{"id":11247,"date":"2025-04-06T11:20:32","date_gmt":"2025-04-06T10:20:32","guid":{"rendered":"https:\/\/www.outters.fr\/?p=11247"},"modified":"2026-07-01T11:27:54","modified_gmt":"2026-07-01T10:27:54","slug":"leo-ii-et-ngc3551-en-lrgb","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=11247","title":{"rendered":"Leo II et NGC3551 en Lrgb"},"content":{"rendered":"

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Leo II et NGC3551 en Lrgb
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Commentaires sur l’objet photographi\u00e9<\/span><\/p><\/h1><\/span>

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Lien 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 :ngc3551 et galaxie Leo II
\nDate : 3 mars au 4 avril 2025
\nOptics :SV400 Newton F3,8
\nMount : Paramount ME Num\u00e9ro 1
\nLocation : Orange observatory
\nSeeing : FWHM de 2.36 \u00e0 3.78 arc sec(Maxselector)
\nCcd : Moravian G4 16803
\nfilter wheel :Moravian
\nfilters : Astrodon LRVB
\nFocuser :FLI Atlas
\nGuiding : SkyMeca DO et Atik 314L+
\nTemp. out :
\nTemp ccd :
\nTotal exposure : 11.6\u00a0 h
\nLuminance 43 x 10 mn
\nR 18 x 5 mn bining 1\u00d71
\nV 18 x 5 mn bining 1\u00d71
\nB 18 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

La\u00a0galaxie du\u00a0Lion\u00a0II<\/span><\/abbr><\/span><\/b>\u00a0(Leo\u00a0II<\/span><\/abbr><\/span><\/i>) est une\u00a0galaxie naine sph\u00e9ro\u00efdale<\/a>\u00a0qui fait partie de notre\u00a0Groupe local<\/a>, d\u00e9couverte par\u00a0R. G. Harrington<\/span><\/a>\u00a0et\u00a0A. G. Wilson<\/span><\/a>\u00a0en\u00a01950<\/a>\u00a0en m\u00eame temps que\u00a0Leo\u00a0I<\/span><\/abbr><\/span><\/a>.<\/p>\n

Distante de\u00a0700\u00a0000\u00a0<\/span>ann\u00e9es-lumi\u00e8re<\/a><\/abbr>\u00a0du\u00a0syst\u00e8me solaire<\/a>,\u00a0Leo\u00a0II<\/span><\/abbr><\/span>\u00a0est une\u00a0galaxie satellite<\/a>\u00a0de la\u00a0Voie lact\u00e9e<\/a>.<\/p>\n

Sa p\u00e9riph\u00e9rie est constitu\u00e9e d’\u00e9toiles vieilles de\u00a08\u00a0milliards<\/span>\u00a0de nos ann\u00e9es (terrestres) et la formation stellaire y a cess\u00e9 depuis\u00a04\u00a0milliards<\/span>\u00a0d\u2019ann\u00e9es, sauf en son centre o\u00f9 se trouvent des \u00e9toiles plus jeunes.<\/p>\n<\/div><\/div><\/div>

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