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NGC 7662

NGC 7662
哈伯太空望远镜 (HST)的NGC 7662影像。
Credit: HST/NASA/ESA[1]
观测数据
历元 J2000
赤经23h 25m 54s[2]
赤纬+42° 32′ 6″[2]
距离地球~5000 光年
视星等 (V)9
视直径 (V)37″
所属星座仙女座
物理属性
半径 (光年)0.8 ly
其他名称PK 106-17 1, GCRV 14695, PN ARO 20, 科德韦尔22
参看:行星状星云星云列表


NGC 7662,也称为蓝雪球星云科德韦尔22,是位于仙女座的一个行星状星云。这个星云的真实距离并不很精确,依据Skalnate Pleso星表 (1951)是1,800光年,直径20,00天文单位。稍后,C.R.O'Dell (1963)测量的距离是1,740秒差距或大约5,600光年,真实的大小也增加至0.8光年或大约50,000天文单位。在它的中心可以看见一颗暗淡的恒星,光度在12-16等之间[3]。中心的恒星是一颗蓝矮星,有着连续光谱,计算逤得的温度是75,00K。这是所知的行星状星云中,中心恒星温度最高的一颗[4]

NGC 7662是一颗很受业于观测者喜爱的星云,一架小的折射镜就可以解析出恒星和轻微的云气。以6吋镜放大100倍观察,将可以看见蓝色的盘状。使用16吋或更大的口径,可以看内部细微的颜色和亮度变化。

图集

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相关条目

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参考资料

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  1. ^ The Hubble European Space Agency Information Centre Hubble picture of NGC 7662. [2011-01-19]. (原始内容存档于2007-09-27). 
  2. ^ 2.0 2.1 SIMBAD Astronomical Database. Results for NGC 7662. [2007-04-10]. (原始内容存档于2019-05-01). 
  3. ^ Blue Snowball Nebula (NGC 7662). Internet Encyclopedia of Science. [2008-10-11]. (原始内容存档于2015-10-30). 
  4. ^ Planetary nebula NGC 7662 in Andromeda. Kopernic Observatory. [2008-10-11]. (原始内容存档于2016-03-03). 

外部链接

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NGC 7662
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