WASP-67

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]

WASP-67

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
Gaia DR2 6868476691490044672, WASP-67, TYC 6307-1388-1, 2MASS J19425852-1956585[5]
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]

The WASP-67 planetary system^[3]

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