23_Cygni
23 Cygni
Star in the constellation Cygnus
23 Cygni is a single,[2] blue-white hued star in the northern constellation Cygnus. It is a faint star, visible to the naked eye, with an apparent visual magnitude of 5.14.[2] The distance to this star, as estimated from its annual parallax shift of 5.9 mas,[1] is about 550 light years. It is moving closer to the Earth with a heliocentric radial velocity of −32 km/s,[4] and is expected to come as near as 166 light-years in around 5.6 million years.[2] At that distance, the current star would be of magnitude 2.24.[8]
This is an ordinary B-type main-sequence star of spectral type B5V, a star that is generating energy through hydrogen fusion at its core. It is roughly 26[2] million years old with 4.7[6] times the mass of the Sun and 4.3 times the Sun's radius.[2] The star has a high rate of spin, having a projected rotational velocity of 145 km/s.[2] It is radiating 612[5] times the Sun's luminosity from its photosphere at an effective temperature of 14,893 K.[2]