司怪三
司怪三 猎户座χ2
觀測資料曆元 J2000.0
星座
猎户座
星官
觜宿 ,司怪
赤經
06h 03m 55.1849s [1]
赤緯
+20° 08′ 18.427″[1]
視星等 (V)
4.646[1]
特性 光谱分类 B2Iaev[1] U−B 色指数 −0.68[2] B−V 色指数 +0.28[2] R−I 色指数 +0.22[2] 变星类型 ACYG[3]
天体测定 徑向速度 (Rv ) 16.8 ± 0.9[1] km/s 自行 (μ) 赤经:2.19[1] mas /yr 赤纬:−2.81[1] mas /yr 视差 (π) 0.65 ± 0.89[1] mas 距离 approx. 5,000 ly (approx. 2,000 pc )
詳細資料
半徑 60-65[4] R ☉ 自轉速度 (v sin i ) 36[2] km /s
其他命名
χ
2 Ori, Chi
2 Orionis, Chi
2 Ori, 62 Orionis, 62 Ori,
BD +20 1233, GC 7675,
HD 41117,
HIP 28716,
HR 2135, PPM 95316,
SAO 77911.
[1]
參考資料庫 SIMBAD 资料
司怪三 (猎户座χ2 )是一颗位于猎户座 的B型 超巨星 (一说为特超巨星)[1] 。它的视星等约为4.646[1] 。该星非常沉重而且明亮,距离远至5000光年因此只是一个5等星。实际上该星要比太阳重42倍,总亮度超过太阳的40万倍。该星的大小为0.3天文单位,大约相当于太阳的60-65倍。数百万年后该星即将爆发为一个超新星。
相关条目
参考文献
^ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 * 62 Ori -- Emission-line Star , database entry, SIMBAD . Accessed on line January 14, 2011.
^ 2.0 2.1 2.2 2.3 HR 2135 , database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50 . Accessed on line January 14, 2011.
^ khi 2 Ori, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars , Sternberg Astronomical Institute, Moscow, Russia. Accessed on line January 14, 2011.
^ HD 41117 , database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224 . Accessed on line January 14, 2011.
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