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NGC 247

NGC 247
欧洲南方天文台位于智利的拉西拉天文台MPG/ESO望远镜广角成像器拍摄的NGC 247。
观测资料(J2000 历元
星座鲸鱼座
赤经00h 47m 08.5s[1]
赤纬-20° 45′ 37″[1]
距离11.1 ± 1.2 Mly
视星等 (V)9.9[1]
特征
类型SAB(s)d[1]
角直径 (V)21′.4 × 6′.9[1]
其他名称
HIPASS英语HIPASS J0047-20, LEDA英语Lyon-Meudon Extragalactic Database 2758, ESO-LV 540-0220, IRAS F00446-2101, 2MASX J00470855-2045374, ESO 540-22, IRAS 00446-2101, MCG英语Morphological Catalogue of Galaxies-04-03-005, GLXY G113.8-83.5+144, KUG 0044-210, UGCA 11, PGC 2758,[1] Caldwell 62
参见:星系星系列表

NGC 247鲸鱼座的一个中间螺旋星系(虽然有时候被分类为矮螺旋星系)。距离地球约1110万光年,在天球上位于鲸鱼座。该星系与地球的距离于2011年确定,先前该星系被认为距离地球1220万光年,在最近的观测中被判定为错误值[2]。NGC 247是玉夫座星系群的成员星系。

NGC 247的一侧盘面有一个不寻常大范围的空洞;该空洞内有较年老的色泽偏红恒星,但无色泽偏蓝的年轻恒星[3]

临近NGC 247的星系与玉夫座星系群

[编辑]

NGC 247是其中一个和玉夫座星系(NGC 253)有重力交互作用的星系。NGC 247与NGC 253等星系共同组成了玉夫座星系群的小范围核心区域[4]。而玉夫座星系群的大部分成员星系和星系群核心间的重力相当微弱[4][5]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 NASA/IPAC Extragalactic Database. Results for NGC 247. [2006-12-19]. (原始内容存档于2011-05-14). 
  2. ^ The news regarding the distance error. [2015-03-23]. (原始内容存档于2015-09-24). 
  3. ^ Wagner-Kaiser, R.; Demaio, T.; Sarajedini, A.; Chakrabarti, S. The Void in the Sculptor Group Spiral Galaxy NGC 247. 2014. arXiv:1407.0584可免费查阅 [astro-ph.GA]. 
  4. ^ 4.0 4.1 Karachentsev, I. D. The Local Group and Other Neighboring Galaxy Groups. Astronomical Journal. 2005, 129 (1): 178–188. Bibcode:2005AJ....129..178K. arXiv:astro-ph/0410065可免费查阅. doi:10.1086/426368. 
  5. ^ Karachentsev, I. D.; Grebel, E. K.; Sharina, M. E.; Dolphin, A. E.; Geisler, D.; Guhathakrta, P.; Hodge, P. W.; Karachentseva, V. E.; Sarajedini, A.; Seitzer, P. Distances to nearby galaxies in Sculptor. Astronomy and Astrophysics. 2003, 404 (1): 93–111. Bibcode:2003A&A...404...93K. arXiv:astro-ph/0302045可免费查阅. doi:10.1051/0004-6361:20030170. 


维基共享资源上的相关多媒体资源:NGC 247

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NGC 247
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