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HD 240237 is a red giant approximately 5000 light-years away in the constellation Cassiopeia.〔 The star has an exoplanet orbiting slightly within the star's habitable zone with a temperature of roughly 510 Celsius (950 Fahrenheit), comparing it to Venus in our own solar system. It was detected by Radial velocity in 2010. ==About the Star== Name: HD 240237 Distance: 1500.0 pc Spectral type: K2III Apparent magnitude: V 8.19 Mass: 1.69 (± 0.42) MSun Age: — Effective temperature: 4361.0 (± 10.0) K Radius: 32.0 (± 1.0) RSun Metallicity: () -0.26 (± 0.07) RA2000 23:15:42.0 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「HD 240237」の詳細全文を読む スポンサード リンク
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