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HD 13931 b (also known as HIP 10626 b) is an extrasolar planet which orbits the G-type star HD 13931, located approximately 144 light years away in the constellation Andromeda. This planet takes 11.55 years to orbit the star at the average distance of 5.15 AU or 770 Gm. The planet’s eccentricity (0.02) is about the same as Earth.〔 The orbital distance for this planet ranges from 5.05 to 5.25 AU. This planet was discovered by using radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009. == See also == Other planets that were discovered or confirmed on November 13, 2009: * HD 34445 b * HD 126614 Ab * HD 24496 Ab * Gliese 179 b * QS Virginis b 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 13931 b」の詳細全文を読む スポンサード リンク
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