Pi Piscis Austrini

Pi Piscis Austrini, Latinized from π Piscis Austrini, is binary star system in the southern constellation of Piscis Austrinus, near the eastern constellation border with Sculptor. It has a yellow-white hue and is visible to the naked eye as a dim point of light with an apparent visual magnitude of 5.12. The system is located at a distance of 92 light-years from the Sun based on parallax. Its radial velocity is poorly constrained, but it appears to be drifting closer at a rate of around −6 km/s. Pi Piscis Austrini is moving through the galaxy at a velocity of 16.3 km/s relative to the Sun. Its projected galactic orbit carries it between 24,000 and 37,500 light-years from the center of the galaxy.
This is a single-lined spectroscopic binary system with an orbital period of 178.3 days and an eccentricity of 0.53. The primary component is an F-type main-sequence star with a stellar classification of . In 1965 it was designated a classical Cepheid variable star with a brightness that ranged from 5.10 to 5.12, but is now considered to be (most likely) constant. It displays an infrared excess, suggesting a circumstellar disk is orbiting at a radius of with a mean temperature of 90 K. The cooler secondary companion has a class of F3 V. The system appears to be a source of X-ray emission.