Psi3 Piscium
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 09m 49.20099s |
| Declination | +19° 39′ 30.2694″ |
| Apparent magnitude (V) | 5.562 |
| Characteristics | |
| Spectral type | F9 IIIa or G0 IV |
| B−V color index | −0.70 |
| Astrometry | |
| Radial velocity (Rv) | −6.6±2.1 km/s |
| Proper motion (μ) | RA: −6.064 mas/yr Dec.: +8.887 mas/yr |
| Parallax (π) | 7.5011±0.1014 mas |
| Distance | 435 ± 6 ly (133 ± 2 pc) |
| Absolute magnitude (MV) | +3.38 |
| Details | |
| Mass | 2.8 M☉ |
| Radius | 10.29+1.20 −0.20 R☉ |
| Luminosity | 95.5±1.6 L☉ |
| Surface gravity (log g) | 4.16±0.17 cgs |
| Temperature | 6,554+143 −85 K |
| Metallicity [Fe/H] | +0.88±0.21 dex |
| Rotation | 9 d |
| Rotational velocity (v sin i) | 87.7±4.4 km/s |
| Other designations | |
| ψ3 Psc, 81 Piscium, BD+18°153, HD 6903, HIP 5454, HR 339, SAO 92283 | |
| Database references | |
| SIMBAD | data |
Psi3 Piscium, which is Latinized from ψ3 Piscium, is a solitary, yellow-hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.562. Based upon an annual parallax shift of 7.5 mas as seen from Earth, it is located about 435 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.33 due to interstellar dust. The star is drifting closer to the Sun with a radial velocity of −7 km/s.
This F-type giant is a candidate horizontal branch star with a stellar classification of F9 IIIa. It is an X-ray source with a luminosity of (0.82±0.13)×1030 erg s−1 in the 0.3−10 keV band. The projected rotational velocity is 87.7±4.4 km/s and it has an effective temperature of 6,273. It has 2.8 times the mass of the Sun and 10.3 times the Sun's radius. The star is radiating 95.5 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,554 K.