Magnitude 5.75 Apparent magnitude (V) 5.75 | Constellation Auriga | |
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Psi9 Aurigae (ψ9 Aur, ψ9 Aurigae) is the Bayer designation for a star in the northern constellation of Auriga. It is dimly visible to the naked eye with an apparent visual magnitude of 5.75. Based upon an annual parallax shift of 2.59 mas, the distance to this star is approximately 1,300 light-years (400 parsecs).
The spectrum of Psi9 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.
References
Psi9 Aurigae Wikipedia(Text) CC BY-SA