{"id":8851,"date":"2020-08-22T02:46:58","date_gmt":"2020-08-22T01:46:58","guid":{"rendered":"http:\/\/outters.fr\/?p=8851"},"modified":"2025-07-15T17:04:05","modified_gmt":"2025-07-15T16:04:05","slug":"ngc7023-lrvb","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=8851","title":{"rendered":"NGC7023 Lrvb"},"content":{"rendered":"

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NGC7023 Lrvb
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Image Lrgb<\/h2><\/a><\/div><\/div><\/div>
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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\"outters-nicolas\"<\/p>\n

La n\u00e9buleuse de l’Iris est un classique mais qui est plut\u00f4t photographi\u00e9 en grand champs. L\u00e0 on est \u00e0 0,65 arc seconde d’\u00e9chantillonnage et les d\u00e9tails commencent \u00e0 se distinguer.<\/p>\n<\/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 : NGC7023
\nCommon name : Iris nebulae
\nDate images Du 24 juillet au 22 aout 2020
\nOptics : Rcos 12.5″
\nMount : Paramount ME Num\u00e9ro 3
\nLocation : Sirene observatory
\nSeeing : fwhm : 1.67 \u00e0 2.6
\nCcd : Apogee 16U
\nfilter wheel : Apogee
\nfilters : Astrodon
\nL rvb
\nFocuser :TIM
\nGuiding : Atik 314L+
\nTemp. out : T\u00b0 14.8 \u00e0 +18\u00b0
\nTemp ccd : -25\u00b0
\nRA 21:01:38.77025
\nDEC +68:09:58.4330
\nTotal exposure : 26 h
\ntout en binning 1×1
\nRouge 15 x 15′ \/ vert 20 x 15′ \/ bleu 20 x 15′
\nL : 50 x 15′<\/div><\/div><\/div>
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Donn\u00e9es scientifiques<\/h2><\/div>
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Source wikipedia<\/p>\n

NGC 7023<\/b>, aussi nomm\u00e9e Caldwell 4<\/b> et la n\u00e9buleuse de l’Iris<\/b> est une n\u00e9buleuse par r\u00e9flexion<\/a> dans la constellation<\/a> de C\u00e9ph\u00e9e<\/a>. Elle est situ\u00e9e \u00e0 1300 ann\u00e9es-lumi\u00e8re<\/a> de la Terre.<\/p>\n

Historique<\/span><\/h2>\n

La n\u00e9buleuse est d\u00e9couverte le William Herschel<\/a>. Aujourd’hui on d\u00e9signe NGC 7023<\/i> comme un Amas stellaire<\/a> avec la n\u00e9buleuse LBN 487<\/i>.<\/p>\n

NGC 7023<\/i> est de magnitude 7,0. T Cephei<\/a> est une variable de type Mira<\/a> situ\u00e9e pr\u00e8s de la n\u00e9buleuse.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Donn\u00e9es d\u2019observation
\n(\u00c9poque<\/a> J2000<\/a>)<\/small><\/th>\n<\/tr>\n
Constellation<\/a><\/th>\nC\u00e9ph\u00e9e<\/a><\/td>\n<\/tr>\n
Ascension droite<\/a> (\u03b1)<\/th>\n21h<\/sup>\u00a001m<\/sup>\u00a035s<\/sup><\/td>\n<\/tr>\n
D\u00e9clinaison<\/a> (\u03b4)<\/th>\n+68\u00b0\u00a010\u2032\u00a010,0\u2033<\/td>\n<\/tr>\n
Magnitude apparente<\/a> (V)<\/small><\/th>\n6.8<\/td>\n<\/tr>\n
Dimensions apparentes (V)<\/small><\/th>\n18′ \u00d7 18‘<\/a><\/td>\n<\/tr>\n
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Astrom\u00e9trie<\/th>\n<\/tr>\n
Distance<\/th>\n1\u00a0300\u00a0al<\/a><\/abbr><\/td>\n<\/tr>\n
Caract\u00e9ristiques physiques<\/th>\n<\/tr>\n
Type d’objet<\/th>\nN\u00e9buleuse par r\u00e9flexion<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div><\/div>
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