HD 191939
HD 191939 is a single yellow (G-type) main-sequence star, located approximately 174 light-years away in the constellation of Draco, taking its primary name from its Henry Draper Catalogue designation.
Location of HD 191939 in the night sky. The star is marked within the red diamond. | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| 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) | 5.32 |
| 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 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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