{"id":7060,"date":"2018-04-15T23:00:38","date_gmt":"2018-04-15T22:00:38","guid":{"rendered":"http:\/\/outters.fr\/?p=7060"},"modified":"2025-07-15T17:04:09","modified_gmt":"2025-07-15T16:04:09","slug":"sh2-308-hoo-rgb","status":"publish","type":"post","link":"https:\/\/www.outters.fr\/?p=7060","title":{"rendered":"Sh2-308-HOO-rgb (Ciel Austral)"},"content":{"rendered":"

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Sh2-308 en HOOrgb
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Donn\u00e9es techniques
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Donn\u00e9es scientifiques<\/h2><\/div>
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Sh2-308<\/b>, also designated as Sharpless 308<\/b>, RCW 11<\/b>, or LBN 1052<\/b>,[1]<\/a><\/sup> is an emission nebula<\/a> and HII<\/sub> region<\/a> located near the center of the constellation Canis Major<\/a>, composed of ionised hydrogen<\/a>.[2]<\/a><\/sup> It is about 8 degrees south of Sirius<\/a>, the brightest star in the night sky. The nebula is bubble-like, surrounding a Wolf-Rayet<\/a> star named EZ Canis Majoris<\/a>. This star is in the brief, pre-supernova<\/a> phase of its stellar evolution<\/a>. The nebula is about 4,530 light-years<\/a> (1,389\u00a0pc<\/a>) away from Earth<\/a>,[3]<\/a><\/sup> but some sources indicate that both the star and the nebula are up to 5,870 light-years (1,800\u00a0pc) away.[4]<\/a><\/sup>[5]<\/a><\/sup> Yet others indicate the nebula is as close as 1,875 light-years (575\u00a0pc) from Earth.[6]<\/a><\/sup><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Sh2-308<\/caption>\n
Emission nebula<\/a><\/th>\n<\/tr>\n
\"Sh2-308.jpg\"<\/a><\/p>\n
Observation data: J2000.0 epoch<\/a><\/th>\n<\/tr>\n
Class<\/th>\n3 2 2<\/td>\n<\/tr>\n
Right ascension<\/a><\/th>\n06h<\/sup> 54m<\/sup> 13s<\/sup><\/td>\n<\/tr>\n
Declination<\/a><\/th>\n-22\u00b0 55\u2032 42\u2033<\/td>\n<\/tr>\n
Distance<\/th>\n4530\u00a0ly<\/a><\/td>\n<\/tr>\n
Apparent magnitude<\/a> (V)<\/small><\/th>\n7.0<\/td>\n<\/tr>\n
Apparent dimensions (V)<\/small><\/th>\n35\u2032\u00d735\u2032<\/td>\n<\/tr>\n
Constellation<\/a><\/th>\nCanis Major<\/a><\/td>\n<\/tr>\n
Physical characteristics<\/th>\n<\/tr>\n
Radius<\/a><\/th>\n30\u00a0ly<\/td>\n<\/tr>\n
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Designations<\/th>\nSh-308, RCW<\/a> 11, LBN<\/a> 1052<\/td>\n<\/tr>\n
See also: Lists of nebulae<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div><\/div>
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Commentaires sur l'objet<\/h2><\/div>
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Le traitement de cette image a port\u00e9 essentiellement sur le but de diff\u00e9rencier les zones Halpha et OIII, cette impression 3D de la bulle est le r\u00e9sultat.<\/p>\n

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Image SHO<\/h2><\/a><\/div><\/div><\/div>
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