Gliese 676
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| A | |
| Right ascension | 17h 30m 11.20s |
| Declination | −51° 38′ 13.1″ |
| Apparent magnitude (V) | 9.59 |
| B | |
| Right ascension | 17h 30m 16.24s |
| Declination | −51° 38′ 22.6″ |
| Apparent magnitude (V) | 13.37 |
| Characteristics | |
| A | |
| Evolutionary stage | main sequence |
| Spectral type | M0V |
| B | |
| Evolutionary stage | main sequence |
| Spectral type | M3V |
| Astrometry | |
| A | |
| Radial velocity (Rv) | −39.82±0.14 km/s |
| Proper motion (μ) | RA: −258.759±0.034 mas/yr Dec.: −185.119±0.025 mas/yr |
| Parallax (π) | 62.5786±0.0303 mas |
| Distance | 52.12 ± 0.03 ly (15.980 ± 0.008 pc) |
| Absolute magnitude (MV) | 8.50 |
| B | |
| Radial velocity (Rv) | −39.61±0.34 km/s |
| Proper motion (μ) | RA: −269.069±0.024 mas/yr Dec.: −185.004±0.018 mas/yr |
| Parallax (π) | 62.5776 ± 0.0225 mas |
| Distance | 52.12 ± 0.02 ly (15.980 ± 0.006 pc) |
| Details | |
| A | |
| Mass | 0.631±0.017 M☉ |
| Radius | 0.617+0.028 −0.027 R☉ |
| Luminosity | 0.08892±0.00220 L☉ |
| Surface gravity (log g) | 4.611±0.012 cgs |
| Temperature | 4,014+94 −90 K |
| Metallicity [Fe/H] | 0.23±0.10 dex |
| Rotation | 41.2±3.8 d |
| B | |
| Mass | 0.29 M☉ |
| Radius | 0.617+0.028 −0.027 R☉ |
| Luminosity | 0.00093±0.0024 L☉ |
| Surface gravity (log g) | 4.914±0.004 cgs |
| Temperature | 3,217±157 K |
| Other designations | |
| NSV 8846, CD−51°10924, HIP 85647, LTT 6947/6948, NLTT 44859 | |
| A: NSV 8846, HIP 85647, LTT 6947, NLTT 44859 | |
| B: LTT 6948, NLTT 44860 | |
| Database references | |
| SIMBAD | A |
| B | |
| Exoplanet Archive | data |
Gliese 676 is a 10th-magnitude wide binary system of red dwarfs that has an estimated minimum separation of 800 AU with an orbital period of greater than 20,000 years. It is located approximately 54 light years away in the constellation Ara. In 2009, a gas giant was found in orbit around the primary star, in addition to its confirmation in 2011 there was also a strong indication of a companion; the second gas giant was characterised in 2012, along with two much smaller planets.