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24 Vulpeculae
Red clump giant star in the constellation Vulpecula From Wikipedia, the free encyclopedia
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24 Vulpeculae is a single,[8] yellow-hued star in the northern constellation of Vulpecula. It is faintly visible to the naked eye with an apparent visual magnitude of 5.30.[2] The distance to this star can be estimated from its annual parallax shift of 7.9700±0.0674,[1] which yields a separation of roughly 409 light years. It is moving further away with a heliocentric radial velocity of +15 km/s.[5]
This is an evolved giant star with a stellar classification of G8III,[2] having exhausted the hydrogen at its core and moved off the main sequence. It is a red clump giant, indicating it is presently on the horizontal branch and is generating energy through helium fusion in its core region.[3] The interferometry-measured angular diameter of 24 Vul is 1.08±0.02 mas,[9] which, at its estimated distance, equates to a physical radius of about 16 times the radius of the Sun.[6]
24 Vulpeculae is about 251[2] million years old and is spinning with a projected rotational velocity of 5.02 km/s.[4] It has 3.41 times the mass of the Sun and is radiating 191 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,981 K.[2] This is the probable (99.4% chance) source of X-ray emission coming from these coordinates.[10]
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