Psi3 Piscium

Psi³ Piscium, which is Latinized from ψ³ Piscium, is a solitary,^[10] 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.^[2] Based upon an annual parallax shift of 7.5 mas as seen from Earth,^[1] 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.^[4] The star is drifting closer to the Sun with a radial velocity of −7 km/s.^[5]

For other stars with this Bayer designation, see ψ Piscium (disambiguation).

Psi³ Piscium

Location of ψ3 Piscium (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Pisces
Right ascension	01h 09m 49.20099s[1]
Declination	+19° 39′ 30.2694″[1]
Apparent magnitude (V)	5.562[2]
Characteristics
Spectral type	F9 IIIa[3] or G0 IV[4]
B−V color index	−0.70[2]
Astrometry
Radial velocity (Rv)	−6.6±2.1[5] km/s
Proper motion (μ)	RA: −6.064[1] mas/yr Dec.: +8.887[1] mas/yr
Parallax (π)	7.5011±0.1014 mas[1]
Distance	435 ± 6 ly (133 ± 2 pc)
Absolute magnitude (MV)	+3.38[6]
Details
Mass	2.8[7] M☉
Radius	10.29+1.20 −0.20[1] R☉
Luminosity	95.5±1.6[1] L☉
Surface gravity (log g)	4.16±0.17[8] cgs
Temperature	6,554+143 −85[8] K
Metallicity [Fe/H]	+0.88±0.21[8] dex
Rotation	9 d[7]
Rotational velocity (v sin i)	87.7±4.4[6] km/s
Other designations
ψ3 Psc, 81 Piscium, BD+18°153, HD 6903, HIP 5454, HR 339, SAO 92283[9]
Database references
SIMBAD	data

This F-type giant is a candidate horizontal branch^[8] star with a stellar classification of F9 IIIa.^[3] 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.^[7] The projected rotational velocity is 87.7±4.4 km/s and it has an effective temperature of 6,273.^[6] It has 2.8^[7] times the mass of the Sun and 10.3^[1] times the Sun's radius. The star is radiating 95.5^[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,554 K.^[8]