Psi<sup>9</sup> Aurigae is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from ÃÂ<sup>9</sup> Aurigae, and abbreviated Psi<sup>9</sup> Aur or ÃÂ<sup>9</sup> Aur. This star is dimly visible to the naked eye with an apparent visual magnitude of 5.75. Based upon an annual parallax shift of , the distance to this star is approximately . It is drifting closer to the Sun with a radial velocity of âÂÂ41 km/s. This is most likely (88.5% chance) a runaway star, having a peculiar velocity of 31.8 km/s.
The spectrum of Psi<sup>9</sup> Aurigae matches a giant star with a stellar classification of B8 IIIe. The 'e' suffix indicates this is a Be star that shows emission lines of hydrogen in its spectrum. This is caused by a circumstellar shell of hot gas. The emission undergoes variability on a time scale of sixteen years. This star is spinning rapidly with a projected rotational velocity of 235 km/s. It has 2.4 times the mass of the Sun and 3.7 times the Sun's radius. ÃÂ<sup>9</sup> Aur is radiating 868 times the luminosity of the Sun from its photosphere at an effective temperature of 9,573 K.