 A blue lightlight curve of a flare on Gliese 269. The intensity scale is relative to the star's quiescent brightness. Adapted from Pettersen (1975)[1] | |
| Observation data EpochJ2000 EquinoxJ2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 07h 10m 01.83458s[2] |
| Declination | 38° 31′ 46.0672″[2] |
| Characteristics | |
| Spectral type | M5Ve + M5Ve[3] |
| U−Bcolor index | +1.18[4] |
| B−Vcolor index | +1.71[4] |
| Variable type | RS CVn |
| Astrometry | |
| Radial velocity (Rv) | 41.792 ± 0.025[5] km/s |
| Proper motion (μ) | RA: -437.44[2]mas/yr Dec.: -947.44[2]mas/yr |
| Parallax (π) | 165.2147±0.0636 mas[6] |
| Distance | 19.741 ± 0.008 ly (6.053 ± 0.002 pc) |
| Orbit[5] | |
| Period (P) | 10.42672 ± 0.00006 d |
| Semi-major axis (a) | 0.1110 ± 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[5] | |
| Gliese 268 A | |
| Mass | 0.22599(65) M☉ |
| Gliese 268 B | |
| Mass | 0.19248(56) M☉ |
| 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[3] | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
  Gliese 268 Location of Gliese 268 in the constellationAuriga | |
Gliese 268 (QY Aurigae) is aRS Canum Venaticorum variable (RS CVn) star in theAuriga constellation. RS CVn variables arebinary star systems with a strong magnetic field influenced by each star's rotation, which is accelerated by the tidal effects of the other star in the system.[7] Gliese 268 in particular is composed of a binary system of twoM-type dwarfs, orred dwarfs, and is one of the one hundred closest star systems to the Earth. The primary component of the system has anapparent magnitude of 12.05, and the secondary component an apparent magnitude of 12.45.[citation needed] Neither is visible to thenaked eye from Earth.[8]
In 1975, Bjørn Ragnvald Pettersen discovered that Gliese 268 is aflare star.[1] It received itsvariable star designation, QY Aurigae, in 1977.[9]
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