Rho Piscium

Rho Piscium (ρ Piscium) is a solitary,^[12] yellow-hued star in the zodiac constellation of Pisces. With an apparent visual magnitude of +5.34,^[2] it is faintly visible to the naked eye. Based upon an annual parallax shift of 39.66 mas as seen from Earth,^[1] it is located 82 light years from the Sun. It is a member of the thin disk population of the Milky Way.^[9]

Rho Piscium

Location of ρ Piscium (circled)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Pisces
Right ascension	01h 26m 15.26209s[1]
Declination	+19° 10′ 20.4526″[1]
Apparent magnitude (V)	+5.344[2]
Characteristics
Spectral type	F2 V[3]
B−V color index	+0.374[2]
Astrometry
Radial velocity (Rv)	−7.7±1.0[4] km/s
Proper motion (μ)	RA: −26.89[1] mas/yr Dec.: +11.12[1] mas/yr
Parallax (π)	39.66±0.25 mas[1]
Distance	82.2 ± 0.5 ly (25.2 ± 0.2 pc)
Absolute magnitude (MV)	+3.34[5]
Details
Mass	1.31[6] M☉
Radius	1.1[7] R☉
Luminosity	3.6[8] L☉
Surface gravity (log g)	4.41±0.14[6] cgs
Temperature	6,822±232[6] K
Metallicity [Fe/H]	−0.31[9] dex
Rotational velocity (v sin i)	60.1[10] km/s
Age	778[6] Myr
Other designations
ρ Psc, 93 Piscium, BD+18°187, HD 8723, HIP 6706, HR 413, SAO 92436[11]
Database references
SIMBAD	data

This is an F-type main sequence star with a stellar classification of F2 V.^[3] It is a suspected variable star that ranges in magnitude from a maximum of 5.35 to a minimum of 5.44 magnitude.^[13] The star is a source of X-ray emission with a luminosity of 117.6×10²⁰ W.^[14] It is 778^[6] million years old and is spinning with a projected rotational velocity of 60.1 km/s.^[10] The star has 1.3^[6] times the mass of the Sun and about 1.1^[7] times the Sun's radius. It is radiating 3.6^[8] times the Sun's luminosity from its photosphere at an effective temperature of 6,822 K.^[6]

Naming

In Chinese, 右更 (Yòu Gèng), meaning Official in Charge of the Pasturing, refers to an asterism consisting of ρ Piscium, η Piscium, π Piscium, ο Piscium and 104 Piscium. Consequently, the Chinese name for ρ Piscium itself is 右更一 (Yòu Gèng yī, English: the First Star of Official in Charge of the Pasturing.)^[15]