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NGC 40

NGC 40
观测数据
历元 J2000
赤经00h 13m 01.015s[1]
赤纬+72° 31′ 19.085″[1]
距离地球~3,500光年 (~1,000秒差距)[2]
视星等 (V)11.4,[1] 12.3[2]
视直径 (V)38 x 35弧秒[2]
所属星座仙王座
物理属性
其他名称Bow-Tie Nebula, 科德韦尔 2
参看:行星状星云星云列表

NGC 40,也称为蝴蝶结星云科德韦尔2,是威廉·赫歇尔在1788年11月25日发现的一个行星状星云。这颗垂死的恒星已经抛出了它的外壳,并且留下较小、且有炙热气体围绕着的,表面温度高达50,000K[3];来自恒星的辐射导致外层倍加热至10,000K[3],并且膨胀至约1光年的直径[3]。 科学家估计,在30,000年后[3],NGC 40将逐渐暗淡,而只留下一颗如同地球大小的白矮星[3]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 SIMBAD Astronomical Database. Results for NGC 40. [2006-12-22]. (原始内容存档于2019-05-01). 
  2. ^ 2.0 2.1 2.2 O'Meara, Stephen James. Deep Sky Companions: The Caldwell Objects. Sky Publishing Corporation. 2002: 22–23. ISBN 0-933346-97-2. 
  3. ^ 3.0 3.1 3.2 3.3 3.4 Chandra X-Ray Observatory. [2007-06-05]. (原始内容存档于2013-10-22). 

外部链接

[编辑]


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NGC 40
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