![]() 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) [1] | |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga [2] |
Right ascension | 07h 10m 01.83358s [3] |
Declination | +38° 31′ 46.0865″ [3] |
Apparent magnitude (V) | 11.52 [4] |
Characteristics | |
Spectral type | M4.5Ve [5] |
U−B color index | +1.18 [6] |
B−V color index | +1.71 [6] |
Variable type | Flare star [7] |
Astrometry | |
Radial velocity (Rv) | +41.792±0.025 [8] km/s |
Proper motion (μ) | RA: −439.420 [3] mas/yr Dec.: −944.793 [3] mas/yr |
Parallax (π) | 165.2147±0.0636 mas [3] |
Distance | 19.741 ± 0.008 ly (6.053 ± 0.002 pc) |
Absolute magnitude (MV) | +12.48 [9] |
Orbit [8] | |
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 [8] M☉ |
Radius | 0.242 [10] R☉ |
Luminosity | 0.00572 [10] L☉ |
Temperature | 3,192 [9] K |
Metallicity [Fe/H] | 0.056 [9] dex |
Gliese 268 B | |
Mass | 0.19248±0.00056 [8] M☉ |
Radius | 0.218 [10] R☉ |
Luminosity | 0.00427 [10] L☉ |
Temperature | 3,192 [9] K |
Metallicity [Fe/H] | 0.056 [9] 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 [11] | |
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. [10]
In 1975, Bjørn Ragnvald Pettersen discovered that Gliese 268 is a flare star. [1] It received its variable star designation, QY Aurigae, in 1977. [12]