{"id":5029,"date":"2012-10-23T09:51:07","date_gmt":"2012-10-23T08:51:07","guid":{"rendered":"http:\/\/outters.fr\/?p=5029"},"modified":"2025-07-15T17:04:15","modified_gmt":"2025-07-15T16:04:15","slug":"ngc4725","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=5029","title":{"rendered":"ngc4725"},"content":{"rendered":"

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ngc4725<\/strong>
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\"ngc4725\"<\/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\"Un objet sympa \u00e0 faire et pas facile de rendre tous les d\u00e9tails \u00e0 1 m\u00e8tre de focale.
\nLe fond de ciel \u00e9tait pas mal bruit\u00e9 et j’ai eu un mal fou \u00e0 le rendre plus homog\u00e8ne.
\nPour les gradients je n’en parle m\u00eame pas ! avec cette taille de capteur on prend de tout<\/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 : NGC4725
\nCommon name :
\nDate : 17 avril 2010
\nTime : 21 h
\nOptics :TEC140 F7
\nMount : Paramount ME Num\u00e9ro 2
\nLocation : Orange Observatory
\nSeeing : FWHM de 2,8 \u00e0 3 arc sec\/pixel (ccdinspector)
\nCcd : FLI Proline 16803
\nfilter wheel : FLI
\nfilters : Astrodon RGB true color<\/p>\n

Focuser :Robofocus et focusmax
\nTemp. out : 10 \u00b0
\nTemp ccd : -35\u00b0
\nTotal exposure :8 h<\/p>\n

Luminance : 12 x 10 mn bining 1×1
\nrouge 12 x 5 mn bining 2×2
\nvert :12 x 5 mn bining 2×2
\nBleu 12 x 5 mn bining 2×2<\/div><\/div><\/div>

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Donn\u00e9es scientifiques<\/h2><\/div>
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NGC 4725<\/b> est une galaxie spirale interm\u00e9diaire<\/a> barr\u00e9e<\/a> situ\u00e9e \u00e0 environ 41 millions d’ann\u00e9es-lumi\u00e8re<\/a><\/span> de la Terre<\/a> dans la constellation de la Chevelure de B\u00e9r\u00e9nice<\/a>4<\/a><\/sup>. NGC 4725 est \u00e9galement une galaxie de Seyfert<\/a>.<\/p>\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>\nChevelure de B\u00e9r\u00e9nice<\/a>1<\/a><\/sup><\/td>\n<\/tr>\n
Ascension droite<\/a> (\u03b1)<\/th>\n12h<\/sup>\u00a050m<\/sup>\u00a026,6s<\/sup>2<\/a><\/sup><\/td>\n<\/tr>\n
D\u00e9clinaison<\/a> (\u03b4)<\/th>\n+25\u00b0\u00a030\u2032\u00a003\u2033 2<\/a><\/sup><\/td>\n<\/tr>\n
Distance<\/th>\n40\u00b16<\/small>\u00a0millions\u00a0d’a.l.<\/a><\/span> (\u223c12,3\u00a0Mpc<\/a>)<\/span>3<\/a><\/sup><\/td>\n<\/tr>\n
Magnitude apparente<\/a> (V)<\/small><\/th>\n10,12<\/a><\/sup><\/td>\n<\/tr>\n
Taille angulaire<\/a> (minute d’angle<\/a>)<\/th>\n10\u00a07′ \u00d7 7\u00a06′2<\/a><\/sup><\/td>\n<\/tr>\n
Caract\u00e9ristiques physiques<\/th>\n<\/tr>\n
Type d’objet<\/th>\nGalaxie spirale interm\u00e9diaire<\/a>
\nGalaxie spirale barr\u00e9e<\/a>
\nGalaxie de Seyfert<\/a>2<\/a><\/sup><\/td>\n<\/tr>\n
D\u00e9couverte<\/th>\n<\/tr>\n
D\u00e9signation(s)<\/th>\nUGC<\/a> 79892<\/a><\/sup>, PGC<\/a> 434512<\/a><\/sup><\/td>\n<\/tr>\n
Liste des objets c\u00e9lestes<\/a><\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n
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