WASP-67 is a K-type main-sequence star about 620 light-years away. The stars age is poorly constrained, but is likely older than the Sun`s at approximately 8.7+5.5
−8.6 billion years (ie. somewhere between 100 million years and the age of the universe).[2] WASP-67 is slightly depleted in heavy elements, having 85% of the solar abundance of iron.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 42m 58.5217s[1] |
| Declination | −19° 56′ 58.523″[1] |
| Apparent magnitude (V) | 12.54 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K0V[2] |
| Astrometry | |
| Radial velocity (Rv) | 0.29[1] km/s |
| Proper motion (μ) | RA: 1.759[1] mas/yr Dec.: −32.902[1] mas/yr |
| Parallax (π) | 5.2496 ± 0.0427 mas[1] |
| Distance | 621 ± 5 ly (190 ± 2 pc) |
| Details[3] | |
| Mass | 0.91±0.28 M☉ |
| Radius | 0.88±0.08 R☉ |
| Surface gravity (log g) | 4.35±0.15 cgs |
| Temperature | 5200±100 K |
| Metallicity [Fe/H] | −0.07 dex |
| Rotational velocity (v sin i) | 2.1±0.4[4] km/s |
| Age | 8.7+5.5 −8.6[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
A multiplicity survey in 2016 has found one candidate stellar companion to WASP-67 at a projected separation of 4.422″±0.018″.[6] Nonetheless, follow-up observations in 2017 failed to find any bound stellar companions.[7]
Planetary system
In 2012 a transiting hot Jupiter planet b was detected on a tight, circular orbit.[4] Its equilibrium temperature is 1050 K.[8]
The planetary atmosphere contains water, and a cloud layer is located higher than in the similar gas giant HAT-P-38b, indicating a high planetary metallicity.[8]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.43±0.09 MJ | 0.0510+0.001 −0.0008[2] | 4.61442±0.00001 | 0[9] | 85.8±0.35° | 1.15±0.11 RJ |