109 Piscium
G-type main sequence star in the constellation Pisces / From Wikipedia, the free encyclopedia
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109 Piscium is a yellow hued G-type main-sequence star located about 108 light-years away in the zodiac constellation of Pisces. It is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.27.[2] The star is moving closer to the Earth with a heliocentric radial velocity of −45.5 km/s.[4] It has one known exoplanet.[10]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Pisces |
Right ascension | 01h 44m 55.8251s[1] |
Declination | +20° 04′ 59.3363″[1] |
Apparent magnitude (V) | 6.27[2] |
Characteristics | |
Spectral type | G3 Va[3] |
B−V color index | 0.720±0.009[2] |
Astrometry | |
Radial velocity (Rv) | −45.53±0.09[4] km/s |
Proper motion (μ) | RA: −42.979±0.069[1] mas/yr Dec.: −104.889±0.068[1] mas/yr |
Parallax (π) | 30.16 ± 0.04 mas[1] |
Distance | 108.1 ± 0.1 ly (33.16 ± 0.04 pc)[1] |
Absolute magnitude (MV) | 3.73[5] |
Details | |
Mass | 1.11±0.03[6] M☉ |
Radius | 1.92±0.05[7] R☉ |
Luminosity | 2.89±0.08[7] L☉ |
Temperature | 5,600±75[8] K |
Metallicity [Fe/H] | 0.15±0.04[4] dex |
Rotation | 32.6±1.6 d[9] |
Rotational velocity (v sin i) | 1.3[5] km/s |
Age | 6.75±0.71[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
With a stellar classification of G3 Va,[3] this is a Sun-like star with a similar mass[6] but a 91%[7] larger radius. (Cowley and Bidelman (1979) had this classified as a subgiant star that is leaving the main sequence.[11]) It is 6.75[6] billion years old with a higher abundance of iron[4] and a low projected rotational velocity of 1.3 km/s.[5] The star is radiating 2.9[7] times the Sun's luminosity from its photosphere at an effective temperature of 5,442 K.[7]