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HD 220689 is a G-class yellow dwarf star. ==Planetary system== From 1998 to 2012, the star was under observation from the CORALIE echelle spectrograph at La Silla Observatory. In 2012, a long-period, wide-orbiting planet was deduced by radial velocity. This was published in November.〔 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 220689」の詳細全文を読む スポンサード リンク
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