{"id":6658,"date":"2017-10-30T17:27:30","date_gmt":"2017-10-30T16:27:30","guid":{"rendered":"http:\/\/outters.fr\/?p=6658"},"modified":"2025-07-15T17:04:09","modified_gmt":"2025-07-15T16:04:09","slug":"ngc-7635-m52-sho","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=6658","title":{"rendered":"NGC7635-M52-SHO"},"content":{"rendered":"

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NGC 7635-M52-SHO
\n<\/span><\/p><\/h2><\/span>

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\"NGC<\/a><\/span><\/div>
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Donn\u00e9es scientifiques<\/h2><\/div>
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NGC 7635<\/b>, \u00e9galement connue sous le nom de n\u00e9buleuse de la Bulle<\/b>, est une n\u00e9buleuse<\/a> d’environ 10 ann\u00e9es-lumi\u00e8re<\/a><\/abbr><\/span> de diam\u00e8tre situ\u00e9e dans la constellation de Cassiop\u00e9e<\/a>. Elle est compos\u00e9e d’hydrog\u00e8ne ionis\u00e9, c’est une r\u00e9gion HII<\/a>1<\/a><\/sup>.<\/p>\n

Elle a \u00e9t\u00e9 d\u00e9couverte en 1787 par William Herschel<\/a>2<\/a><\/sup>.<\/p>\n

Situ\u00e9e pr\u00e8s de l’amas ouvert<\/a> Messier 52<\/a>, cette n\u00e9buleuse ressemble \u00e0 une bulle. Elle est form\u00e9e par le vent stellaire<\/a> cr\u00e9\u00e9 par l’\u00e9toile SAO 20575 (BD+60 2522) \u00e0 une vitesse de plus de 1\u00a0700<\/span> km\/s<\/abbr><\/span>. Cette \u00e9toile, excentr\u00e9e par rapport au nuage, est la plus brillante. Elle est tr\u00e8s jeune (moins de 4 millions d’ann\u00e9es), tr\u00e8s chaude (environ 35\u00a0000<\/span> degr\u00e9s<\/span>) et massive (de 20 \u00e0 40 fois la masse solaire<\/a>)3<\/a><\/sup>.<\/p>\n

L’\u00e9toile n’est pas au centre car le nuage en expansion rencontre une r\u00e9gion plus dense et plus froide sur un c\u00f4t\u00e9. Elle devrait exploser en supernova<\/a> dans 10 \u00e0 20 millions d’ann\u00e9es2<\/a><\/sup>.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Donn\u00e9es d\u2019observation
\n(\u00c9poque<\/a> J2000.0<\/a>)<\/small><\/th>\n<\/tr>\n
Ascension droite<\/a> (\u03b1)<\/th>\n23h<\/sup>\u00a020m<\/sup><\/td>\n<\/tr>\n
D\u00e9clinaison<\/a> (\u03b4)<\/th>\n61\u00b0\u00a013\u2032<\/td>\n<\/tr>\n
Distance<\/th>\n11\u00a0300 al<\/a><\/abbr><\/span>
\n(3\u00a0464,6 pc<\/a><\/abbr><\/span>)<\/td>\n<\/tr>\n
Magnitude apparente<\/a> (V)<\/small><\/th>\n8.5<\/td>\n<\/tr>\n
Dimensions apparentes (V)<\/small><\/th>\n15′<\/td>\n<\/tr>\n
Caract\u00e9ristiques physiques<\/th>\n<\/tr>\n
Type d’objet<\/th>\nR\u00e9gion HII<\/a><\/td>\n<\/tr>\n
Dimensions<\/th>\n101<\/a><\/sup><\/td>\n<\/tr>\n
D\u00e9couverte<\/th>\n<\/tr>\n
D\u00e9signation(s)<\/th>\nN\u00e9buleuse de la Bulle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div><\/div>
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Donn\u00e9es de prises de vues<\/h2><\/div>
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Object : NGC_7635 – M52
\nCommon name :Bubble nebulae
\nDate : images du 24 ao\u00fbt au 15 octobret 2017
\nOptics : Newton SV400 F3,8
\nMount : Paramount ME Num\u00e9ro 1
\nLocation : Orange observatory
\nSeeing FWHM : 2.11 \u00e0 3.17
\nCcd : Moravian G4
\nfilter wheel : Moravian
\nfilters : Astrodon SHO
\nFocuser :Atlas
\nGuiding : Atik 314L+
\nTemp. out : T\u00b0 de 7\u00b0 \u00e0 +23\u00b0
\nTemp ccd : -25\u00b0
\nTotal exposure :34h45
\ntout en binning 1×1
\nHalpha : 70 x 10mn
\nSII : 41 x 10mn
\nOIII : 59 x 10 mn
\nR :30 x 5 mn
\nG : 24 x 5 mn
\nB :24 x 5 mn<\/div><\/div><\/div>
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Donn\u00e9es techniques
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Commentaires sur l’objet photographi\u00e9
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\"\"<\/span><\/p>\n

J’ai malheureusement oubli\u00e9 de faire des poses tr\u00e8s courtes pour \u00e9viter la partie centrale de la bulle satur\u00e9e, il aurait pu y avoir plus de d\u00e9tails dedans.<\/p>\n

Sinon j’ai choisi de mixer le SHO en fausses couleurs avec la RGB pour regagner un peu de couleurs naturelles sur les \u00e9toiles.<\/p>\n

Voici un\u00a0 lien bien sympathique !<\/p>\n

Image Hubble telescope de la bulle<\/a><\/p>\n

Vivement un miroir de 2m40 !!!<\/p>\n<\/div>

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Les images
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Image SHO<\/h2><\/a><\/div><\/div><\/div>
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Image Ha <\/h2><\/a><\/div><\/div><\/div>
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Image SII<\/h2><\/a><\/div><\/div><\/div>
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Image OIII<\/h2><\/a><\/div><\/div><\/div>
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Image RGB<\/h2><\/a><\/div><\/div><\/div>
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