HD 191806
HD 191806 is a star located in the northern constellation Cygnus. With an apparent magnitude of 8.093, it's undetectable with the naked eye, but can be seen with binoculars. HD 191806 is currently placed at a distance of 215 light years based on parallax measurements and is drifting towards the Solar System with a spectroscopic radial velocity of −15.28 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 20h 09m 28.30936s |
| Declination | +52° 16′ 34.8000″ |
| Apparent magnitude (V) | 8.08±0.01 |
| Characteristics | |
| Spectral type | rG0V |
| B−V color index | +0.63 |
| Astrometry | |
| Radial velocity (Rv) | −15.33±0.13 km/s |
| Proper motion (μ) | RA: 114.022±0.022 mas/yr Dec.: 91.296±0.022 mas/yr |
| Parallax (π) | 15.1975 ± 0.0182 mas |
| Distance | 214.6 ± 0.3 ly (65.80 ± 0.08 pc) |
| Absolute magnitude (MV) | +3.89 |
| Details | |
| Mass | 1.1±0.1 M☉ |
| Radius | 1.48+0.14 −0.13 R☉ |
| Luminosity | 2.23±0.16 L☉ |
| Surface gravity (log g) | 4.15±0.15 cgs |
| Temperature | 5,894+155 −86 K |
| Metallicity [Fe/H] | +0.30±0.02 dex |
| Rotation | 20.6±6.9 d |
| Rotational velocity (v sin i) | 3.3 km/s |
| Age | 2.9±0.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 191806 has a stellar classification of G0V, indicating that it is a G-type main sequence star. It has 110% the mass of the Sun and a slightly enlarged radius of 1.48 R☉. It radiates at 2.23 times the luminosity of the Sun from its photosphere at an effective temperature of 5,894 K, giving a yellow hue. HD 191806 is estimated to be about 3 billion years old and has a metallicity nearly twice of the Sun's. It spins with a projected rotational velocity of 3.3 km/s, which corresponds to a rotational period of 21 days.