{"id":17223,"date":"2026-08-12T21:54:03","date_gmt":"2026-08-12T19:54:03","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/?p=17223"},"modified":"2026-08-12T22:37:53","modified_gmt":"2026-08-12T20:37:53","slug":"croissant-de-soleil-a-19h55-18-minute-avant-le-maximum","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/croissant-de-soleil-a-19h55-18-minute-avant-le-maximum\/","title":{"rendered":"Croissant de soleil \u00e0 19h55…18 minute avant le maximum."},"content":{"rendered":"

Bonjour.<\/p>\n

Je n’ai pas pu me d\u00e9placer, j’ai fait la photo de Hannut.<\/p>\n

On devine un peu le relief lunaire en ombre chinoise.<\/p>\n

Notez la terre \u00e0 l’\u00e9chelle du soleil dans le coin sup\u00e9rieur gauche (image ajout\u00e9e artificiellement \u00e9videmment)<\/p>\n

D\u00e9tails techniques :
\n– lunette solaire Heliostar de 100 mm de diam\u00e8tre, focale 760
\n– cam\u00e9ra Asi 183 Mono (Gain=0; Exposition=4.6 ms; Dur\u00e9e du film=15 secondes) \u00e0 21,4906 images par seconde.
\n– filtre arri\u00e8re BF Alluxa ultra-\u00e9troit, bande passante de 10 A centr\u00e9e sur H-alpha
\nNB configuration photo, ne convient pas pour l’observation \u00e0 l’oculaire<\/p>\n

Traitement de l’image :
\nL’image est en fait le r\u00e9sultat de l’empilement sous le logiciel AS4 des 20 meilleures images du film.
\nCette image est trait\u00e9e classiquement par des logiciels d’imagerie.
\nD\u00e9convolution (Imppg), masque flou dans Photoshop et process \u00ab\u00a0Solar tool box\u00a0\u00bb dans Pixinsight pour faire ressortir les filaments et protub\u00e9rance.<\/p>\n

Marc.<\/p>\n

 <\/p>\n

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

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\n 10\/10 - (8 votes) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Bonjour. Je n’ai pas pu me d\u00e9placer, j’ai fait la photo de Hannut. On devine un peu le relief lunaire en ombre chinoise. Notez la terre \u00e0 l’\u00e9chelle du soleil dans le coin sup\u00e9rieur gauche (image ajout\u00e9e artificiellement \u00e9videmment) D\u00e9tails techniques : – lunette solaire Heliostar de 100 mm de diam\u00e8tre, focale 760 – cam\u00e9ra […]<\/p>\n","protected":false},"author":17,"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-17223","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/17223","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\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=17223"}],"version-history":[{"count":5,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/17223\/revisions"}],"predecessor-version":[{"id":17230,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/17223\/revisions\/17230"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=17223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=17223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=17223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}