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HD 159868
HD 159868 is a yellow dwarf star approximately 172 light-years away in the constellation of Scorpius. The star is thought to be 3.05 times more luminous than the Sun, yet the metallicity is identical to the Sun. == Planetary system ==
* In 2007, a planet of the star was announced by astronomer Simon J. O'Toole.〔 The planet (designated HD 159868 b) is likely to be a gas giant. The orbit is extremely eccentric at the average distance of 2 astronomical units (AU), ranging as close as 0.62 AU to as far as 3.38 AU. During its orbital period, the planet spends most of its time in the habitable zone of its star. * In 2012, a second planet of the star was announced by astronomer Robert. A. Wittenmyer.
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 159868」の詳細全文を読む
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