WASP-18
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 01h 37m 25.03328s |
| Declination | −45° 40′ 40.3747″ |
| Apparent magnitude (V) | 9.273 |
| Characteristics | |
| Spectral type | F6IV/V + M6.5V |
| Astrometry | |
| Radial velocity (Rv) | 3.47±0.34 km/s |
| Proper motion (μ) | RA: 25.404(10) mas/yr Dec.: 20.479(11) mas/yr |
| Parallax (π) | 8.1443±0.0116 mas |
| Distance | 400.5 ± 0.6 ly (122.8 ± 0.2 pc) |
| Details | |
| Mass | 1.294+0.063 −0.061 M☉ |
| Radius | 1.319+0.061 −0.062 R☉ |
| Luminosity | 2.68+0.28 −0.26 L☉ |
| Surface gravity (log g) | 4.310+0.036 −0.033 cgs |
| Temperature | 6432±48 K |
| Metallicity [Fe/H] | 0.107±0.080 dex |
| Rotational velocity (v sin i) | 11.9±1.2 km/s |
| Age | 1.57+1.4 −0.94 Gyr |
| Other designations | |
| CD−46 449, CPD−46 168, HD 10069, HIP 7562, SAO 215585, PPM 306061, TOI-185, TIC 100100827, WASP-18, TYC 8040-72-1, 2MASS J01372503-4540404 | |
| Database references | |
| SIMBAD | A |
| B | |
| Exoplanet Archive | data |
WASP-18 is a magnitude 9 star located 400 light-years (120 parsecs) away in the Phoenix constellation of the southern hemisphere. It has a mass of 1.29 solar masses.
The star, although similar to the Sun in terms of overall contents of heavy elements, is depleted in carbon. The carbon to oxygen molar ratio of 0.23±0.05 for WASP-18 is well below the solar ratio of 0.55.
There is a red dwarf companion star at a separation of 3,519 AU.