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葛利斯649

葛利澤649
Gliese 649
觀測資料
曆元 J2000.0
星座 武仙座
星官
赤經 16h 58m 08.85s
赤緯 +25° 44′ 38.97″
視星等(V) 9.62
特性
光谱分类M1.5V
视星等 (B)11.21
视星等 (R)8.8
视星等 (I)8.0
视星等 (J)6.448
视星等 (H)5.865
视星等 (K)5.624
B−V 色指数1.496
V−R 色指数0.8
R−I 色指数0.8
天体测定
徑向速度 (Rv)6.4 km/s
自行 (μ) 赤经:-113.25 mas/yr
赤纬:-507.76 mas/yr
视差 (π)96.233 ± 1.48 mas
距离33.892 ly
(10.34 pc)
绝对星等 (MV)9.595
詳細資料
質量0.54 M
半徑0.52 R
亮度0.045 L
溫度3690 K
金屬量0.08
其他命名
HIP 83043, GJ 649, TYC 2063-00479-1, IRAS 16560+2549, BD+25 3173, 2MASS J16580884+2544392
參考資料庫
SIMBAD资料
系外行星資料庫英语Exoplanet Archive资料
ARICNS资料
系外行星百科资料

葛利澤649Gliese 649)是一個位於武仙座紅矮星,距離地球約34光年。目前該恆星旁已發現一顆系外行星

行星系統

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2009年 Johnson 等人偵測到在葛利澤649旁有一顆質量相當於土星的系外行星[1]。該行星的質量是木星的32.8%,距離母恆星1.15天文單位,軌道離心率0.3。假設母恆星的光度是太陽的4.5%,那該恆星的適居帶位於0.21天文單位處,因此該行星的溫度相當於距離類太陽恆星5.5天文單位行星的溫度。而行星和母恆星距離在0.8到1.49天文單位之間改變,因此該行星可能有季節性氣候變化。

葛利斯649的行星系[1]
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 ≥0.328 MJ 1.135 598.3 0.30

參考資料

[编辑]
  1. ^ 1.0 1.1 Johnson; et al. The California Planet Survey II. A Saturn-Mass Planet Orbiting the M Dwarf Gl649. 2009. arXiv:0912.2730可免费查阅. 

參見

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葛利斯649
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