Ο_Aurigae
Omicron Aurigae
Star in the constellation Auriga
Omicron Aurigae, Latinized from ο Aurigae, is the Bayer designation for an astrometric binary[10] star system in the northern constellation of Auriga. With an apparent visual magnitude of 5.47,[2] it is faintly visible to the naked eye. Based upon an annual parallax shift of 7.89 ± 0.84 mas,[1] it is approximately 413 light-years (127 parsecs) distant from Earth. The star is a member of the Ursa Major stream of co-moving stars.[11]
The visible component is a chemically peculiar star with a stellar classification of A1 Cr Eu; meaning this is an A-type star with a spectrum that shows abnormally high abundances of chromium (Cr) and europium (Eu).[3] A magnetic field has been detected and it is a source of X-ray emission with a luminosity of: log Lx = 29.1.[11] It is spinning with a projected rotational velocity of 29 km/s[8] and is radiating 95[6] times the Sun's luminosity from its photosphere at an effective temperature of 8,660 K.[7]