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HD 181068
HD 181068 is a triple star system comprising a red giant: HD 181068A and two red dwarfs: HD 181068B and HD 181068C. The system is notable for the unique triply eclipsing variations that are observed as each star passes behind or in front of the others. The primary star HD 181068A is also unusual in that it does not exhibit internal seismic oscillations as have been detected in other red giants. HD 181068A is estimated to be 12.4 times larger than our Sun.〔(Kepler discovery of a unique triply eclipsing triple star ) ''NASA Kepler News'', April 7, 2011〕〔(HD 181068: A Red Giant in a Triply Eclipsing Compact Hierarchical Triple System ) Report abstract, ''Science'', April 8, 2011〕
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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