WASP-37

WASP-37 is a G-type main-sequence star about 1,240 light-years away in the constellation of Virgo.

WASP-37

Observation data Epoch J2000      Equinox J2000
Constellation	Virgo[1]
Right ascension	14h 47m 46.5620s[2]
Declination	01° 03′ 53.800″[2]
Apparent magnitude (V)	12.704[3]
Characteristics
Evolutionary stage	main sequence[4]
Spectral type	G2V[4]
Astrometry
Radial velocity (Rv)	7.927±0.0042[5] km/s
Proper motion (μ)	RA: −28.214(16) mas/yr[2] Dec.: +18.201(42) mas/yr[2]
Parallax (π)	2.6257±0.0173 mas[2]
Distance	1,242 ± 8 ly (381 ± 3 pc)
Details[6]
Mass	0.926+0.039 −0.034 M☉
Radius	1.071+0.019 −0.018 R☉
Surface gravity (log g)	4.346+0.023 −0.021 cgs
Temperature	5,795+69 −64 K
Metallicity [Fe/H]	−0.098+0.05 −0.06 dex
Rotational velocity (v sin i)	2.4±1.6[7] km/s
Age	10.31+4.01 −2.55[8] Gyr
Other designations
TOI-5674, TIC 368805700, WASP-37, 2MASS J14474655+0103538, DENIS J144746.5+010354[3]
Database references
SIMBAD	data
Exoplanet Archive	data

Star characteristics

WASP-37 has a low metallicity of just 40% of solar,^[4] and is likely older than the Sun.^[7] WASP-37 does not have noticeable flare activity.^[9]

Planetary system

The hot Jupiter class planet WASP-37b was discovered around WASP-37 in 2010.^[4] A study in 2018 found that the stability of orbits in the habitable zone of WASP-37 is not significantly affected by WASP-37b.^[10]

The WASP-37 planetary system^[11]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.72±0.17 MJ	0.0447+0.0018 −0.0020	3.5774807(19)[12]	<0.052	88.82+0.77 −0.86°	1.16+0.07 −0.06 RJ