司怪三

司怪三猎户座χ2)是一颗位于猎户座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。

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
距离大约5000 ly
(大约2000 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
SIMBADdata

相关条目

参考文献

  1. * 62 Ori -- Emission-line Star, database entry, SIMBAD. Accessed on line January 14, 2011.
  2. 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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