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54 Piscium b : ウィキペディア英語版 | 54 Piscium b
54 Piscium b (HD 3651 b), occasionally catalogued as 54 Piscium Ab in order to differentiate from the brown dwarf in the system, is an extrasolar planet〔〔 approximately 36 light-years away in the constellation of Pisces. The planet was discovered orbiting the orange dwarf star 54 Piscium. The planet's minimum mass is one fifth that of Jupiter, and it orbits the star in a very eccentric orbit about every two months. == Discovery ==
On January 16, 2002, a team of astronomers (led by Geoff Marcy) announced the discovery of an extrasolar planet around 54 Piscium using the radial velocity method,〔 a process utilizes the "wobbling" effect that a star may experience if something is tugging on it, to define the presence of a planetary body. The planet has been estimated to have a mass of only 20 percent that of Jupiter (making the planet around the same size and mass of Saturn).
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「54 Piscium b」の詳細全文を読む
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