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仙女座VII

仙后座矮星系
观测资料(J2000 历元
星座仙后座
赤经23h 26m 31.0s[1]
赤纬+50° 41′ 31″[1]
红移-307 ± 2 km/s[1]
距离258 ± 13 万光年(790 ± 40 千秒差距[2][3]
视星等 (V)12.9[1]
特征
类型Sph?[1]
角直径 (V)2′.5 × 2′.0[1]
其他M31卫星星系
其他名称
仙女座 Ⅶ[1], And VII,[4] Cas dSph,[4]
仙后座矮星系[4]
参见:星系星系列表

仙后座矮星系(也称为仙女座 Ⅶ)位于仙后座,是一个距离258万光年矮椭球星系。仙后座矮星系是本星系群的成员,也是M31卫星星系

仙后座矮星系是在1998年与飞马座矮椭球星系同时被前苏联乌克兰的一组天文学家发现的。仙后座矮星系与飞马座矮椭球星系是已知的卫星星系中距离仙女座大星系最远的,但仍然在其重力能掌握的区域内。这两个星系内都没有显示出年轻的、大质量恒星形成的迹象;取代的是,似乎都以老年的,年龄达到100亿岁的恒星为主。

相关条目

外部链接

参考资料

  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 NASA/IPAC Extragalactic Database. Results for Cassiopeia Dwarf. [2006-11-30]. (原始内容存档于2011-05-14). 
  2. ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov. A Catalog of Neighboring Galaxies. Astronomical Journal. 2004, 127: 2031–2068 [2007-08-18]. (原始内容存档于2007-10-12). 
  3. ^ Karachentsev, I. D.; Kashibadze, O. G. Masses of the local group and of the M81 group estimated from distortions in the local velocity field. Astrophysics. 2006, 49 (1): 3–18. 
  4. ^ 4.0 4.1 4.2 SIMBAD Astronomical Database. Results for Andromeda V. [2006-11-30]. (原始内容存档于2019-05-01). 
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仙女座VII
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