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Pi Ursae Majoris : ウィキペディア英語版 | Pi Ursae Majoris
The Bayer designation Pi Ursae Majoris (π UMa, π Ursae Majoris) is shared by two stars in the constellation Ursa Major: * Pi¹ Ursae Majoris (3 Ursae Majoris) * Pi² Ursae Majoris (4 Ursae Majoris) They are separated by 0.70° in the sky. They are sometimes given the name Muscida, which can also refer to ο Ursae Majoris. The two stars, Pi¹ and Pi² together, are considered an optical double star. They are not a binary star, in that they are not gravitationally linked, but they are close to each other as seen in the sky, and so are optically associated.
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「Pi Ursae Majoris」の詳細全文を読む
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