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Nu Aurigae
Variable star in the constellation Auriga From Wikipedia, the free encyclopedia
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Nu Aurigae is a star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinised from ν Aurigae, and abbreviated Nu Aur or ν Aur. This star is visible to the naked eye with an apparent visual magnitude of 3.96.[3] Based on parallax measurements, it is approximately 202 light-years (62 parsecs) distant from the Earth.[2] The star is drifting further away from the Sun with a radial velocity of +10 km/s.[6]
This is an evolved giant star with a stellar classification of G9.5 III.[10] At 1.1 billion years of age,[7] it is a red clump star that is generating energy through the fusion of helium at its core.[4] Its outer envelope has expanded to 18 times the radius of the Sun and cooled to 4,576 K,[8] giving it the characteristic yellow-hued glow of a G-type star.[11] It shines with 126 times the luminosity of the Sun[8] and has 2.12 times the Sun's mass.[7]
This is an astrometric binary with a suspected white dwarf companion.[5] Radial velocity variations suggest an orbital period of 20.18 ± 0.85 yr (7,370 ± 310 d) with a large eccentricity of 0.71.[12] A 10th-magnitude star 54.6 arcseconds away is an optical companion.
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