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2MASS J2126–8140

2MASS J21265040−8140293
太阳系外行星 太阳系外行星列表
母恒星
母恒星 TYC 9486-927-1
赤经 (α) 21:25:28.0[1]
赤纬 (δ) -81:38:28[1]
物理性质
质量(m)13.3 (± 1.7) [1] MJ
温度 (T) ~1,800 K(1,530 °C;2,780 °F)[1] K
轨道参数
半长轴 (a) 6900.0[1] AU
发现
发现时间 2009年发现时认定为棕矮星
2016年判定为太阳系外行星[1]
发现者 K. L. Cruz, J. D. Kirkpatrick,
A. J. Burgasser [1][2][3]
发现方法 直接摄影
发表论文 确认

2MASS J21265040−8140293,或称为2MASS J2126−8140[3],是一颗环绕红矮星TYC 9486-927-1的太阳系外行星[3],距离地球24.75± 4.25秒差距。该行星是已知的行星中轨道周期最长(接近100万年),并且距离母恒星最远的太阳系外行星(超过4500天文单位)。它的推测质量、光谱、表面有效温度都与已有大量研究成果的行星绘架座βb相近[3]

参考资料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Planet 2MASS J2126-8140. exoplanet.eu. [2016-01-27]. (原始内容存档于2020-04-28). 
  2. ^ Cruz, K.L.; Kirkpatrick, J.D.; Murphy, S. Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5. Astron. J. 2009, 137: 3445. 
  3. ^ 3.0 3.1 3.2 3.3 N. Deacon, J. Schleider, S. Murphy. A nearby young M dwarf with a wide, possibly planetary-mass companion. [2016-01-27]. (原始内容存档于2020-12-14). 


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2MASS J2126–8140
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