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HR 7722 b
HR 7722 b is an exoplanet orbiting the star HR 7722.〔 It orbits its parent star with a semimajor axis of 0.32 ± 0.005 AU, an eccentricity of 0.13 ± 0.04. and an orbital period of 74.72 days.〔Open Exoplanet Catalogue, ( Gl 785b )〕 The Neptune-sized planet has at least 21 times the mass of Earth〔Andrew W. Howard, The NASA-UC Eta-Earth Program: III. A Super-Earth orbiting HD 97658 and a Neptune-mass planet orbiting Gl 785, ( et al. )〕 and 3 to 4 times its diameter. HR 7722 b was discovered on 1 November 2010 and lies within the inner edge of the habitable zone of HR 7722. == References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「HR 7722 b」の詳細全文を読む
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