WASP-80
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 12m 40.1694s |
| Declination | −02° 08′ 39.187″ |
| Apparent magnitude (V) | 11.939 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K7V – M9V |
| Astrometry | |
| Radial velocity (Rv) | +9.82±0.77 km/s |
| Proper motion (μ) | RA: −132.913 mas/yr Dec.: −50.683 mas/yr |
| Parallax (π) | 20.1141±0.0207 mas |
| Distance | 162.2 ± 0.2 ly (49.72 ± 0.05 pc) |
| Details | |
| Mass | 0.614+0.014 −0.012 M☉ |
| Radius | 0.586+0.017 −0.018 R☉ |
| Luminosity | 0.093 L☉ |
| Surface gravity (log g) | 4.60±0.02 cgs |
| Temperature | 4,066±22 K |
| Metallicity [Fe/H] | 0.13±0.11 dex |
| Rotation | 23.5±3 |
| Rotational velocity (v sin i) | 5.04±0.19 km/s |
| Age | 1.352±0.222 Gyr |
| Other designations | |
| Petra, Gaia DR2 4223507222112425344, TYC 5165-481-1, GSC 05165-00481, 2MASS J20124017-0208391 | |
| Database references | |
| SIMBAD | data |
WASP-80 is a K-type main-sequence star about 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years. WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain.
The star was named Petra in 2019 by Jordanian amateur astronomers as part of the NameExoWorlds contest.
Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉ companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%.