WASP-6

WASP-6, also officially named Márohu, is a type-G yellow dwarf star located about 651 light-years (200 parsecs) away in the Aquarius constellation. Dim at magnitude 12, it is visible through a moderate sized amateur telescope. The star is about 80% of the size and mass of the Sun and it is a little cooler.^[4] Starspots in the WASP-6 system helped to refine the measurements of the mass and the radius of the planet WASP-6b.^[7]

WASP-6 / Márohu

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Aquarius[1]
Right ascension	23h 12m 37.73683s[2]
Declination	−22° 40′ 26.2738″[2]
Apparent magnitude (V)	11.9[3]
Characteristics
Evolutionary stage	Main sequence[2]
Spectral type	G8V[3]
Apparent magnitude (B)	~12.9[4]
Apparent magnitude (R)	~11.9[4]
Apparent magnitude (J)	10.769 ±0.026[4]
Apparent magnitude (H)	10.445 ±0.025[4]
Apparent magnitude (K)	10.325 ±0.025[4]
Astrometry
Radial velocity (Rv)	11.84±0.89[2] km/s
Proper motion (μ)	RA: −23.264(15) mas/yr[2] Dec.: −37.143(14) mas/yr[2]
Parallax (π)	5.0073±0.0130 mas[2]
Distance	651 ± 2 ly (199.7 ± 0.5 pc)
Details
Mass	0.880+0.050 −0.080[5] M☉
Radius	0.870+0.025 −0.036[5] R☉
Luminosity	0.60[6] L☉
Temperature	5450±100[5] K
Metallicity [Fe/H]	−0.200±0.090[5] dex
Rotation	23.80±0.15 d[5]
Rotational velocity (v sin i)	1.4±1.0[5] km/s
Age	11.0+3.0 −7.0[5] Gyr
Other designations
Márohu, TOI-231, TIC 204376737, WASP-6, TYC 6972-75-1, 2MASS J23123773-2240261, DENIS J231237.7-224025, UCAC2 22823425[4]
Database references
SIMBAD	data
Exoplanet Archive	data

Nomenclature

The designation WASP-6 indicates that this was the 6th star found to have a planet by the Wide Angle Search for Planets.

In 2019 the IAU announced that WASP-6 and its planet WASP-6b would be given official names chosen by the public from the proposals collected in a national campaign from the Dominican Republic, as part of NameExoWorlds.^[8][9] The star WASP-6 is named Márohu and its planet Boinayel from the proposal received by Marvin del Cid. Márohu, the cemí of drought, is the protector of the Sun.^[10][11]

Planetary system

The SuperWASP project announced that this star has an exoplanet, WASP-6b, in 2008. This object was detected by the astronomical transit method. It is a hot Jupiter with an inflated radius and low density.^[3]

The WASP-6 planetary system^[5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b / Boinayel	0.483+0.026 −0.030 MJ	0.04217+0.00079 −0.0012	3.36100239(37)	<0.070	88.47+0.65 −0.47°	1.224+0.051 −0.052 RJ

See also

• SuperWASP or WASP Planetary Search Program
• List of extrasolar planets