Alqubba

Alqubba is a solitary star located in the southern constellation Corona Australis. Its Bayer designation is Latinized from β Coronae Australis, and abbreviated Beta CrA or β CrA. This body is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.10. The star is located around 470 light years distant from the Sun based on parallax, and is drifting further away with a radial velocity of 2.7 km/s. At its current distance, Beta CrA's brightness is diminished by 0.29 magnitudes due to interstellar dust. Alqubba has a stellar classification of K0 II/III CN1.5, indicating that it is an evolved K-type star with the blended luminosity class of a bright giant and a regular giant star. The suffix CN1.5 indicates that the object has an anomalous overabundance of cyano radicals in its spectrum, making it a CN star. Having exhausted the supply of hydrogen at its core, the star has expanded to 39 times the Sun's girth. It has 5.17 times the mass of the Sun shines with a luminosity 614 times that of the Sun from its photosphere at a surface temperature of 4,575 K. Alqubba is metal enriched (174% solar iron abundance) and spins modestly with a projected rotational velocity of 6.2 km/s.