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庫樓二

庫樓二
觀測資料
曆元 J2000
星座 半人马座
星官 角宿 库楼
赤經 14h35m30.4s
赤緯 −42°09′28″
視星等(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
徑向速度 (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
詳細資料
質量8.5-10.5 M
半徑5-6 R
亮度6,000 L
溫度20,000 K
金屬量?
自轉333 km/s.
年齡< 2 × 107
其他命名
HR 5440, CD−41°8917, CP−41°6839, HD 127972, SAO 225044, FK5 537, HIP 71352, GC 19656
參考資料庫
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

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庫樓二
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