{"id":10283,"date":"2021-11-20T17:47:21","date_gmt":"2021-11-20T17:47:21","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/sh2-157-en-fausses-couleurs\/"},"modified":"2025-06-08T22:44:26","modified_gmt":"2025-06-08T20:44:26","slug":"sh2-157-en-fausses-couleurs","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/sh2-157-en-fausses-couleurs\/","title":{"rendered":"Sh2-157 en fausses couleurs"},"content":{"rendered":"

Sh2-157 est une n\u00e9buleuse en \u00e9mission situ\u00e9e dans Cassiop\u00e9e (Lobster Claw, la pince de homard).<\/p>\n

L’image est le r\u00e9sultat de 60 poses de 4 minutes en Ha et de 38 poses de 4 minutes en OIII – sur plusieurs nuits bien s\u00fbr.
\nCalibration avec darks, flats, flatdark.<\/p>\n

La palette est HOO (rouge = Ha, vert et bleu = OIII).<\/p>\n

C’est pris avec une cam\u00e9ra CMOS monochrome ASI1600MMPro et des filtres Astronomik 12 nm.<\/p>\n

Televue NP127 avec r\u00e9ducteur de focale (FL=528 mm, 1 pixel=1.49 arcsec) sur monture AP Mach1 guid\u00e9e.<\/p>\n

La taille a \u00e9t\u00e9 r\u00e9duite \u00e0 33 %, qualit\u00e9 JPEG 75%.<\/p>\n

Le catalogue Sharpless (Sh) est d\u00fb \u00e0 l’astronome US Stewart Sharpless et contient 312 objets depuis 1959, tous des n\u00e9buleuses en \u00e9mission riches en hydrog\u00e8ne ionis\u00e9.<\/p>\n

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

Pierre<\/p>\n\n\n

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\n 10\/10 - (1 vote) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Sh2-157 est une n\u00e9buleuse en \u00e9mission situ\u00e9e dans Cassiop\u00e9e (Lobster Claw, la pince de homard). L’image est le r\u00e9sultat de 60 poses de 4 minutes en Ha et de 38 poses de 4 minutes en OIII – sur plusieurs nuits bien s\u00fbr. Calibration avec darks, flats, flatdark. La palette est HOO (rouge = Ha, vert […]<\/p>\n","protected":false},"author":15,"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-10283","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10283","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\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10283"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10283\/revisions"}],"predecessor-version":[{"id":11397,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10283\/revisions\/11397"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}