Psi2 Piscium

Psi² Piscium (ψ² Piscium) is a white-hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of +5.56.^[2] Based upon an annual parallax shift of 8.66 mas as seen from Earth,^[1] it is located about 380 light years from the Sun. It has a peculiar velocity of 14.6±2.9 km/s, indicating it is a runaway star.^[9]

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

Psi² Piscium

Location of ψ2 Piscium (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Pisces
Right ascension	01h 07m 57.16387s[1]
Declination	+20° 44′ 20.8310″[1]
Apparent magnitude (V)	+5.56[2]
Characteristics
Spectral type	A3 V[3]
B−V color index	+0.12[2]
Astrometry
Radial velocity (Rv)	−15.2±0.9[4] km/s
Proper motion (μ)	RA: +86.72[1] mas/yr Dec.: −82.75[1] mas/yr
Parallax (π)	21.14±0.77 mas[1]
Distance	154 ± 6 ly (47 ± 2 pc)
Absolute magnitude (MV)	+2.19[5]
Details
Mass	1.82[6] M☉
Radius	2.0[7] R☉
Luminosity	13[3] L☉
Surface gravity (log g)	4.36±0.14[6] cgs
Temperature	8,611±293[6] K
Rotational velocity (v sin i)	149[3] km/s
Age	250[6] Myr
Other designations
ψ2 Psc, 79 Piscium, BD+19°185, HD 6695, HIP 5310, HR 328, SAO 74506[8]
Database references
SIMBAD	data

This is a suspected binary star system,^[10] with a companion star at an angular separation of 0.357±0.002 arc seconds along a position angle of 174.99°±0.30° from the primary, as of 2008. This corresponds to a projected separation of 16.88±0.62 AU.^[11] The brighter component is an A-type main sequence star with a stellar classification of A3 V.^[3] The system is a source of X-ray emission with a luminosity of 143.9×10²⁰ W, which is most likely originating from the cooler companion since A-type main sequence stars are not expected to be magnetically active.^[12]