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RS Persei is a red supergiant located in the Double Cluster in Perseus, a member of the cluster NGC 884. It is a semiregular variable star, whose brightness varies from magnitude 7.82 to 9.0, over a periods of 4200 ± 1500 days and 245 days. ==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「RS Persei」の詳細全文を読む スポンサード リンク
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