HD 191939
Location of HD 191939 in the night sky. The star is marked within the red diamond. | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 20h 08m 05.75515s |
| Declination | +66° 51′ 02.0766″ |
| Apparent magnitude (V) | 8.971 |
| Characteristics | |
| HD 191939 | |
| Evolutionary stage | main sequence |
| Spectral type | G9V |
| Astrometry | |
| Radial velocity (Rv) | −9.23±0.16 km/s |
| Proper motion (μ) | RA: 150.194±0.015 mas/yr Dec.: −63.988±0.017 mas/yr |
| Parallax (π) | 18.6967±0.0133 mas |
| Distance | 174.4 ± 0.1 ly (53.49 ± 0.04 pc) |
| Absolute magnitude (MV) | +5.17 |
| Details | |
| HD 191939 | |
| Mass | 0.81±0.04 M☉ |
| Radius | 0.94±0.02 R☉ |
| Luminosity (bolometric) | 0.65±0.02 L☉ |
| Surface gravity (log g) | 4.3±0.1 cgs |
| Temperature | 5348±100 K |
| Metallicity [Fe/H] | −0.15±0.06 dex |
| Rotational velocity (v sin i) | 0.6±0.5 km/s |
| Age | 7±3 Gyr |
| Other designations | |
| HD 191939, HIP 99175, TOI-1339, TIC 269701147, TYC 4244-964-1, 2MASS J20080574+6651019, Gaia DR2 2248126315275354496 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 191939 is a single yellow (G-type) main-sequence star, located approximately 174 light-years away in the northern constellation of Draco, taking its primary name from its Henry Draper Catalogue designation.