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库楼二

库楼二
观测资料
历元 J2000
星座 半人马座
星官 角宿 库楼
赤经 14h35m30.4s
赤纬 −42°09′28″
视星等(V) +2.33
特性
光谱分类B2 Ⅴe
U−B 色指数−0.83
B−V 色指数−0.19
变星类型仙后座γ变星
天体测定
径向速度 (Rv)0 km/s
自行 (μ) 赤经:−35.31 mas/yr
赤纬:−32.44 mas/yr
视差 (π)10.57 ± 0.83 mas
距离310 ± 20 ly
(95 ± 7 pc)
绝对星等 (MV)−2.54
详细资料
质量8.5-10.5 M
半径5-6 R
亮度6,000 L
温度20,000 K
金属量?
自转333 km/s.
年龄< 2 × 107
其他命名
HR 5440, CD−41°8917, CP−41°6839, HD 127972, SAO 225044, FK5 537, HIP 71352, GC 19656
参考数据库
SIMBAD资料

库楼二η Cen /半人马座η )是半人马座的一颗恒星。它转速极快,自转周期小于一天。

库楼二是一颗Be型星,即它的氢谱线的辐射是变化的,所以库楼二的亮度也稍微变化,被归类为仙后座γ变星。库楼二距离地球大约309光年。库楼二的质量很大,处于进化为白矮星超新星的界线上。

参考资料

外部链接

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库楼二
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