WASP-67

WASP-67 is a K-type main-sequence star about 620 light-years away in the constellation Sagittarius. The star's age is poorly constrained.^[8] WASP-67 is slightly depleted in heavy elements, having 85% of the solar abundance of iron.^[5]

WASP-67

Observation data Epoch J2000      Equinox J2000
Constellation	Sagittarius[1]
Right ascension	19h 42m 58.5218s[2]
Declination	−19° 56′ 58.521″[2]
Apparent magnitude (V)	12.54[3]
Characteristics
Evolutionary stage	Main sequence[2]
Spectral type	K0V[4]
Astrometry
Radial velocity (Rv)	−0.76±0.80[2] km/s
Proper motion (μ)	RA: +1.647[2] mas/yr[2] Dec.: −33.032[2] mas/yr[2]
Parallax (π)	5.2720±0.0123 mas[2]
Distance	619 ± 1 ly (189.7 ± 0.4 pc)
Details
Mass	0.91±0.28[5] M☉
Radius	0.88±0.08[5] R☉
Luminosity	0.51[6] L☉
Surface gravity (log g)	4.35±0.15[5] cgs
Temperature	5200±100[5] K
Metallicity [Fe/H]	−0.07[5] dex
Rotational velocity (v sin i)	2.1±0.4[7] km/s
Age	4.3±3.1[8] Gyr
Other designations
WASP-67, TYC 6307-1388-1, 2MASS J19425852-1956585[3]
Database references
SIMBAD	data
Exoplanet Archive	data

A multiplicity survey in 2016 found one candidate stellar companion to WASP-67 at a projected separation of 4.422″±0.018″.^[9] Nonetheless, follow-up observations in 2017 failed to find any bound stellar companions.^[10]

Planetary system

In 2012 a transiting hot Jupiter planet, WASP-67b, was detected on a tight, circular orbit.^[7] Its equilibrium temperature is 1050 K.^[11]

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.^[11]

The WASP-67 planetary system^[5]

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[4]	4.61442±0.00001	0[12]	85.8±0.35°	1.15±0.11 RJ