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娄宿一

娄宿一(白羊座β)
Beta Arietis

娄宿一在白羊座的位置
观测资料
历元 J2000
星座 白羊座
星官 娄宿
赤经 01h 54m 38.4s
赤纬 +20° 48′ 29″
视星等(V) 2.64
特性
光谱分类A5V
U−B 色指数0.1
B−V 色指数0.13
R−I 色指数-0.02
天体测定
径向速度 (Rv)-1.9 km/s
自行 (μ) 赤经:96.32 mas/yr
赤纬:-108.8 mas/yr
视差 (π)54.74 ± 0.75 mas
距离59.6 ± 0.8 ly
(18.3 ± 0.3 pc)
绝对星等 (MV)2.77
详细资料
质量2.00/1.02 M
半径2.1 R
亮度22 L
温度8200 K
自转速度 (v sin i)79 km/s
轨道
伴星白羊座βb
绕行周期 (P)0.29295 yr
半长轴 (a)0.0361 ± 0.0003"
偏心率 (e)0.903 ± 0.012 °
倾斜角 (i)44.7 ± 1.3°
升交点黄经 (Ω)79.1 ± 0.8°
近心点 历元 (T)209.1 ± 1.2 °
其他命名
Sheratan, Sharatan, Al Sharatain, 6 Arietis, Gl 80, HR 553, BD +20°306, HD 11636, SAO 75012, FK5 66, GC 2309, HIP 8903.
参考数据库
SIMBAD资料
ARICNS资料

娄宿一,即白羊座ββ Ari拜耳命名法)或白羊座6佛兰斯蒂德命名法),是一个位于白羊座联星系统,距离地球59.6光年

娄宿一的视星等为+2.66,主星的光谱类型是A5V(白色主序星)。它拥有一颗光谱联星白羊座βb,轨道周期为107天,轨道离心率为0.88。根据观测资料对这个伴星的质量进行估计,提示它可能是一颗G型恒星。

白羊座β在中国星官系统中属于西方白虎七宿娄宿的第一星,因此被称为娄宿一[1][2]。在西方的传统名为Al Sharatan,来自于阿拉伯语الشراطان。

参考资料

  1. ^ 香港太空馆 - 研究资源 - 亮星中英对照表页面存档备份,存于互联网档案馆), Hong Kong Space Museum. Accessed on line November 23, 2010.
  2. ^ 中国星座神话, written by 陈久金. Published by 台湾书房出版有限公司, 2005, ISBN 978-986-7332-25-7.
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娄宿一
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