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31 Cygni
31 Cygni, also known as Omicron1 Cygni or V695 Cygni, is a star in the constellation Cygnus. An Algol-type eclipsing binary, it ranges between magnitudes 3.73 and 3.89 over a period of ten years; the component stars are an orange supergiant of spectrial type K4Iab and a blue-white star likely to be evolving off the main sequence with a spectral type of B4IV-V.〔 ==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「31 Cygni」の詳細全文を読む
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