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败臼一

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败臼一
Diagram showing star positions and boundaries of the Grus constellation and its surroundings
败臼一的位置 (红圈处)
观测资料
历元 J2000
星座 天鹤座
星官
赤经 21h 53m 55.72620s
赤纬 –37° 21′ 53.4790″
视星等(V) 3.0
特性
光谱分类B8 III
U−B 色指数–0.307
B−V 色指数–0.121
天体测定
径向速度 (Rv)–2.1 km/s
自行 (μ) 赤经:+98.07 mas/yr
赤纬:–13.22 mas/yr
视差 (π)15.45 ± 0.67 mas
距离211 ± 9 ly
(65 ± 3 pc)
详细资料
半径4.6 R
温度12,520 K
自转速度 (v sin i)57 km/s
其他命名
γ Gru, CPD−37° 9119, FK5 822, GC 30640, HD 207971, HIP 108085, HR 8353, SAO 213374.
参考数据库
SIMBAD资料

败臼一γ Gru/天鹤座γ)是南天星座天鹤座的一颗恒星视星等3.0,是天鹤座的第三亮星。

基于视差测量,该星距离地球大约211光年恒星分类B8III,亮度分类III代表它是一个已经耗尽核心的氢并演化离主序带巨星。败臼一的光度大约是太阳的470倍,很多的能量都以紫外线辐射出。表面温度12,520K,散发出蓝白色的光芒。败臼一的自转相对快速,恒星自转速度为57km/s。相比之下,太阳赤道的自转速度只有2km/s。

分析依巴谷卫星收集到的数据,该星可能有相同自行的伴星,对败臼一造成引力干扰。

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败臼一
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