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HD 47536

HD 47536

觀測資料
曆元 J2000.0
星座 大犬座[1][2]
星官
赤經 6h 37m 47.6s[1][2][3]
赤緯 -32° 20′ 23″[1][2][3]
視星等(V) 5.27[1][2]
特性
光谱分类K2III[1][2]
U−B 色指数1.12[1][2]
B−V 色指数1.18[1][2]
R−I 色指数[1][2]
天体测定
徑向速度 (Rv)+78.8 km/s
自行 (μ) 赤经:108.06 ± 0.20[3] mas/yr
赤纬:64.60 ± 0.24[3] mas/yr
视差 (π)8.11 ± 0.23[3] mas
距离400 ± 10 ly
(123 ± 3 pc)
绝对星等 (MV)−0.17 ± 0.15[4]
詳細資料
質量0.94 ± 0.06[4] M
半徑21.3 ± 1.9[4] R
表面重力 (log g)1.72 ± 0.08[4]
亮度181 L
溫度4,352[4] K
金属量 [Fe/H]−0.68[4] dex
自轉625 days[5]
年齡9.33 ± 1.88[4] Gyr
其他命名
CD-32 3216,SAO 197019,HD 47536,HR 2447,GC 8667,GSC 07091-01257,HIP 31688
參考資料庫
SIMBAD资料
系外行星百科资料

HD 47536,又名CD-32 3216SAO 197019HR 2447,是一颗位於大犬座的恒星[1][2],视星等为5.27,位于銀經241.18,銀緯-16.78,其B1900.0坐标为赤經6h 34m 2.8s,赤緯-32° -16.78′ 17″。該恆星是一顆視星等5等的橙色 K 型巨星,距離地球約400光年。它的質量大約在1.1到3倍太陽質量之間。2007年在該恆星旁發現兩顆系外行星,是擁有行星的恆星中金屬量最低恆星之一。

行星系統

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Setiawan 於2002年發現了行星HD 47536 b[6],再於2007年發現HD 47536 c。

HD 47536的行星系
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b >4.96 MJ 1.61 430 0.2 ± 0.08
c >6.98 MJ 3.72 2500

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-05). 
  3. ^ 3.0 3.1 3.2 3.3 3.4 van Leeuwen, F. HIP 31688. Hipparcos, the New Reduction. 2007 [2010-03-13]. (原始内容存档于2019-03-28). 
  4. ^ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 da Silva, L.; et al, Basic physical parameters of a selected sample of evolved stars, Astronomy and Astrophysics, November 2006, 458 (2): 609–623, Bibcode:2006A&A...458..609D, arXiv:astro-ph/0608160可免费查阅, doi:10.1051/0004-6361:20065105 
  5. ^ Setiawan, J.; et al, Precise radial velocity measurements of G and K giants. Multiple systems and variability trend along the Red Giant Branch, Astronomy and Astrophysics, July 2004, 421: 241–254, Bibcode:2004A&A...421..241S, doi:10.1051/0004-6361:20041042-1 
  6. ^ Setiawan; et al. Evidence of a sub-stellar companion around HD 47536. Astronomy and Astrophysics. 2003, 398 (2): L19–L23 [2012-07-23]. Bibcode:2003A&A...398L..19S. doi:10.1051/0004-6361:20021846. (原始内容存档于2015-11-07). 

外部連結

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HD 47536
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