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Star in the constellation Pisces From Wikipedia, the free encyclopedia
Pi Piscium (π Piscium) is a solitary,[8] yellow-white hued star in the zodiac constellation of Pisces. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.60.[2] Based upon an annual parallax shift of 28.50 mas as seen from Earth,[1] it is located about 1114 light years from the Sun. It is a member of the thin disk population of the Milky Way.[5]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 01h 37m 05.91523s[1] |
Declination | +12° 08′ 29.5186″[1] |
Apparent magnitude (V) | 5.60[2] |
Characteristics | |
Spectral type | F0 V[3] |
Astrometry | |
Radial velocity (Rv) | −1.0[2] km/s |
Proper motion (μ) | RA: −77.29[1] mas/yr Dec.: +9.13[1] mas/yr |
Parallax (π) | 28.50 ± 0.97 mas[1] |
Distance | 114 ± 4 ly (35 ± 1 pc) |
Absolute magnitude (MV) | +2.94[2] |
Details | |
Mass | 1.51±0.02[4] M☉ |
Luminosity | 6.3[4] L☉ |
Surface gravity (log g) | 4.00[2] cgs |
Temperature | 6,850[2] K |
Metallicity [Fe/H] | −0.45±0.05[5] dex |
Rotational velocity (v sin i) | 105.9[2] km/s |
Age | 2.0[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is an ordinary F-type main-sequence star with a stellar classification of F0 V.[3] At the estimated age of two billion years,[6] it is about 55% of the way through its main sequence lifetime[4] and still has a relatively high rate of spin with a projected rotational velocity of 105.9 km/s.[2] The star has 1.5[4] times the mass of the Sun and is radiating 6.3[4] times the Sun's luminosity at an effective temperature of 6,850 K.[2]
In Chinese, 右更 (Yòu Gèng), meaning Official in Charge of the Pasturing, refers to an asterism consisting of refers to an asterism consisting of π Piscium, η Piscium, ρ Piscium, ο Piscium and 104 Piscium. Consequently, the Chinese name for π Piscium itself is 右更三 (Yòu Gèng sān, English: the Third Star of Official in Charge of the Pasturing.)[9]
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