Gliese 86
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Eridanus |
| Gliese 86 A | |
| Right ascension | 02h 10m 25.9182s |
| Declination | −50° 49′ 25.465″ |
| Apparent magnitude (V) | 6.17 |
| Gliese 86 B | |
| Right ascension | 02h 10m 26.1144s |
| Declination | −50° 49′ 26.334″ |
| Apparent magnitude (V) | 14.0 |
| Characteristics | |
| A | |
| Evolutionary stage | main sequence |
| Spectral type | K1V |
| U−B color index | 0.44 |
| B−V color index | 0.82 |
| B | |
| Evolutionary stage | white dwarf |
| Spectral type | DQ6 |
| Astrometry | |
| A | |
| Radial velocity (Rv) | +55.22±0.15 km/s |
| Proper motion (μ) | RA: +2,125.416 mas/yr Dec.: +637.975 mas/yr |
| Parallax (π) | 92.9251±0.0461 mas |
| Distance | 35.10 ± 0.02 ly (10.761 ± 0.005 pc) |
| Absolute magnitude (MV) | 5.95 |
| Orbit | |
| Primary | Gliese 86 A |
| Name | Gliese 86 B |
| Period (P) | ≈100 yr |
| Semi-major axis (a) | 23.7 au |
| Eccentricity (e) | 0.429 |
| Inclination (i) | 126.44° |
| Longitude of the node (Ω) | 234.2° |
| Details | |
| Gliese 86 A | |
| Mass | 0.83±0.05 M☉ |
| Radius | 0.79±0.03 R☉ |
| Luminosity | 0.41 L☉ |
| Surface gravity (log g) | 4.56±0.10 cgs |
| Temperature | 5,180±80 K |
| Metallicity [Fe/H] | −0.27±0.07 dex |
| Rotation | 30.0 days |
| Rotational velocity (v sin i) | 2.0±1.0 km/s |
| Age | 10±1 Gyr |
| Gliese 86 B | |
| Mass | 0.5425 M☉ |
| Surface gravity (log g) | 8.00 cgs |
| Temperature | 5,000±500 K |
| Other designations | |
| GJ 86, WDS J02104-5049 | |
| Gliese 86A: CD−51°532, HD 13445, HIP 10138, HR 637, SAO 232658 | |
| Gliese 86B: WD 0208-510 | |
| Database references | |
| SIMBAD | data |
| B | |
| Exoplanet Archive | data |
| ARICNS | data |
Gliese 86 (13 G. Eridani, HD 13445) is a K-type main-sequence star 35 light-years away in the constellation of Eridanus. It has been confirmed that a white dwarf orbits the primary star. In 1998 the European Southern Observatory announced that an extrasolar planet was also orbiting the star.