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AC Herculis
AC Herculis, is a RV Tauri variable in the constellation of Hercules.〔 It ranges between apparent magnitudes 6.85 and 9.0 over a period of 75 days. The distance and mass of the star are uncertain, with AC Herculis calculated to have anywhere from 1 to 1.8 times the mass of the Sun. It has been found to have a circumstellar disk out to a radius of 200 astronomical units (AU). ==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「AC Herculis」の詳細全文を読む
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