{"id":9962,"date":"2018-02-15T12:46:28","date_gmt":"2018-02-15T12:46:28","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/la-galaxie-ngc3495-et-letoile-58-leo\/"},"modified":"2025-06-08T22:45:28","modified_gmt":"2025-06-08T20:45:28","slug":"la-galaxie-ngc3495-et-letoile-58-leo","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/la-galaxie-ngc3495-et-letoile-58-leo\/","title":{"rendered":"La galaxie NGC3495 et l’\u00e9toile 58 Leo"},"content":{"rendered":"

Bonjour,
\nLors du r\u00e9glage du t\u00e9lescope la nuit de ce lundi 12 f\u00e9vrier, je suis tomb\u00e9 par hasard sur ce champ et j’ai trouv\u00e9 tr\u00e8s esth\u00e9tique la proximit\u00e9 de la galaxie avec l’\u00e9toile brillante. Bien sur, la proximit\u00e9 des deux n’est qu’apparente puisque la galaxie spirale NGC3495 se trouve \u00e0 quelques 66.6 Mio al contre seulement 110.45 parsec (360 al) pour l’\u00e9toile 58 Leo qui fait partie de notre galaxie. C\u00f4t\u00e9 brillance, la galaxie est de magnitude 12 et l’\u00e9toile de magnitude 4.8. Comme ma camera SBIG ST10 XME n’est pas prot\u00e9g\u00e9e contre l’\u00e9blouissement du capteur (le blooming), les \u00e9toiles brillantes laissent vite des train\u00e9es tr\u00e8s d\u00e9sagr\u00e9ables provoqu\u00e9es par la saturation des photosites, mais il existe heureusement des logiciels permettant de supprimer ce d\u00e9faut au traitement.
\nL’image jointe est le r\u00e9sultat du compositage de 19 poses brutes de 3 minutes avec filtre clair (binning 1×1) avec la ccd au foyer r\u00e9duit du C11. Je mets une brute de 3 minutes pour montrer l’effet du blooming.<\/p>\n

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

et une brute:<\/p>\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, Lors du r\u00e9glage du t\u00e9lescope la nuit de ce lundi 12 f\u00e9vrier, je suis tomb\u00e9 par hasard sur ce champ et j’ai trouv\u00e9 tr\u00e8s esth\u00e9tique la proximit\u00e9 de la galaxie avec l’\u00e9toile brillante. Bien sur, la proximit\u00e9 des deux n’est qu’apparente puisque la galaxie spirale NGC3495 se trouve \u00e0 quelques 66.6 Mio al contre […]<\/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-9962","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9962","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=9962"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9962\/revisions"}],"predecessor-version":[{"id":11722,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9962\/revisions\/11722"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9962"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9962"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9962"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}