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R Centauri
R Centauri (R Cen) is a variable star in the constellation Centaurus. It is approximately 1300 light years from Earth. The primary component, R Centauri A, is a red M-type bright giant with a mean apparent magnitude of +7.18. It is classified as a Mira variable and its brightness varies from magnitude +5.3 to +11.8 with a period of 546.2 days. It is also an H2O maser. == 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「R Centauri」の詳細全文を読む
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