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出典:『Wikipedia』 (2011/03/14 22:34 UTC 版)

英語による解説

引用

HR 6902 (also designated V2291 Oph) is a binary system located 805 light years away from Sun in the Ophiuchus constellation. The system includes an orange bright giant star and a B-type main sequence star, forming an eclipsing binary of Zeta Aurigae type. The system is also surrounded by a warm circumstellar envelope and the spectra show silicon and carbon absorption up to a distance of 3.3 giant radii .