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Gamma Coronae Borealis : ウィキペディア英語版 | Gamma Coronae Borealis
Gamma Coronae Borealis (γ CrB) is a star in the constellation Corona Borealis. A spectroscopic binary system, its components orbit each other every 92.94 years and are roughly as far apart from each other as the Sun and Neptune. The individual stars have visual magnitudes of 4.04 and 5.60, and spectral types B9V and A3V. When discovered to be variable in 1970, it was classified as a Delta Scuti variable with the earliest known spectral type of any known at the time and an amplitude of 0.05 magnitudes, but it was soon realized that the nature of its variations was likely different from other Delta Scuti variables. It is now known that stars with such spectral types can have pulsations similar to those of Delta Scuti variables. ==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「Gamma Coronae Borealis」の詳細全文を読む
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