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DY Persei
DY Persei is a variable star in the Perseus constellation, being a prototype star to the very rare type of DY Persei variables, that pulsate like red variables, but also fade from sight like R Coronae Borealis variables. DY Persei itself is an 11th magnitude carbon star that is too dim to see through binoculars. At its faintest it drops below 18th magnitude.〔 ==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「DY Persei」の詳細全文を読む
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