WASP-10

WASP-10 is a star 461 light-years away in the constellation Pegasus. It hosts a transiting planet discovered by the SuperWASP project.^[3]

WASP-10

Observation data Epoch J2000      Equinox J2000
Constellation	Pegasus[1]
Right ascension	23h 15m 58.3006s[2]
Declination	+31° 27′ 46.296″[2]
Apparent magnitude (V)	12.7[3]
Characteristics
Spectral type	K5V[4]
Apparent magnitude (B)	~12.4[5]
Apparent magnitude (R)	~12.03[5]
Apparent magnitude (J)	10.603 ±0.026[5]
Apparent magnitude (H)	10.117 ±0.029[5]
Apparent magnitude (K)	9.983 ±0.018[5]
Variable type	planetary transit
Astrometry
Radial velocity (Rv)	−12.08±0.65[2] km/s
Proper motion (μ)	RA: 25.050(12) mas/yr[2] Dec.: −25.366(11) mas/yr[2]
Parallax (π)	7.0717±0.0135 mas[2]
Distance	461.2 ± 0.9 ly (141.4 ± 0.3 pc)
Details[6]
Mass	0.752±0.081 M☉
Radius	0.703±0.036 R☉
Temperature	4680±100 K
Metallicity	0.03±0.20
Rotation	11.91±0.05 d
Rotational velocity (v sin i)	3.0±3.0 km/s
Age	7.0+6.0 −3.0 Gyr
Other designations
TOI-5970, TIC 431701493, WASP-10, GSC 02752-00114, 2MASS J23155829+3127462, UCAC2 42862442, GSC2 N0013312406, 1SWASP J231558.30+312746.4, USNO-B1.0 1214-00586164[5]
Database references
SIMBAD	data
Exoplanet Archive	data

The star is likely older than the Sun, has a fraction of heavy elements close to the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit.^[7]

Planetary system

Main article: WASP-10b

WASP-10 hosts one confirmed exoplanet, WASP-10b. It is a hot Jupiter discovered in 2008.^[3]

A candidate second planet with a 5-day period, WASP-10c, was inferred from transit-timing variations of WASP-10b in 2010,^[8] but this was refuted in 2013.^[9] Instead, there may be a super-Jupiter planet or brown dwarf on a wide (at least 5 AU) orbit, based on radial velocity observations.^[10]

The WASP-10 planetary system^[6][10]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	3.21+0.23 −0.24 MJ	0.0378+0.0013 −0.0014	3.09272932(32)	0.0601+0.0064 −0.0046	88.81±0.40°	1.067±0.064 RJ
c (unconfirmed)	4–90 MJ	5–30	—	—	—	—