HAT-P-25

HAT-P-25 is a G-type main-sequence star about 985 light-years away. It has a very low flare activity.^[5] The star is enriched in heavy elements, having about twice amount of metals compared to solar abundance.

HAT-P-25

Observation data Epoch J2000      Equinox J2000
Constellation	Aries[1]
Right ascension	03h 13m 44.4981s[2]
Declination	+25° 11′ 50.689″[2]
Apparent magnitude (V)	13.15[3]
Characteristics
Evolutionary stage	main sequence[4]
Spectral type	G5[4]
Astrometry
Proper motion (μ)	RA: 13.490(21) mas/yr[2] Dec.: −13.684(16) mas/yr[2]
Parallax (π)	3.3128±0.0178 mas[2]
Distance	985 ± 5 ly (302 ± 2 pc)
Details[4]
Mass	1.012+0.051 −0.051 M☉
Radius	0.919±0.034 R☉
Luminosity	0.72[2] L☉
Surface gravity (log g)	4.516+0.026 −0.025 cgs
Temperature	5,519+78 −76 K
Metallicity	0.29±0.08
Age	3.2±2.3 Gyr
Other designations
Gaia DR2 3668036348641580288, TYC 320-1027-1, GSC 0320-01027, 2MASS J14123753+0403359[3]
Database references
SIMBAD	data

Planetary system

In 2010 a transiting hot Jupiter like planet was detected.^[6] It has an equilibrium temperature of 1,182±25 K.^[4] The stability of orbits within circumstellar habitable zone is not significantly affected by the HAT-P-25b planet.^[7]

Size comparison of HAT-P-25 b and Jupiter

The HAT-P-25 planetary system^[6][4]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.569+0.023 −0.022 MJ	0.0466±0.0005	3.65281514+0.00000076 −0.00000075	0.023+0.022 −0.014	87.6±0.5°	1.135±0.048 RJ