Gamma Piscis Austrini
Gamma Piscis Austrini is binary star system in the southern constellation of Piscis Austrinus. It is visible to the naked eye with a combined apparent visual magnitude of +4.448. As of 2010, the pair had an angular separation of 4 arc seconds along a position angle of 255°. Based upon an annual parallax shift of 15.14 mas as seen from the Earth, the system is located about 215 light years from the Sun.
The magnitude 4.59 primary, component A, is a white-hued, chemically peculiar A-type main sequence star with a stellar classification of. It is an estimated 214 million years old with 2.63 times the mass of the Sun. The fainter magnitude 8.20 companion, component B, is an F-type main sequence star with a class of F5 V.
Gamma Piscis Austrini is moving through the Galaxy at a speed of 24.1 km/s relative to the Sun. Its projected Galactic orbit carries it between 21,600 and 30,800 light years from the center of the Galaxy. It came closest to the Sun 1.8 million years ago when it had brightened to magnitude 3.78 from a distance of 157 light years.Naming
In Chinese, 敗臼, meaning Decayed Mortar, refers to an asterism consisting of refers to an asterism consisting of γ Piscis Austrini, γ Gruis, λ Gruis and 19 Piscis Austrini. Consequently, the Chinese name for γ Piscis Austrini itself is 敗臼三
