{"id":10041,"date":"2019-04-14T10:46:55","date_gmt":"2019-04-14T10:46:55","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/la-chaine-de-markarian\/"},"modified":"2025-06-08T22:45:02","modified_gmt":"2025-06-08T20:45:02","slug":"la-chaine-de-markarian","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/la-chaine-de-markarian\/","title":{"rendered":"la chaine de Markarian"},"content":{"rendered":"

bonjour,
\nj’ai tent\u00e9 cette suite de galaxie de la Vierge ces mercredi et jeudi 10 et 11 avril avec le canon 350d plac\u00e9 au foyer de la lunette Televue Genesis SDF sur la monture NJP, le tout sans autoguidage gr\u00e2ce au bon suivi naturel de la monture. 90 poses de 5 minutes (soit un total de 7hr30) ont \u00e9t\u00e9 utilis\u00e9es pour composer l’image, mais le clair de Lune pr\u00e9sent pendant pratiquement trois quart des poses n’a pas aid\u00e9 \u00e0 avoir un r\u00e9sultat correct. J’ai pour la premi\u00e8re fois utilis\u00e9 le logiciel SIRIL pour le pr\u00e9traitement via le script d\u00e9di\u00e9. Cela a tr\u00e8s bien fonctionn\u00e9 puisqu’il n’a fallu que 11 minutes 19 secondes pour obtenir l’image stack\u00e9e en partant des brutes (11 darks, 16 flats, 41 offsets et 90 poses).<\/p>\n

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

La cha\u00eene de Markarian est un ensemble de galaxies appartenant \u00e0 l’amas de la Vierge. Elle est nomm\u00e9e d’apr\u00e8s Benjamin Markarian qui a d\u00e9couvert qu’elles \u00e9taient anim\u00e9es d’un mouvement commun. La cha\u00eene comprend huit galaxies dont M84 (NGC 4374), M86 (NGC 4406), NGC 4477, NGC 4473, NGC 4461, NGC 4458, NGC 4438 et NGC 4435. De nombreuses autres galaxies sont visibles dans le champ mais ne font pas partie de cette association. J\u2019en ai annot\u00e9 certaines dans l\u2019image du champ extrait du planisph\u00e8re Sky6.
\nAh oui, une petite remarque en passant. Si M87 est bien visible en bas \u00e0 gauche de l’image, n’esp\u00e9rez pas voir le trou noir central sur mon image \ud83d\ude42
\n\"\"<\/a><\/p>\n

J-Luc<\/p>\n\n\n

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

bonjour, j’ai tent\u00e9 cette suite de galaxie de la Vierge ces mercredi et jeudi 10 et 11 avril avec le canon 350d plac\u00e9 au foyer de la lunette Televue Genesis SDF sur la monture NJP, le tout sans autoguidage gr\u00e2ce au bon suivi naturel de la monture. 90 poses de 5 minutes (soit un total […]<\/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-10041","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10041","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=10041"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10041\/revisions"}],"predecessor-version":[{"id":11639,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10041\/revisions\/11639"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}