WASP-61

WASP-61 is a single F-type main-sequence star about 1560 light-years away. The star is likely younger than the Sun at approximately 3.8^+1.8
_−0.9 billion years. WASP-61 is depleted in heavy elements, having just 40% of the solar abundance of iron.^[3]

WASP-61

Observation data Epoch J2000      Equinox J2000
Constellation	Lepus
Right ascension	05h 01m 11.9187s[1]
Declination	−26° 03′ 14.9668″[1]
Apparent magnitude (V)	12.49
Characteristics
Evolutionary stage	Main sequence
Spectral type	F7V
Astrometry
Radial velocity (Rv)	18.66[1] km/s
Proper motion (μ)	RA: 0.495[1] mas/yr Dec.: 3.169[1] mas/yr
Parallax (π)	2.0176±0.0228 mas[1]
Distance	1,620 ± 20 ly (496 ± 6 pc)
Details[2]
Mass	1.22±0.07 M☉
Radius	1.36±0.03 R☉
Surface gravity (log g)	4.21±0.21[3] cgs
Temperature	6265±168[3] K
Metallicity [Fe/H]	-0.38±0.11[3] dex
Rotational velocity (v sin i)	10.3±0.5 km/s
Age	3.8+1.8 −0.9 Gyr
Other designations
Gaia DR2 2959177048983750016, TYC 6469-1972-1, 2MASS J05011191-2603149[4]
Database references
SIMBAD	data

Planetary system

In 2012 a transiting superjovian planet b was detected on a tight, circular orbit.^[5] Its equilibrium temperature is 1565±35 K.^[5]

The planetary orbit is well aligned with the equatorial plane of the star, misalignment equal to 4.0^+17.1
_−18.4°.^[6]

The WASP-61 planetary system^[2]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	2.05+0.18 −0.17 MJ	0.05146+0.00097 −0.00099	3.8559000±0.000003	<0.074	89.35+0.45 −0.66[5]°	1.41±0.22[7] RJ