{"id":10775,"date":"2024-12-01T18:22:02","date_gmt":"2024-12-01T17:22:02","guid":{"rendered":"http:\/\/outters.fr\/?p=10775"},"modified":"2025-07-15T17:03:58","modified_gmt":"2025-07-15T16:03:58","slug":"ngc654-ngc663-ic166-en-rgb","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=10775","title":{"rendered":"NGC654-ngc663-ic166 en rgb"},"content":{"rendered":"

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NGC654-ngc663-ic166 en rgb
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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Lien image RGB<\/h2><\/a><\/div><\/div><\/div>
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Image RGB annotate<\/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 :ic166, ngc654, ngc663
\nDate : images du 30 nov 1 decembre 2024
\nOptics :SV400 Newton F3,8
\nMount : Paramount ME Num\u00e9ro 1
\nLocation : Orange observatory
\nSeeing : FWHM de arc sec(Maxselector) : 2.23 \u00e0 3.89
\nCcd : Moravian G4 16803
\nfilter wheel :Moravian
\nfilters : Astrodon LRVB
\nFocuser :FLI Atlas
\nGuiding : SkyMeca DO et Atik 314L+
\nTemp. out : 0 \u00b0\u00e0 4.6\u00b0
\nTemp ccd : -15\u00b0
\nTotal exposure : 7.25 h
\nR 39 x 5 mn bining 1\u00d71
\nV 24 x 5 mn bining 1\u00d71
\nB 24 x 5 mn bining 1\u00d71<\/p>\n<\/div><\/div><\/div>

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Donn\u00e9es scientifiques<\/h2><\/div>
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Source Wikipedia<\/p>\n

NGC 654<\/b>\u00a0est un\u00a0amas ouvert<\/a>\u00a0situ\u00e9 dans la\u00a0constellation de Cassiop\u00e9e<\/a>. Il a \u00e9t\u00e9 d\u00e9couvert par l’astronome\u00a0allemande<\/a>\u00a0Caroline Herschel<\/a>\u00a0en\u00a01783<\/a>. Selon la\u00a0classification des amas ouverts<\/a>, NGC 654 renferme entre une cinquantaine et une centaine d’\u00e9toiles (la lettre m) dont les magnitudes sont tr\u00e8s diff\u00e9rentes (le chiffre 3). La concentration d’\u00e9toile est moyennement \u00e9lev\u00e9e (II)<\/p>\n

NGC 663<\/b>\u00a0ou\u00a0Caldwell<\/a>\u00a010<\/b>\u00a0est un\u00a0amas ouvert<\/a>\u00a0situ\u00e9 dans la\u00a0constellation de Cassiop\u00e9e<\/a>. Il a \u00e9t\u00e9 d\u00e9couvert par l’astronome\u00a0allemande<\/a>\u00a0Caroline Herschel<\/a>\u00a0en\u00a01783<\/a>.<\/p>\n

Selon la\u00a0classification des amas ouverts<\/a>, NGC 663 renferme entre une cinquantaine et une centaine d’\u00e9toiles (la lettre m) dont les magnitudes sont r\u00e9parties sur un intervalle moyen (le chiffre 2). La concentration d’\u00e9toiles est moyennement faible (III).<\/p>\n

NGC 663 renferme au moins 26 \u00e9toiles de type\u00a0Be<\/a>5<\/a><\/sup>. Le\u00a0type spectral<\/a>\u00a0d’une \u00e9toile Be est \u00abB\u00bb et son spectre contient des raies d’\u00e9mission, d’o\u00f9 la lettre \u00abe\u00bb. Les \u00e9toiles Be de NGC 663 couvre tout le domaine du\u00a0B<\/a>, donc de B0 \u00e0 B9, et 70\u00a0% de ces \u00e9toiles montrent des variations de leur luminosit\u00e95<\/a><\/sup>. L’\u00e2ge de cet amas est compris entre 20 et 25 millions d’ann\u00e9es5<\/a><\/sup>.<\/p>\n<\/div><\/div><\/div>

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