Gamma Piscis Austrini, a white main-sequence star in Piscis Austrinus
Gamma Piscis Austrini is a white main-sequence star in the constellation Piscis Austrinus. At 223 light years away, it shines at an apparent visual magnitude of 4.51.
Gamma Piscis Austrini (HIP 112948)
Gamma Piscis Austrini is a white main-sequence star in the constellation Piscis Austrinus. At 223 light years away, it shines at an apparent visual magnitude of 4.51. It is moving through the Galaxy at a speed of 22.2 km/s relative to the Sun.
Sky position: RA 22h 52.5m, Dec -32° 52.5'
Common designations: Gamma Piscis Austrini, 22 Piscis Austrini, HR 8695, HD 216336, Gaia DR3 6602839458218253824, HIP 112948, GJ 9800 A
Gamma Piscis Austrini has the spectral type A0VpSrCrEu. A-type stars are white stars with surface temperatures of roughly 7,500 to 10,000 K. Their spectra are dominated by strong hydrogen lines, and many of them rotate rapidly. Its luminosity class V means it is a main-sequence (dwarf) star, still fusing hydrogen into helium in its core like the Sun.
How to find Gamma Piscis Austrini in the sky
Gamma Piscis Austrini lies in Piscis Austrinus. With a declination of -32° 52.5', it is visible from the entire Southern Hemisphere and from the Northern Hemisphere up to about latitude 57° N. Observers poleward of latitude 57° S see it as circumpolar: it never sets. It is bright enough to see with the naked eye under dark skies. It is highest in the sky at local midnight around September, which makes the weeks around that month the best time to observe it.
Tabulated data for Gamma Piscis Austrini
Astrometry and spectroscopy
| Right Ascension (J2000) | 343.13137566° (22h 52.5m) |
| Declination (J2000) | -32.87546049° (-32° 52.5') |
| Galactic Longitude | 13.05851553° |
| Galactic Latitude | -63.71458281° |
| Proper motion RA | -30.95 mas/yr |
| Proper motion Dec | -33.89 mas/yr |
| Parallax | 14.63 ± 0.82 mas |
| Spectral Type | A0VpSrCrEu |
| Radial Velocity | 16.50 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| U | 4.28 | 0.11 |
| B | 4.46 | 0.29 |
| V | 4.51 | 0.34 |
| J | 4.45 | 0.28 |
| H | 4.41 | 0.24 |
| K | 4.48 | 0.30 |
Colour index B-V: -0.05
Derivations
- Heliocentric distance: 68.33 pc (223 light years) (5.6% margin of error)
- Absolute visual magnitude: 0.34
- Transverse velocity: 14.9 km/s
- Space velocity relative to the Sun: 22.2 km/s
- Galactic position (X, Y, Z): 29.5 pc, 6.8 pc, -61.3 pc
- Galactic velocity (U, V, W): 18.9 km/s, -6.0 km/s, -10.0 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.