WASP-62

WASP-62, formally named Naledi, is a single star about 573 light-years (176 parsecs) away in the constellation Dorado. It is an F class main-sequence star, orbited by a planet, WASP-62b. The age of WASP-62 is much younger than the Sun at 0.8±0.6 billion years,^[6] and it has a metal abundance similar to the Sun.

WASP-62 / Naledi

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Dorado[1]
Right ascension	05h 48m 33.59333s[2]
Declination	−63° 59′ 18.3884″[2]
Apparent magnitude (V)	10.21[3]
Characteristics
Evolutionary stage	main-sequence star[2]
Spectral type	F7[4]
Apparent magnitude (B)	10.73[3]
Apparent magnitude (G)	10.077±0.003[2]
Apparent magnitude (R)	9.93[3]
Astrometry
Radial velocity (Rv)	15.24±0.25[2] km/s
Proper motion (μ)	RA: -15.439 mas/yr[2] Dec.: 26.151 mas/yr[2]
Parallax (π)	5.6910±0.0113 mas[2]
Distance	573 ± 1 ly (175.7 ± 0.3 pc)
Details[5]
Mass	1.250±0.050 M☉
Radius	1.280±0.050 R☉
Surface gravity (log g)	4.45±0.1 cgs
Temperature	6230±80 K
Metallicity [Fe/H]	0.040±0.060 dex
Rotational velocity (v sin i)	8.70±0.40 km/s
Age	2.60+0.50 −0.70 Gyr
Other designations
Naledi, CPD−64 484, TOI-102, TIC 149603524, WASP-62, TYC 8900-874-1, GSC 08900-00874, 2MASS J05483359-6359183[3]
Database references
SIMBAD	data
Exoplanet Archive	data

Nomenclature

The designation WASP-62 indicates that this was the 62nd star found to have a planet by the Wide Angle Search for Planets.

This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to South Africa. The approved names were announced in December 2019. The star is named Naledi, which means star in several languages of South Africa, and the planet is named Krotoa after a Khoi translator during colonial times.^[7][8]

Planetary system

WASP-62b (artist's impression) compared to Jupiter

A transiting hot Jupiter exoplanet orbiting WASP-62 was discovered in 2012 by WASP-South^[4] at the South African Astronomical Observatory.^[9] The planet's equilibrium temperature is 1440±30 K, but the measured average temperature is colder at 1329.6±44.8 K.^[10] In 2020, a transmission spectrum indicated the atmosphere of WASP-62b is free of clouds. It contains sodium and possibly silicon hydrides.^[11]

The planetary orbit is slightly misaligned to the equatorial plane of the star, with the misalignment angle equal to 19.4^+5.1
_−4.9°.^[6]

The WASP-62 planetary system^[10]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b / Krotoa	0.562±0.042 MJ	0.05672+0.00075 −0.00079[5]	4.4119530(30)	<0.075[5]	88.30+0.90 −0.60°	1.390±0.060 RJ