WASP-23

WASP-23 is a K1V-type main sequence star located 671 light-years from Earth in the constellation of Puppis. It has a mass of 0.84 solar masses and a radius of 0.88 solar radii. It is around 6.2 billion years old and has an effective temperature of 5046 Kelvin.^[6]

WASP-23

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Puppis[1]
Right ascension	06h 44m 30.61336s[2]
Declination	−42° 45′ 42.6668″[2]
Apparent magnitude (V)	12.52[3]
Characteristics
Evolutionary stage	main sequence[4]
Spectral type	K1V[4]
Astrometry
Radial velocity (Rv)	+5.29±0.52[2] km/s
Proper motion (μ)	RA: −8.917 mas/yr[2] Dec.: −87.711 mas/yr[2]
Parallax (π)	4.8598±0.0086 mas[2]
Distance	671 ± 1 ly (205.8 ± 0.4 pc)
Details[5]
Mass	0.78+0.13 −0.12 M☉
Radius	0.765+0.033 −0.049 R☉
Surface gravity (log g)	4.4±0.2[4] cgs
Temperature	5,150±100 K
Metallicity [Fe/H]	−0.05±0.13 dex
Rotational velocity (v sin i)	2.2±0.3 km/s
Age	6.2+5.6 −2.5 Gyr
Other designations
TOI-477, TIC 170102285, WASP-23, GSC 07635-01376[3]
Database references
SIMBAD	data
Exoplanet Archive	data

Planetary system

There is only one known exoplanet orbiting this star named WASP-23b that was discovered by the transit method in the year 2010 by Triaud et al. It is a hot Jupiter with similar mass and radius to Jupiter.^[4]

The WASP-23 planetary system^[5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.879+0.095 −0.10 MJ	0.0370+0.0019 −0.0022	2.9444300(11)	<0.065	88.39+0.79 −0.45°	0.962+0.047 −0.056 RJ