F_Lupi
2 Lupi
Star in the constellation Lupus
2 Lupi is a single[7] star in the southern constellation of Lupus,[6] located 326 light-years away from the Sun.[1] It has the Bayer designation f Lupi; 2 Lupi is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.33.[2] It is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.[5]
This is an aging giant star with a stellar classification of K0 IIIa CH-1.[3] The suffix notation indicates abnormally weak lines of carbyne. Having exhausted the hydrogen at its core, the star evolved away from the main sequence by expanding to 11[5] times the Sun's radius. The star is radiating 65.6[5] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,953 K.[5] It is a suspected variable star of unknown type.[8]