Gliese 1
Red dwarf star in the constellation of Sculptor / From Wikipedia, the free encyclopedia
Gliese 1 is a red dwarf in the constellation Sculptor, which is found in the southern celestial hemisphere. It is one of the closest stars to the Sun, at a distance of 14.2 light years. Because of its proximity to the Earth it is a frequent object of study and much is known about its physical properties and composition. However, with an apparent magnitude of about 8.6 it is too faint to be seen with the naked eye.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Sculptor |
Right ascension | 00h 05m 24.4279s[1] |
Declination | −37° 21′ 26.503″[1] |
Apparent magnitude (V) | 8.57[2] |
Characteristics | |
Spectral type | M2V[3] |
U−B color index | +1.04[4] |
B−V color index | +1.46[4] |
Variable type | BY Dra[5] |
Astrometry | |
Radial velocity (Rv) | +23.6±2[6] km/s |
Proper motion (μ) | RA: +5,633.95[1] mas/yr Dec.: −2,336.69[1] mas/yr |
Parallax (π) | 230.0970 ± 0.0362 mas[7] |
Distance | 14.175 ± 0.002 ly (4.3460 ± 0.0007 pc) |
Absolute magnitude (MV) | 10.35[8] |
Details | |
Mass | 0.33±0.07[9] M☉ |
Radius | 0.33±0.06[9] R☉ |
Luminosity | 0.015+0.007 −0.005[9] L☉ |
Surface gravity (log g) | 4.91[9] cgs |
Temperature | 3,478±68[9] K |
Metallicity [Fe/H] | −0.26±0.09[9] dex |
Rotation | 60.1±5.7 d[10] |
Rotational velocity (v sin i) | 4.8[11] km/s |
Age | 8.27[9] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Location of Gliese 1 in the constellation Sculptor |
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