{"id":10314,"date":"2022-04-01T08:10:23","date_gmt":"2022-04-01T08:10:23","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/la-galaxie-du-tourbillon-m51\/"},"modified":"2025-06-23T21:59:40","modified_gmt":"2025-06-23T19:59:40","slug":"la-galaxie-du-tourbillon-m51","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/la-galaxie-du-tourbillon-m51\/","title":{"rendered":"LA GALAXIE DU TOURBILLON (M51)"},"content":{"rendered":"

Auteur: Alain Pothen (pothen59@gmail.com)<\/p>\n

Mon second essai sur du ciel profond\u2026 et M51.
\nJ\u2019ai utilis\u00e9 ma lunette 150 ED F8, une cam\u00e9ra ASI294MM en bin2 \u00e0 -15 \u00b0C et ai gard\u00e9 1201×5 min (20h5) de poses en LRGBH, ceci avec une Lune \u00e0 35-45%.
\nJe ne vous raconte pas tous les p\u00e9pins que j\u2019ai eu, cela serait trop long et barbant.
\nJe me demande juste si le mode bin1 aurait apport\u00e9 du d\u00e9tail (en bin2 ma r\u00e9solution \u00e9tait de 0,8″\/pixel) ?
\nApr\u00e8s ces sessions sur d\u2019autres objets, j\u2019ai remarqu\u00e9 que mon focuser ne faisait pas l\u2019autofocus correctement \u00e0 l\u2019approche du m\u00e9ridien (il n’est pas \u00e0 cr\u00e9maill\u00e8re) et je me demande aussi si cela a jou\u00e9 sur la nettet\u00e9 ici.<\/p>\n

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

Pour la petite histoire je vous partage le premier dessin d\u2019un objet \u00e0 structure spirale (M51) r\u00e9alis\u00e9 par William Parson en 1922 en utilisant son t\u00e9lescope de 1,8 m. Et il lui donna son nom de \u00ab Galaxie du Tourbillon \u00bb (en anglais \u00ab Whirlpool Galaxy \u00bb).<\/p>\n

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

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

Auteur: Alain Pothen (pothen59@gmail.com) Mon second essai sur du ciel profond\u2026 et M51. J\u2019ai utilis\u00e9 ma lunette 150 ED F8, une cam\u00e9ra ASI294MM en bin2 \u00e0 -15 \u00b0C et ai gard\u00e9 1201×5 min (20h5) de poses en LRGBH, ceci avec une Lune \u00e0 35-45%. Je ne vous raconte pas tous les p\u00e9pins que j\u2019ai eu, […]<\/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-10314","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10314","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=10314"}],"version-history":[{"count":2,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10314\/revisions"}],"predecessor-version":[{"id":15686,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10314\/revisions\/15686"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}