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Psi9 Aurigae : ウィキペディア英語版 | Psi9 Aurigae
Psi9 Aurigae (ψ9 Aur, ψ9 Aurigae) is the Bayer designation for a star in the northern constellation of Auriga. It is dimly visible to the naked eye with an apparent visual magnitude of 5.75.〔 Based upon an annual parallax shift of 2.59 mas,〔 the distance to this star is approximately . The spectrum of Psi9 Aurigae matches a giant star with a stellar classification of B8 IIIe.〔 The 'e' suffix indicates this is a Be star that shows emission lines of hydrogen in its spectrum. This is caused by a circumstellar shell of hot gas. The emission undergoes variability on a time scale of sixteen years.〔 ==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「Psi9 Aurigae」の詳細全文を読む
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