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X Persei
X Persei is a binary star system located in the constellation Perseus. X Persei A is either an O-type giant or a B-type main sequence star, which is orbited by a neutron star (X Persei B).〔(【引用サイトリンク】V * X Per – High Mass X-ray Binary )〕 With an apparent magnitude of 6.72, it is too dim to be seen even on the best nights.〔 The system is an X-ray source and the primary star appears to be suffering from substantial mass loss. ==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「X Persei」の詳細全文を読む
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