Tags: Star.
Chi Ophiuchi (Chi Oph / χ Ophiuchi / χ Oph) is a Be star in the constellation of Ophiuchus. It has an apparent visual magnitude which varies between 4.18 and 5.0.This star is a proper motion member of the Upper Scorpius sub-group in theScorpius-Centaurus OB associationthe nearest such co-moving association of massive stars to the Sun.