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
χ2 Ori, Chi2 Orionis, Chi2 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. ^ 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. ^ 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.
  3. ^ 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.
  4. ^ 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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