Gamma Piscis Austrini

Gamma Piscis Austrini

Location of γ Piscis Austrini (circled)

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Piscis Austrinus
Right ascension	22^h 52^m 31.56^s
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]

Naming

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]

References

1. GAMMA PSA (Gamma Piscis Austrini)
2. Gamma Piscis Austrini (HIP 112948)
3. (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 5 日