{"id":4028,"date":"2016-08-07T16:21:36","date_gmt":"2016-08-07T15:21:36","guid":{"rendered":"http:\/\/outters.fr\/?p=4028"},"modified":"2025-07-15T17:04:12","modified_gmt":"2025-07-15T16:04:12","slug":"ngc7822","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=4028","title":{"rendered":"ngc7822"},"content":{"rendered":"

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ngc7822<\/strong>
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\"ngc7822\"<\/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\"Voici NGC7822 pr\u00e9sent\u00e9e en narrowband technique SHO soit :
\nSII = rouge
\nHa = Vert
\nOIII = bleu
\nLuminance faite avec la couche Halpha.<\/p>\n

Il aura fallu deux p\u00e9riodes lors de l’automne pour venir \u00e0 bout de cette image !
\nPas de petites \u00e9conomies, 50 h sur ce genre d’objet c’est le minimum pour en obtenir un bon signal\/bruit.
\nPour le cadrage, au d\u00e9part \u00e7a devait rentrer au chausse pied et puis il a eu Murphy qui s’y est mis en d\u00e9cidant que la bague du PO allait se d\u00e9visser tout doucement mais surement. Au final, un joli bout loup\u00e9 lors de l’alignement ! tant pis pour le cadrage je vous montre tout m\u00eame si celui ci reste bof bof….<\/p>\n<\/div>

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Image SHO<\/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 :LDN907
\nDate : image du 3\/4\/5\/21\/22\/23\/24\/25\/ septembre et 2\/3\/4\/5\/9\/10\/11\/12 decembre soit 16 nuits
\nOptics :Tec140 F7
\nMount : Paramount ME Num\u00e9ro 2
\nLocation : Orange observatory
\nSeeing : 2,75 arcsec\/pixel
\nCcd : Proline 16803
\nfilter wheel :FLI
\nfilters : Astrodon
\nHa 5nm \/ SII 5nm \/ OIII 3nm
\nFocuser :Robofocus
\nGuiding : Atik 314L+
\nTemp. out : -10 \u00e0 +10\u00b0
\nTemp ccd : -35\u00b0
\nTotal exposure :50 h
\ntout en binning 1×1
\ns2 : 20 x 30′
\nHa 57 x 30′
\no3 : 23 x 30′<\/div><\/div><\/div>
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Donn\u00e9es scientifiques<\/h2><\/div>
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NGC 7822<\/b> est une n\u00e9buleuse<\/a> situ\u00e9e \u00e0 environ 3\u00a0000 ann\u00e9es-lumi\u00e8re<\/a> de la Terre<\/a>, dans la constellation<\/a> de C\u00e9ph\u00e9e<\/a>1<\/a><\/sup>,<\/sup>2<\/a><\/sup>,<\/sup>3<\/a><\/sup>. D’une \u00e9tendue de quelques dizaines d’ann\u00e9es-lumi\u00e8re1<\/a><\/sup>, la r\u00e9gion comprend les objets astronomiques<\/a> Sharpless 171<\/a> et le jeune amas d’\u00e9toiles Berkeley 59<\/a>\u00a0(pl)<\/span><\/a>.<\/p>\n

La n\u00e9buleuse abrite \u00e9galement l’une des \u00e9toiles les plus chaudes situ\u00e9es \u00e0 proximit\u00e9 du Soleil<\/a>, BD+66 1673<\/a>, un syst\u00e8me binaire<\/a> incluant une O5V d’une temp\u00e9rature de surface d’environ 45\u00a0000\u00a0kelvins<\/a><\/span> et d’une luminosit\u00e9 d’environ 100\u00a0000\u00a0fois<\/span> celles du Soleil<\/sup><\/p>\n

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