Psi-2 Piscium, a white main-sequence star in Pisces
Psi-2 Piscium is a white main-sequence star in the constellation Pisces. At 182 light years away, it shines at an apparent visual magnitude of 5.56.
Psi-2 Piscium (HIP 5310)
Psi-2 Piscium is a white main-sequence star in the constellation Pisces. At 182 light years away, it shines at an apparent visual magnitude of 5.56. It is moving through the Galaxy at a speed of 34.0 km/s relative to the Sun.
Sky position: RA 1h 8.0m, Dec +20° 44.3'
Common designations: Psi-2 Piscium, 79 Piscium, HR 328, HD 6695, HIP 5310, Gaia DR3 2790213894550349824
Psi-2 Piscium has the spectral type A3V. 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 Psi-2 Piscium in the sky
Psi-2 Piscium lies in Pisces. With a declination of +20° 44.3', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 69° S. It is bright enough to see with the naked eye under dark skies. It is highest in the sky at local midnight around November, which makes the weeks around that month the best time to observe it.
Tabulated data for Psi-2 Piscium
Astrometry and spectroscopy
| Right Ascension (J2000) | 16.98818325° (1h 8.0m) |
| Declination (J2000) | 20.73906955° (+20° 44.3') |
| Galactic Longitude | 128.12750299° |
| Galactic Latitude | -41.96601436° |
| Proper motion RA | 87.68 mas/yr |
| Proper motion Dec | -90.07 mas/yr |
| Parallax | 17.96 ± 0.58 mas |
| Spectral Type | A3V |
| Radial Velocity | -7.63 km/s |
Photometry
| Band | Magnitude | Abs. Mag. |
|---|---|---|
| B | 5.68 | 1.96 |
| V | 5.56 | 1.83 |
| J | 5.28 | 1.55 |
| H | 5.27 | 1.54 |
| K | 5.22 | 1.49 |
Colour index B-V: +0.12
Derivations
- Heliocentric distance: 55.69 pc (182 light years) (3.3% margin of error)
- Absolute visual magnitude: 1.83
- Transverse velocity: 33.2 km/s
- Space velocity relative to the Sun: 34.0 km/s
- Galactic position (X, Y, Z): -25.6 pc, 32.6 pc, -37.2 pc
- Galactic velocity (U, V, W): -7.3 km/s, -31.4 km/s, -11.0 km/s
Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.