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开普勒20e

开普勒20e
轨道数据
半主轴 (a) 0.0537 AU[1]
离心率 (e) < 0.28[1]
公转周期 (P) 6.098493 ± 0.000065[1]
轨道倾角 (i) 87.50+0.33
−0.34
[1]
近日点经度 (ϖ)
近日点时间 (τ) ?
物理数据
质量 (MJ) 0.39-1.67M(理论推测)
< 3.08M光谱学[1]
半径 (RJ) 0.868+0.074
−0.096
R[1]
密度 (kg/) ?
温度 (K) 1040 ± 22[1]
天体发现
发现日期 2011年12月20日
侦测方式 凌日
发现者 F. Fressin et al.[2]

开普勒20eKepler-20e)是一颗围绕着恒星开普勒20公转的太阳系外行星。它距离太阳大约950光年,位于天琴座。开普勒20e的半径略小于地球金星[3]

开普勒20e(左一)、金星(左二)、地球(左三)和开普勒20f的大小比较

它和另一颗类似地球体积的行星开普勒20f一同被发现[3],这项成果于2011年12月20日公布。从热木星热海王星,再到超级地球,一些体积近似于地球的天体已被证实存在于类似太阳的恒星周围。这是首颗被发现体积比地球小的太阳系外行星[4]

参考资料

  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 a Search for Habitable Planets. NASA Ames Research Center – Kepler. 美国国家航空航天局. [2011-12-21]. (原始内容存档于2017-03-31) (英语). 
  2. ^ Francois Fressin; Guillermo Torres; Jason F. Rowe; David Charbonneau; Leslie A. Rogers; Sarah Ballard; Natalie M. Batalha; William J. Borucki; Stephen T. Bryson; Lars A. Buchhave; David R. Ciardi; Jean-Michel Désert; Courtney D. Dressing; Daniel C. Fabrycky; Eric B. Ford; Thomas N. Gautier III; Christopher E. Henze; Matthew J. Holman; Andrew Howard; Steve B. Howell; Jon M. Jenkins; David G. Koch; David W. Latham; Jack J. Lissauer; Geoffrey W. Marcy; Samuel N. Quinn; Darin Ragozzine; Dimitar D. Sasselov; Sara Seager; Thomas Barclay; Fergal Mullally; Shawn E. Seader; Martin Still; Joseph D. Twicken; Susan E. Thompson; Kamal Uddin. Two Earth-sized planets orbiting Kepler-20 (html). 自然. 2011年12月20日 [2011年12月21日] (英语). 
  3. ^ 3.0 3.1 First Earth-size Planets Discovered Beyond Our Solar System. 美国国家航空航天局. [2011-12-21]. (原始内容存档于2019-05-04) (英语). 
  4. ^ NASA Discovers First Earth-size Planets Beyond Our Solar System (html). NASA. 2011-12-20 [2017-02-19]. (原始内容存档于2019-05-04) (美国英语). 


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开普勒20e
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