Lambda Ophiuchi
Star system
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λ Ophiuchi, Latinized as Lambda Ophiuchi, is a triple star system in the equatorial constellation of Ophiuchus. It has the traditional name Marfik, which now applies exclusively to the primary component. The system is visible to the naked eye as a... Wikipedia
Apparent magnitude (V): 3.82
Distance to Earth: 166.3 light years
B−V color index: +0.022±0.014
U−B color index: +0.01