49 Cassiopeiae

49 Cassiopeiae is a binary star[8] system in the northern circumpolar constellation of Cassiopeia. It is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 5.22.[2] The system is located about 412 light years away from the Sun, based on parallax. The pair had an angular separation of 5.40″ along a position angle of 244°, as of 2008, with the brighter component being of magnitude 5.32 and its faint companion having magnitude 12.30.[3]

The primary, designated component A,[3] is an aging giant star with a stellar classification of G8III.[4] It is 302 million years old with 3.3 times the mass of the Sun.[5] With the supply of hydrogen at its core exhausted, the star has now expanded to 16[1] times the Sun's radius. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core.[9] The star is radiating 142[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,957 K.[1] Its faint secondary companion, component B, is of an unknown spectral type.