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Star in the constellation Pisces From Wikipedia, the free encyclopedia
Mu Piscium (μ Piscium) is a solitary,[8] orange-hued star in the zodiac constellation of Pisces. It is visible to the naked eye with an apparent visual magnitude of 4.84.[2] Based upon an annual parallax shift of 10.73 mas as seen from Earth,[1] it is located about 304 light years from the Sun. Given this distance, it has a relatively high proper motion, advancing 296 mas per year across the sky.[9]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pisces |
Right ascension | 01h 30m 11.11444s[1] |
Declination | +06° 08′ 37.7577″[1] |
Apparent magnitude (V) | +4.84[2] |
Characteristics | |
Spectral type | K4 III[2] |
B−V color index | 1.38[2] |
Astrometry | |
Radial velocity (Rv) | +34.19[2] km/s |
Proper motion (μ) | RA: +292.00[1] mas/yr Dec.: −45.95[1] mas/yr |
Parallax (π) | 10.73 ± 0.19 mas[1] |
Distance | 304 ± 5 ly (93 ± 2 pc) |
Absolute magnitude (MV) | −0.37[3] |
Details | |
Mass | 1.25[2] M☉ |
Radius | 37[4] R☉ |
Luminosity | 186[2] L☉ |
Surface gravity (log g) | 2.07[5] cgs |
Temperature | 4,126±27[2] K |
Metallicity [Fe/H] | −0.39[3] dex |
Rotational velocity (v sin i) | 1.0[6] km/s |
Age | 5.57[2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K4 III.[2] It has an estimated 1.25[2] times the mass of the Sun and, at the age of 5.6 billion years, has expanded to about 37[4] times the Sun's radius. From this enlarged photosphere, it is radiating 186[2] times the Sun's luminosity at an effective temperature of 4,126 K.[2] It has a magnitude 12.02 visual companion at an angular separation of 209.30 arc seconds along a position angle of 298°, as of 2012.[10]
In Chinese, 外屏 (Wài Píng), meaning Outer Fence, refers to an asterism consisting of refers to an asterism consisting of μ Piscium, δ Piscium, ε Piscium, ζ Piscium, ν Piscium, ξ Piscium and α Piscium. Consequently, the Chinese name for μ Piscium itself is 外屏四 (Wài Píng sì, English: the Fourth Star of Outer Fence.)[11]
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