Gliese 268
A blue light light curve of a flare on Gliese 268. The intensity scale is relative to the star's quiescent brightness. Adapted from Pettersen (1975) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 07h 10m 01.83358s |
| Declination | +38° 31′ 46.0865″ |
| Apparent magnitude (V) | 11.52 |
| Characteristics | |
| Spectral type | M4.5Ve |
| U−B color index | +1.18 |
| B−V color index | +1.71 |
| Variable type | Flare star |
| Astrometry | |
| Radial velocity (Rv) | +41.792±0.025 km/s |
| Proper motion (μ) | RA: −439.420 mas/yr Dec.: −944.793 mas/yr |
| Parallax (π) | 165.2147±0.0636 mas |
| Distance | 19.741 ± 0.008 ly (6.053 ± 0.002 pc) |
| Absolute magnitude (MV) | +12.48 |
| Orbit | |
| Period (P) | 10.42672±0.00006 d |
| Semi-major axis (a) | 0.01110±0.0005″ |
| Eccentricity (e) | 0.3203±0.0009 |
| Inclination (i) | 100.39±0.03° |
| Longitude of the node (Ω) | 89.98±0.07° |
| Argument of periastron (ω) (secondary) | 211.98±0.19° |
| Semi-amplitude (K1) (primary) | 34.814±0.036 km/s |
| Semi-amplitude (K2) (secondary) | 40.874±0.052 km/s |
| Details | |
| Gliese 268 A | |
| Mass | 0.22599±0.00065 M☉ |
| Radius | 0.242 R☉ |
| Luminosity | 0.00572 L☉ |
| Temperature | 3,192 K |
| Metallicity [Fe/H] | 0.056 dex |
| Gliese 268 B | |
| Mass | 0.19248±0.00056 M☉ |
| Radius | 0.218 R☉ |
| Luminosity | 0.00427 L☉ |
| Temperature | 3,192 K |
| Metallicity [Fe/H] | 0.056 dex |
| Other designations | |
| QY Aur, GJ 268, HIP 34603, G 87-26, G 07-51, LFT 512, LHS 226, LTT 11987, Ross 986, TYC 2944-1956-1 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Location of Gliese 268 in the constellation Auriga | |
Gliese 268 (QY Aurigae) is a binary star system in the constellation of Auriga, and is one of the one hundred closest star systems to the Earth.
Gliese 268 is composed of two M-type dwarfs, or red dwarfs. The primary component of the system is calculated to have an apparent magnitude of 11.95, and the secondary component an apparent magnitude of 12.45.
In 1975, Bjørn Ragnvald Pettersen discovered that Gliese 268 is a flare star. It received its variable star designation, QY Aurigae, in 1977.