{"id":3679,"date":"2016-07-27T17:41:57","date_gmt":"2016-07-27T16:41:57","guid":{"rendered":"http:\/\/outters.fr\/?p=3679"},"modified":"2025-07-15T17:04:12","modified_gmt":"2025-07-15T16:04:12","slug":"m51","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=3679","title":{"rendered":"m51"},"content":{"rendered":"

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m51<\/strong>
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\"Galaxie<\/a><\/span><\/div><\/div><\/div>
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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\"outters-nicolas\"Oui, je sais c’est classique mais toujours sympa de refaire un classique de temps en temps !
\nLe but \u00e9tant de faire apparaitre les d\u00e9tails et les extensions. Pour les d\u00e9tails \u00e7a \u00e9t\u00e9 rapp\u00e9 avec des nuits tr\u00e8s moyennes voir pas terribles. Pour les extensions c’est assez r\u00e9ussit.<\/p>\n<\/div>

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Image LRGB<\/h2><\/a><\/div><\/div><\/div>
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Donn\u00e9es techniques
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Donn\u00e9es techniques de prise de vue<\/h2><\/div>
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Object :M51
\nCommon name : Wirlpool Galaxy
\nDate : du 23 f\u00e9vrier au 10 mars 2014
\nOptics :Rcos 12″ Mount : Paramount ME Num\u00e9ro 3 Location : Castor Sirene observatory
\nSeeing : FWHM de 2,13 \u00e0 3,5 arc sec(ccdinspector)
\nCcd : Apogee 16803
\nfilter wheel :Apogee
\nfilters : Astrodon LRGB
\nFocuser :TIM Rcos
\nGuiding : MMOAG Astrodon et Atik 314L+
\nTemp. out : -5 \u00b0\u00e0 5\u00b0
\nTemp ccd : -25\u00b0
\nTotal exposure :20 h
\nLuminance 50 x 20mn bining 1×1
\nHalpha : 25 x 20mn bining 1×1
\nRouge 16 x 5 mn bining 2×2
\nVert 10 x 5 mn bining 2×2
\nBleu 16 xx 5 mn bining 2×2<\/div><\/div><\/div>
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Donn\u00e9es scientifiques<\/h2><\/div>
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M<\/a>51<\/b>, aussi connue comme la galaxie du Tourbillon<\/b> (Whirlpool Galaxy<\/i><\/span> en anglais) est un couple de galaxies<\/a>, \u00e0 environ\u00a08,4\u00a0Mpc<\/a><\/span> (\u223c27,4\u00a0millions d’\u00a0a.l.<\/a>)<\/span> de la Terre<\/a>1<\/a><\/sup> dans la constellation Chiens de chasse, compos\u00e9 d’une galaxie spirale r\u00e9guli\u00e8re<\/a> massive dont le diam\u00e8tre est estim\u00e9 \u00e0 100\u00a0000\u00a0ann\u00e9es-lumi\u00e8re<\/span> et d’une petite galaxie irr\u00e9guli\u00e8re<\/a>. Elle a \u00e9t\u00e9 d\u00e9couverte en 1773<\/a> par Charles Messier<\/a>.<\/p>\n

Ses bras spiraux facilement visibles lui ont valu son surnom de \u00ab\u00a0galaxie tourbillon\u00a0\u00bb (Whirlpool Galaxy<\/i> en anglais), qui a donn\u00e9 son nom \u00e0 la fonction de hachage<\/a> Whirlpool<\/a>. Une supernova<\/a> a \u00e9t\u00e9 observ\u00e9e dans la galaxie en 1994<\/a>. Une autre en 2005, et une troisi\u00e8me a fait son apparition le Ciel et Espace<\/a>.<\/p>\n\n\n\n\n\n\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
Constellation<\/a><\/th>\nChiens de chasse<\/a><\/td>\n<\/tr>\n
Ascension droite<\/a> (\u03b1)<\/th>\n13h<\/sup>\u00a029m<\/sup>\u00a052,37s<\/sup><\/td>\n<\/tr>\n
D\u00e9clinaison<\/a> (\u03b4)<\/th>\n+47\u00b0\u00a011\u2032\u00a040,8\u2033<\/td>\n<\/tr>\n
Distance<\/th>\nenviron\u00a08,4\u00a0Mpc<\/a><\/span> (\u223c27,4\u00a0millions d’\u00a0a.l.<\/a>)<\/span><\/td>\n<\/tr>\n
Magnitude apparente<\/a> (V)<\/small><\/th>\n8,4<\/td>\n<\/tr>\n
Dimensions apparentes (V)<\/small><\/th>\n9’x7′ minutes d’arc<\/td>\n<\/tr>\n
Caract\u00e9ristiques physiques<\/th>\n<\/tr>\n
Type d’objet<\/th>\nGalaxie<\/a> Sc<\/td>\n<\/tr>\n
Masse<\/a><\/th>\n160 milliards\u00a0M\u2609<\/sub><\/a><\/td>\n<\/tr>\n
Dimensions<\/th>\n100 000
\n(30 000\u00a0pc<\/a>)<\/td>\n<\/tr>\n
Magnitude absolue<\/a><\/th>\n?<\/td>\n<\/tr>\n
Couleur (B-V)<\/small><\/th>\n?<\/td>\n<\/tr>\n
D\u00e9couverte<\/th>\n<\/tr>\n
D\u00e9couvreur(s)<\/th>\nCharles Messier<\/a><\/td>\n<\/tr>\n
Date<\/th>\n13 octobre 1773<\/a><\/td>\n<\/tr>\n
D\u00e9signation(s)<\/th>\nM51, NGC 5194, Arp 85<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div><\/div>
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