WASP-55
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 35m 01.9538s |
| Declination | −17° 30′ 12.528″ |
| Apparent magnitude (V) | 11.75 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G1 |
| Astrometry | |
| Radial velocity (Rv) | −3.31±0.87 km/s |
| Proper motion (μ) | RA: +12.037 mas/yr Dec.: −3.747 mas/yr |
| Parallax (π) | 3.4194±0.0204 mas |
| Distance | 954 ± 6 ly (292 ± 2 pc) |
| Details | |
| Mass | 1.16±0.03 M☉ |
| Radius | 1.11±0.01 R☉ |
| Luminosity | 1.48 L☉ |
| Surface gravity (log g) | 4.413±0.006 cgs |
| Temperature | 6,070+51 −46 K |
| Metallicity [Fe/H] | 0.09±0.05 dex |
| Rotational velocity (v sin i) | 3.1±1.0 km/s |
| Age | 1.1+0.8 −0.6 Gyr |
| Other designations | |
| EPIC 212300977, TOI-774, TIC 294301883, WASP-55, TYC 6125-113-1, 2MASS J13350194-1730124 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
WASP-55 is a G-type main-sequence star about 954 light-years away in the constellation Virgo. The star is much younger than the Sun at approximately 1.1+0.8
−0.6 billion years. WASP-55 is similar to the Sun in concentration of heavy elements.
A multiplicity survey in 2016 found one candidate stellar companion to WASP-55 at a projected separation of 4.435″±0.018″. Follow-up observations in 2017 were unable to confirm if the suspected companion red dwarf star, with a temperature of 3,340±90 K, is gravitationally bound to WASP-55 or not. It was confirmed in 2019 using Gaia DR2 data.