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Omicron Draconis : ウィキペディア英語版 | Omicron Draconis
Omicron Draconis (ο Dra, ο Draconis) is a giant star in the constellation Draco located 322.93 light years from the Earth. It has a radius of 30 solar radii, and a luminosity of 269 suns. Its path in the night sky is circumpolar above the ecliptic, meaning the star never rises or sets when viewed in the night sky from certain positions in the northern hemisphere. Omicron Draconis can be considered the north pole star of Mercury, as it is the closest star to Mercury's north celestial pole. This is a spectroscopic binary system.〔 ==References==
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「Omicron Draconis」の詳細全文を読む
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