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V1054 Ophiuchi, together with the star Gliese 643, is a nearby quintuple star system, located in constellation Ophiuchus at 21.05 light-years. It consists of five stars, all of which are red dwarfs. ==Overview== V1054 Ophiuchi/Gliese 643 has the largest number of stars of all star systems, located within 10 pc from Earth.〔 It is also the nearest quintuple star system〔 〕 (the next nearest star systems with at least five stars are GJ 2069 (quintuple)〔 at 41.8 light-years, and Castor〔 (sextuple) at 51.6 light-years), and only quintuple star system within 10 pc.〔 〕〔(RECONS CENSUS OF OBJECTS NEARER THAN 10 PARSECS )〕 The system consists of three widely separated parts: *close triple subsystem V1054 Ophiuchi A-Bab (including very close binary subsystem V1054 Ophiuchi Bab) *Gliese 643 *V1054 Ophiuchi C (vB 8) Hierarchy of the system is following:〔 } |2=V1054 Ophiuchi C (vB 8)}} }} |} System's five components are: The brightest and most massive of this five stars is V1054 Ophiuchi A. Close binary subsystem V1054 Ophiuchi B is more massive than V1054 Ophiuchi A, however, its total visual magnitude is 0.1 mag fainter than V1054 Ophiuchi A's visual magnitude.〔 Total apparent magnitude of V1054 Ophiuchi A-Bab triple subsystem is 9.02.〔〔 Despite V1054 Ophiuchi/Gliese 643 consists of small low-mass stars, system's total mass, due large number of components, exceeds Solar mass,〔 (it is about ). 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「V1054 Ophiuchi」の詳細全文を読む スポンサード リンク
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