Gliese 1
Location of Gliese 1 in the constellation Sculptor | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 05m 24.42844s |
| Declination | −37° 21′ 26.5079″ |
| Apparent magnitude (V) | 8.57 |
| Characteristics | |
| Spectral type | M2V |
| U−B color index | +1.04 |
| B−V color index | +1.46 |
| Variable type | BY Dra |
| Astrometry | |
| Radial velocity (Rv) | +25.13±0.14 km/s |
| Proper motion (μ) | RA: +5,633.438 mas/yr Dec.: −2,334.721 mas/yr |
| Parallax (π) | 230.0970±0.0362 mas |
| Distance | 14.175 ± 0.002 ly (4.3460 ± 0.0007 pc) |
| Absolute magnitude (MV) | 10.35 |
| Details | |
| Mass | 0.33±0.07 M☉ |
| Radius | 0.379±0.002 R☉ |
| Luminosity | 0.015+0.007 −0.005 L☉ |
| Surface gravity (log g) | 4.91 cgs |
| Temperature | 3,616±14 K |
| Metallicity [Fe/H] | −0.26±0.09 dex |
| Rotation | 60.1±5.7 d |
| Rotational velocity (v sin i) | 4.8 km/s |
| Age | 8.27 Gyr |
| Other designations | |
| CD−37°15492, CPD−37°9435, G 267-025, GJ 1, GC 49, GCTP 5817.00, HD 225213, HIP 439, LHS 1, LTT 23, NLTT 134, NSV 15017, SAO 192348 | |
| Database references | |
| SIMBAD | data |
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.