[ is about 114 light years. On the celestial sphere it is located near the star Alpha Ophiuchi; their projected separation is just 3 light years, although their actual separation is much greater.[24]]The primary is an F-type main sequence star with a stellar classification of F4 Vw, where the w indicates relatively weak metallic features in the ultraviolet spectrum.[5] This star has 134% of the Sun's mass,[13] but only 97% of the solar radius.[14] It is spinning with a projected rotational velocity of 31.7 km/s,[4] and is around 1.2 billion years old.[13] The effective temperature of the outer atmosphere is 6,615 K,[4] giving it the yellow-white hue of an F-type star.[31] The abundance of elements other than hydrogen or helium, what astronomers term the metallicity, is similar to that in the Sun.[17]
It has a magnitude 9.38 companion star orbiting with a 144-year period, a semimajor axis spanning 1.04 arcseconds, and an eccentricity of 0.42.[21] There is a third, visual companion of magnitude 14.46 at an angular separation of 154.70 arcseconds along a position angle of 271°, as of 2001.[34]
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