Gamma Piscis Austrini

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Gamma Piscis Austrini
Diagram showing star positions and boundaries of the Piscis Austrinus constellation and its surroundings
Cercle rouge 100%.svg

Location of γ Piscis Austrini (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Piscis Austrinus
Right ascension 22h 52m 31.56s
Declination −32° 52' 31.6"
Apparent magnitude (V) +4.46
Distance 222 ly
(68 pc)
Spectral type A0III
Other designations
γ  Piscis Austrini, γ PsA, Gamma PsA, 22 Piscis Austrini, CCDM J22525-3253AB, GC 31895, HD 216336, HIP 112948, HR 8695, IDS 22470-3324, PPM 303110, SAO 214153, WDS J22525-3253AB

Gamma Piscis Austrini (Gamma PsA, γ Piscis Austrini, γ PsA) is multiple star system in constellation of Piscis Austrinus, with an apparent magnitude of +4.46. The primary component is a white A-type giant. It is approximately 222 light years from Earth. With a temperature estimated at 10,600 Kelvin, the star shines with a rather decent luminosity of 81 times that of the Sun.[1]

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.[2]

Gamma Piscis Austrini 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.[2]


In Chinese, 敗臼 (Bài Jiù), 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, γ Piscis Austrini itself is known as 敗臼三 (Bài Jiù sān, English: the Third Star of Decayed Mortar.)[3]