HD 240210
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HD 240210 is a star in the northern constellation of Cassiopeia. It has an orange hue but is too faint to be viewed with the naked eye, having an apparent visual magnitude of 8.33.[3] Parallax measurements provide an estimate of its distance from the Sun as approximately 1,230 light years. It is drifting further away with a radial velocity of +8.6 km/s.[2]
This is an aging giant star with a class of K3,[3] which has exhausted the supply of hydrogen at its core and expanded to 25[2] times the radius of the Sun. It is around three[4] billion years old with 1.3[3] times the Sun's mass. The star is radiating 152 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,019 K.[2] It is spinning slowly, with each rotation taking at least Script error: No such module "convert"..[3]
On June 10, 2009 a planet orbiting the star was discovered by Niedzielski et al. This exoplanet is a 6.9 or greater Jupiter mass planet. Evidence for additional planetary companions has been found.[6]
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See also
References
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