{"id":7896,"date":"2005-01-13T12:34:32","date_gmt":"2005-01-13T12:34:32","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/orion\/"},"modified":"2025-06-19T19:20:08","modified_gmt":"2025-06-19T17:20:08","slug":"orion","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/orion\/","title":{"rendered":"Orion"},"content":{"rendered":"

Auteur: Didier Keus (dk31t5@skynet.be)<\/p>\n

Voici trois r\u00e9sultats de la superbe soir\u00e9e du 09 au 10 d\u00e9cembre \u00e0 la Fosse.
\nJean Luc Mairlot et Pierre Ponsart \u00e9taient d\u00e9j\u00e0 aff\u00e9r\u00e9s \u00e0 de nombreuses prises de vue lorsque Jean Marc Gillard et moi-m\u00eame avons d\u00e9barqu\u00e9 sur le terrain vers 22 heures.
\nLe temps d\u2019installer le mat\u00e9riel, de faire un peu de visuel et de constater que le ciel est bien noir mais tr\u00e8s turbulent, et je tente d\u2019immortaliser quelques joyaux de la constellation d\u2019Orion, la grande n\u00e9buleuse M42 ainsi que la t\u00eate de cheval, le tout avec la ST-10 au foyer le la lunette AP 130 @ f\/6 sur la monture 900 GTO.<\/p>\n

La grande n\u00e9buleuse d\u2019Orion, prise lorsque la turbulence sera au plus calme, entre 1 et 3 heures du matin :
\n10 poses de 150 secondes en binning 1×1 avec un filtre Halpha pour la luminance :<\/p>\n

\"\"<\/a>
\nDDP, addition logarithmique, masque flou, niveaux.<\/p>\n

Ajout de 7 poses de 75 secondes en binning 2×2 dans le rouge et vert, 7 poses de 112.5 secondes dans le bleu pour la version couleur :<\/p>\n

\"\"<\/a>
\nMerci \u00e0 Pierre Henrotay pour l\u2019alignement des images LRGB.
\nNiveaux, contraste, r\u00e9duction du blooming, l\u00e9g\u00e8re saturation des couleurs.<\/p>\n

Apr\u00e8s un changement de batterie et rep\u00e9rage manuel en toute fin de nuit, 10 poses de 2 minutes en H alpha uniquement (il se fait tard) pour la t\u00eate de cheval :<\/p>\n

\"\"<\/a>
\nNiveaux, r\u00e9duction du blooming et bruit.<\/p>\n

Je profitais de faire un peu de visuel entres les poses, notamment avec le 250 mm de Jean Marc.
\nFin des observations \u00e0 5 heures de matin ; ciel toujours noir, temp\u00e9rature l\u00e9g\u00e8rement n\u00e9gative.<\/p>\n

Didier<\/p>\n\n\n

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

Auteur: Didier Keus (dk31t5@skynet.be) Voici trois r\u00e9sultats de la superbe soir\u00e9e du 09 au 10 d\u00e9cembre \u00e0 la Fosse. Jean Luc Mairlot et Pierre Ponsart \u00e9taient d\u00e9j\u00e0 aff\u00e9r\u00e9s \u00e0 de nombreuses prises de vue lorsque Jean Marc Gillard et moi-m\u00eame avons d\u00e9barqu\u00e9 sur le terrain vers 22 heures. Le temps d\u2019installer le mat\u00e9riel, de faire […]<\/p>\n","protected":false},"author":7,"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-7896","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/7896","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=7896"}],"version-history":[{"count":2,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/7896\/revisions"}],"predecessor-version":[{"id":15236,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/7896\/revisions\/15236"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=7896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=7896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=7896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}