Psi2 Aurigae: Difference between revisions
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Latest revision as of 08:52, 21 July 2024
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Psi2 Aurigae, Latinized from ψ2 Aurigae, is a star in the constellation Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 4.79.[1] Based upon parallax measurements, this star is approximately Template:Convert away from the Earth. At that distance, the brightness of the star is diminished by 0.07 in magnitude from extinction caused by interstellar gas and dust.[2]
Most studies categorized this as a K-type giant star with a stellar classification of K3 III.[3] However, the results of a study published in 2003 list it with a classification of K3 Iab:, which would instead suggest it is a supergiant star.[4][5] The measured angular diameter of this star, after correction for limb darkening, is Template:Nowrap.[6] At the estimated distance of this star,[7] this yields a physical size of about 27 times the radius of the Sun.[8] It is radiating 304[9] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,410 K.[10]
It was also known to be part of a much bigger constellation named Telescopium Herschelii. It was also the constellation's second-brightest star before it was unrecognized by the International Astronomical Union (IAU).
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