Luyten's Star
Location of Luyten's Star in the constellation Canis Minor | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Minor |
| Right ascension | 07h 27m 24.49897s |
| Declination | +05° 13′ 32.8415″ |
| Apparent magnitude (V) | 9.872 |
| Characteristics | |
| Spectral type | M3.5V |
| U−B color index | 1.115 |
| B−V color index | 1.571 |
| Astrometry | |
| Radial velocity (Rv) | 17.35±0.19 km/s |
| Proper motion (μ) | RA: 571.232 mas/yr Dec.: −3,691.487 mas/yr |
| Parallax (π) | 264.1269±0.0413 mas |
| Distance | 12.348 ± 0.002 ly (3.7861 ± 0.0006 pc) |
| Absolute magnitude (MV) | 11.94 |
| Details | |
| Mass | 0.29 M☉ |
| Radius | 0.293±0.027 R☉ |
| Luminosity | 0.0088 L☉ |
| Surface gravity (log g) | 5 cgs |
| Temperature | 3,382±49 K |
| Metallicity [Fe/H] | 0.09±0.17 dex |
| Rotation | 115.6±19.4 d, ~99 d |
| Age | ≳8 Gyr |
| Other designations | |
| Luyten's Star, BD+05 1668, GJ 273, HIP 36208, G 112-17, G 89-19, LFT 527, LHS 33, LTT 12021, NLTT 17881, PLX 1755, TYC 173-3208-1, GCRV 4954, MCC 17 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Luyten's Star /ˈlaɪtənz/ (GJ 273) is a red dwarf in the constellation Canis Minor located at a distance of 12.35 light-years (3.79 parsecs) from the Sun. It has a visual magnitude of 9.9, making it too faint to be viewed with the unaided eye. It is named after Willem Jacob Luyten, who, in collaboration with Edwin G. Ebbighausen, first determined its high proper motion in 1935. The star has two confirmed planets and two candidate planets, of which Luyten b is in the circumstellar habitable zone.