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V Coronae Australis : ウィキペディア英語版 | V Coronae Australis
V Coronae Australis (V CrA) is a R Coronae Borealis variable star in the constellation Corona Australis. These are extremely hydrogen-deficient supergiants thought to have arisen as the result of the merger of two white dwarfs; fewer than 100 have been discovered as of 2012. V Coronae Borealis dimmed in brightness from 1994 to 1998. It has around 60% the mass of the Sun and an effective (surface) temperature of around 6250 K. ==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「V Coronae Australis」の詳細全文を読む
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