 1600 couleur refroidie \u00e0 -20\u00b0C
\nFiltre anti-pollution lumineuse LPS-D2.<\/p>\n

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

PS: le rond bleu \u00e0 droite de la n\u00e9buleuse doit \u00eatre un artefact, c’est certainement le reflet de l’\u00e9toile tr\u00e8s brillante dans le syst\u00e8me optique.<\/p>\n\n\n

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

Bonsoir, on ne f\u00eate pas encore Halloween mais … voici le Fant\u00f4me de Cassiop\u00e9e (ou IC63 pour les intimes). L’\u00e9toile brillante un peu \u00e0 gauche s’appelle Gamma Cassiop\u00e9e, c’est une \u00e9toile g\u00e9ante. Facile \u00e0 trouver \u00e0 l’oeil nu, elle se situe au milieu du fameux \u00ab\u00a0W\u00a0\u00bb de la constellation. Lors de missions spatiales, elle est […]<\/p>\n","protected":false},"author":1,"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-10079","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10079","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10079"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10079\/revisions"}],"predecessor-version":[{"id":11604,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10079\/revisions\/11604"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}