Omicron Aurigae

Omicron Aurigae is an astrometric binary star system in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ο Aurigae, and abbreviated Omicron Aur or ο Aur. With an apparent visual magnitude of 5.47, it is faintly visible to the naked eye. Based upon an annual parallax shift of, it is approximately distant from Earth. It is drifting closer to the Sun with a radial velocity of −8 km/s. The star is a member of the Ursa Major stream of co-moving stars.
The visible component is a chemically peculiar star with a stellar classification of ; meaning this is an A-type star with a spectrum that shows anomalously high abundances of chromium and europium. A magnetic field has been detected and it is a source of X-ray emission with a luminosity of: log L_x = 29.1. The star has 1.9 times the mass of the Sun and 3.2 times the Sun's radius. It is spinning with a projected rotational velocity of 35 km/s and is radiating 50 times the Sun's luminosity from its photosphere at an effective temperature of 8,300 K.