WASP-25

WASP-25 is a G-type main-sequence star about 701 light-years away in the constellation of Hydra.

WASP-25

Observation data Epoch J2000      Equinox J2000
Constellation	Hydra[1]
Right ascension	13h 01m 26.3760s[2]
Declination	−27° 31′ 19.922″[2]
Apparent magnitude (V)	11.87[3]
Characteristics
Evolutionary stage	main sequence[2]
Spectral type	G4[4]
B−V color index	0.45[citation needed]
J−H color index	0.328[citation needed]
J−K color index	0.422[citation needed]
Astrometry
Radial velocity (Rv)	−2.698±0.0028[5] km/s
Proper motion (μ)	RA: −29.264[2] mas/yr Dec.: −6.196[2] mas/yr
Parallax (π)	4.6501±0.0230 mas[2]
Distance	701 ± 3 ly (215 ± 1 pc)
Details[6]
Mass	1.053±0.038 M☉
Radius	0.924±0.018 R☉
Luminosity	0.89[7] L☉
Surface gravity (log g)	4.530±0.015 cgs
Temperature	5,736±50 K
Metallicity [Fe/H]	0.06±0.05 dex
Rotational velocity (v sin i)	2.9±0.3[8] km/s
Age	0.10+5.70 −0.10 Gyr
Other designations
TOI-767, TIC 229047362, WASP-25, TYC 6706-861-1, 2MASS J13012637-2731199, DENIS J130126.3-273120[9]
Database references
SIMBAD	data
Exoplanet Archive	data

Star characteristics

WASP-25 is slightly metal-poor (85% of Solar amount) and is probably a young star which has just entered the main sequence.^[4]

Planetary system

The hot Jupiter class planet WASP-25b was discovered around WASP-25 in 2010.^[4] The planet would have an equilibrium temperature of 1212±35 K. A Rossiter-McLaughlin effect based study in 2011 found a modest misalignment of the planetary orbit to the rotational axis of the parent star, equal to 14.6±6.7 degrees.^[8] A habitability study in 2018 found WASP-25b does not adversely affect the stability of planetary orbits in the habitable zone of WASP-25.^[10]

The WASP-25 planetary system^[11]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.574±0.042 MJ	0.04738±0.00047	3.7648327(9)	<0.083	88.12±0.27[6]°	1.247±0.032[6] RJ