大熊座χ,又名BD+48 1966HD 102224SAO 43886HR 4518,是大熊座的一颗恒星[9][10],视星等为3.71,位于银经150.32,银纬65.72,其B1900.0坐标为赤经11h 40m 46.3s,赤纬+48° 65.72′ 2″。

大熊座χ
太阳守的位置(画圈处)
观测资料
历元 J2000.0
星座 大熊座
星官 太阳守
赤经 11h 46m 3.01407s[1]
赤纬 +47° 46′ 45.8626″[1]
视星等(V) 3.72[2]
特性
演化阶段Horizontal branch[3]
光谱分类K0.5 IIIb[4]
U−B 色指数+1.16[2]
B−V 色指数+1.18[2]
天体测定
径向速度 (Rv)−9.02±0.20[2] km/s
自行 (μ) 赤经:−138.29[1] mas/yr
赤纬:28.57[1] mas/yr
视差 (π)17.76 ± 0.16[1] mas
距离184 ± 2 ly
(56.3 ± 0.5 pc)
绝对星等 (MV)0.10±0.02[5]
详细资料 [2]
质量1.49[6] M
半径20.8±0.8[7] R
表面重力 (log g)2.2
亮度158 L
温度4,416±9 K
金属量 [Fe/H]−0.44 dex
自转速度 (v sin i)2.3 km/s
其他命名
Alkaphrah[8]、​El Koprah[8]、​Taiyangshou、​Chi UMa, χ UMa、​63 Ursae Majoris、​BD+48°1966、​FK5 441、​HD 102224、​HIP 57399、​HR 4518、​SAO 43886[9]
参考数据库
SIMBAD资料
太阳守的照片

参考文献

  1. ^ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752 , doi:10.1051/0004-6361:20078357. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 Jennens, P. A.; Helfer, H. L., A new photometric metal abundance and luminosity calibration for field G and K giants, Monthly Notices of the Royal Astronomical Society, September 1975, 172 (3): 667–679, Bibcode:1975MNRAS.172..667J, doi:10.1093/mnras/172.3.667 . 
  3. ^ Alves, David R., K-Band Calibration of the Red Clump Luminosity, The Astrophysical Journal, August 2000, 539 (2): 732–741, Bibcode:2000ApJ...539..732A, S2CID 16673121, arXiv:astro-ph/0003329 , doi:10.1086/309278. 
  4. ^ Keenan, Philip C.; McNeil, Raymond C., The Perkins catalog of revised MK types for the cooler stars, Astrophysical Journal Supplement Series, 1989, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373. 
  5. ^ Park, Sunkyung; et al, Wilson-Bappu Effect: Extended to Surface Gravity, The Astronomical Journal, 2013, 146 (4): 73, Bibcode:2013AJ....146...73P, S2CID 119187733, arXiv:1307.0592 , doi:10.1088/0004-6256/146/4/73. 
  6. ^ Luck, R. Earle, Abundances in the Local Region. I. G and K Giants, Astronomical Journal, 2015, 150 (3), 88, Bibcode:2015AJ....150...88L, S2CID 118505114, arXiv:1507.01466 , doi:10.1088/0004-6256/150/3/88. 
  7. ^ Nordgren, Tyler E.; et al, Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer, The Astronomical Journal, December 1999, 118 (6): 3032–3038 [2022-11-14], Bibcode:1999AJ....118.3032N, doi:10.1086/301114 , (原始内容存档于2015-09-08). 
  8. ^ 8.0 8.1 Bakich, Michael E., The Cambridge Guide to the Constellations, Cambridge University Press: 112, 116, 1995, ISBN 0521449219 
  9. ^ 9.0 9.1 chi UMa. SIMBAD. 斯特拉斯堡天文资料中心. [2017-02-22]. 
  10. ^ VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05). 
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