Magnitude 4.91 Apparent magnitude (V) 4.91 | Constellation Auriga | |
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Psi1 Aurigae (ψ1 Aur, ψ1 Aurigae) is the Bayer designation for a star in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.91. Based upon a measured annual parallax shift of 0.82 mas, it is approximately 4,000 light-years (1,200 parsecs) distant from the Earth.
This is a massive supergiant star with a stellar classification of M0 I. It is a slow irregular variable of the LC type, with its brightness varying in magnitude by 0.44. The star is more than 14 times as massive as the Sun and is blazing with 63,579 times the Sun's luminosity. This energy is being radiated into outer space from its outer atmosphere at an effective temperature of 3,750 K, giving it the orange-red hue of a cool M-type star.