WASP-25

WASP-25 is a yellow main sequence star in the constellation of Hydra.

WASP-25

Observation data Epoch J2000      Equinox
Constellation	Hydra
Right ascension	13h 01m 26.3760s[1]
Declination	−27° 31′ 19.9208″[1]
Apparent magnitude (V)	11.87[2]
Characteristics
Evolutionary stage	main sequence star
Spectral type	G4[3]
B−V color index	0.45
J−H color index	0.328[citation needed]
J−K color index	0.422[citation needed]
Astrometry
Radial velocity (Rv)	-2.698±0.0028[4] km/s
Proper motion (μ)	RA: -29.268±0.061[1] mas/yr Dec.: -6.293±0.047[1] mas/yr
Parallax (π)	4.714±0.0324 mas[1]
Distance	692 ± 5 ly (212 ± 1 pc)
Details[3][5]
Mass	1.00±0.03 M☉
Radius	0.92 R☉
Surface gravity (log g)	4.50±0.15 cgs
Temperature	5615±55 K
Metallicity [Fe/H]	-0.07±0.1 dex
Rotational velocity (v sin i)	3.0±1 km/s
Age	0.02+3.96 −0.01 Gyr
Other designations
WASP-25, Gaia DR2 6186950525042445824, TYC 6706-861-1, 2MASS J13012637-2731199, DENIS J130126.3-273120[6]
Database references
SIMBAD	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.^[3]

Planetary system

The "Hot Jupiter" class planet WASP-25b was discovered around WASP-25 in 2010.^[3] 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.^[7] A habitability study in 2018 found WASP-25b does not adversely affect the stability of planetary orbits in the habitable zone of WASP-25.^[8]

The WASP-25 planetary system^[9][10]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.58±0.04 MJ	0.0474±0.0004	3.764825±0.000005	0	88.33±0.32°	1.26+0.06 −0.05 RJ