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觜宿二

觜宿二(猎户座φ1
觜宿二在猎户座的位置
观测资料
历元 J2000.0
星座 猎户座[1][2]
星官 觜宿
赤经 5h 34m 49.2380370s[1][2]
赤纬 +9° 29′ 22.487814″[1][2]
视星等(V) 4.41[1][2]
特性
光谱分类B0III[1][2]
U−B 色指数-0.97[1][2]
B−V 色指数-0.16[1][2]
R−I 色指数-0.17[1][2]
天体测定
径向速度 (Rv)33.2 km/s
自行 (μ) 赤经:0.27 mas/yr
赤纬:-2.26 mas/yr
视差 (π)3.00 ± 0.25 mas
距离1,090 ± 90 ly
(330 ± 30 pc)
轨道
绕行周期 (P)3,068.03 d
偏心率 (e)0.22
近心点 历元 (T)2418051.8 JD
近心点幅角 (ω)
(secondary)
105°
半振幅 (K1)
(primary)
13.3 km/s
详细资料
质量15.5±1.1 M
半径6.3±1.0 R
表面重力 (log g)4.05±0.10
亮度28,840 L
温度30,000±300 K
自转速度 (v sin i)20 km/s
年龄7.2±0.8 Myr
其他命名
BD+09 877、SAO 112914、HD 36822、HR 1876
参考数据库
SIMBAD资料

宿xiù,又名猎户座φ1,是猎户座的一颗恒星[1][2],视星等为4.41,位于银经195.4,银纬-12.29,其B1900.0坐标为赤经5h 29m 19.8s,赤纬+9° -12.29′ 19″。

参考文献

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. (原始内容存档于2016-03-16). 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05). 
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觜宿二
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