Gliese 806
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 45m 04.09925s |
| Declination | +44° 29′ 56.6451″ |
| Apparent magnitude (V) | +10.79 |
| Characteristics | |
| Spectral type | dM1.5 |
| B−V color index | 1.491±0.005 |
| Astrometry | |
| Radial velocity (Rv) | −24.99±0.15 km/s |
| Proper motion (μ) | RA: 434.028 mas/yr Dec.: 271.022 mas/yr |
| Parallax (π) | 82.8903±0.0167 mas |
| Distance | 39.348 ± 0.008 ly (12.064 ± 0.002 pc) |
| Absolute magnitude (MV) | +10.31 |
| Details | |
| Mass | 0.423±0.010 M☉ |
| Radius | 0.4144±0.0038 R☉ |
| Luminosity | 0.0026±0.0003 L☉ |
| Surface gravity (log g) | 4.89±0.07 cgs |
| Temperature | 3,586±51 K |
| Metallicity [Fe/H] | −0.28±0.07 dex |
| Rotation | 34.6–48.1 d |
| Rotational velocity (v sin i) | 0.46 km/s |
| Age | ~3 Gyr |
| Other designations | |
| NSV 13280, BD+44 3567, GJ 806, HIP 102401, LTT 16068, TOI-4481, TIC 239332587, TYC 3178-00633-1, 2MASS J20450403+4429562 | |
| Database references | |
| SIMBAD | data |
Gliese 806 is a star in the northern constellation of Cygnus, located about a degree to the southeast of the bright star Deneb. It is invisible to the naked eye with an apparent visual magnitude of +10.79. The star is located at a distance of 39.3 light years from the Sun based on stellar parallax. It is drifting closer with a radial velocity of −24.6 km/s, and is predicted to come to within 30.1 light-years in ~198,600 years. The star hosts two known planetary companions.
The stellar classification of Gliese 806 is dM1.5, which indicates this is a small red dwarf star – an M-type main-sequence star that is generating energy through core hydrogen fusion. It is roughly three billion years old and is spinning with a projected rotational velocity of 0.46 km/s. The star has 42% of the mass and radius of the Sun. It is radiating 0.3% of the luminosity of the Sun from its photosphere at an effective temperature of 3,586 K.