WASP-50
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 02h 54m 45.1342s |
| Declination | −10° 53′ 53.025″ |
| Apparent magnitude (V) | 11.44 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G9V |
| Astrometry | |
| Radial velocity (Rv) | 25.76±0.69 km/s |
| Proper motion (μ) | RA: 3.383(20) mas/yr Dec.: 8.913(17) mas/yr |
| Parallax (π) | 5.4865±0.0174 mas |
| Distance | 594 ± 2 ly (182.3 ± 0.6 pc) |
| Details | |
| Mass | 0.892+0.08 −0.074 M☉ |
| Radius | 0.843±0.031 R☉ |
| Luminosity | 0.6 L☉ |
| Surface gravity (log g) | 4.5±0.1 cgs |
| Temperature | 5,400±100 K |
| Metallicity | −0.12±0.08 |
| Rotation | 16.30±0.50 d |
| Rotational velocity (v sin i) | 2.6±0.5 km/s |
| Age | 8.57±2.86 Gyr |
| Other designations | |
| Chaophraya, TOI-391, TIC 382391899, WASP-50, TYC 5290-462-1, GSC 05290-00462, 2MASS J02544513-1053530 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-50 is a G-type main-sequence star about 594 light-years away. The star is older than the Sun and slightly depleted in heavy elements compared to the Sun, and has a close to average starspot activity. Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on a close orbit.
The star was named Chaophraya in December 2019 by Thai amateur astronomers through NameExoWorlds.