Mu Coronae Australis
# Mu Coronae Australis

Mu Coronae Australis (Mu CrA), Latinized from μ Coronae Australis, is a solitary yellow-hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 5.22, making it faintly visible to the naked eye. Gaia DR3 parallax measurements put it 386 light years away and is currently approaching the Solar System with a heliocentric radial velocity of −18.2 km/s. At its current distance, Mu CrA's brightness is diminished by 0.31 magnitudes due to interstellar dust. It has an absolute magnitude of −0.22.

Mu CrA has a stellar classification of G5/6 III, indicating that it is an evolved G-type star with the characteristics of a G5 and G6 giant star. At an age of 365 million years, the star has exhausted the supply of hydrogen at its core and has expanded to 11.4 times the radius of the Sun. At present it has 3.07 times the mass of the Sun and radiates 104 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,448 K. Mu CrA is slightly metal deficent and spins modestly with a projected rotational velocity of 7.7 km/s.

