23 Vulpeculae
# 23 Vulpeculae

23 Vulpeculae is a triple star system in the northern constellation of Vulpecula. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.52 and it is located approximately 327 light years away from the Sun based on parallax. The system is moving further from the Earth with a heliocentric radial velocity of +1.47 km/s.

Component A forms a binary system with an orbital period of 25.33 years, an eccentricity of 0.40, and a semimajor axis of 0.11″. The 4.80 magnitude member of this pair, component Aa is an aging giant star with a stellar classification of K3- III Fe-1, where the suffix indicates an underabundance of iron in the spectrum. This star has 2.4 times the mass of the Sun and is radiating 146 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,429 K. Its companion, component Ab, has magnitude 6.5. The tertiary member, component B, has a separation of 0.26" and a magnitude of 6.94.

