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司怪四

猎户座χ1
Chi1 Orionis A
观测资料
历元 J2000
星座 猎户座
星官 觜宿司怪
赤经 05h 54m 23.0s
赤纬 +20° 16′ 34″
视星等(V) 4.39
特性
光谱分类O10V/A1V
U−B 色指数0.07
B−V 色指数0.59
R−I 色指数0.31
变星类型None
天体测定
径向速度 (Rv)-13.4 km/s
自行 (μ) 赤经:-163.17 mas/yr
赤纬:-98.92 mas/yr
视差 (π)113.58 ± 0.69 mas
距离28.7 ± 0.2 ly
(8.80 ± 0.05 pc)
绝对星等 (MV)4.67
轨道[1]
绕行周期 (P)5156.291±2.508 d
半长轴 (a)89.662±0.880 Mas
偏心率 (e)0.452±0.002
倾斜角 (i)95.937±0.790°
升交点黄经 (Ω)126.360±0.593°
近心点 历元 (T)2451468.2±3.083 JD
近心点幅角 (ω)
(secondary)
111.527±0.230°
半振幅 (K1)
(primary)
1.876±0.003 km/s
详细资料
质量1 M
半径1.45 R
亮度1.08 L
温度5,940 K
金属量89-178%
自转24.5 days (6 km/s.)
年龄108
其他命名
54 Ori, Gl 222 A, HR 2047, BD +20°1162, HD 39587, LTT 11743, GCTP 1354.00, SAO 77705, HIP 27913.

猎户座χ1(χ1 Ori、χ1 Orionis或司怪四)是一颗距离地球约32光年恒星,一对双星,位于猎户座中。

猎户座χA1是一颗光谱型为O10V,并正度过主序星阶段的蓝超巨星。其伴星猎户座χB的质量是太阳的x2,公转周期14.1年,估计星体分类为A1V。 猎户座χ1被认为是大熊座移动星群的外围恒星之一。

相关条目

参考资料

  1. ^ Han, Inwoo; Gatewood, George. A Precise Orbit Determination of χ1Orionis from Astrometric and Radial Velocity Data. Publications of the Astronomical Society of the Pacific. 2002, 114 (792): 224–228. Bibcode:2002PASP..114..224H. S2CID 122100081. doi:10.1086/338367. 

外部链接

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司怪四
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