HAT-P-25 is a G-type main-sequence star about 985 light-years away. It has a very low flare activity.[4] The star is enriched in heavy elements, having about twice amount of metals compared to solar abundance.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 13m 44.4981s[1] |
| Declination | +25° 11′ 50.689″[1] |
| Apparent magnitude (V) | 13.15[2] |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: 13.490(21) mas/yr[1] Dec.: −13.684(16) mas/yr[1] |
| Parallax (π) | 3.3128 ± 0.0178 mas[1] |
| Distance | 985 ± 5 ly (302 ± 2 pc) |
| Details[3] | |
| Mass | 1.012+0.051 −0.051 M☉ |
| Radius | 0.919±0.034 R☉ |
| Surface gravity (log g) | 4.516+0.026 −0.025 cgs |
| Temperature | 5519+78 −76 K |
| Metallicity | 0.29±0.08 |
| Age | 3.2±2.3 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Planetary system
In 2010 a transiting hot Jupiter like planet was detected.[5] It has an equilibrium temperature of 1182±25 K.[3] The stability of orbits within circumstellar habitable zone is not significantly affected by the HAT-P-25b planet.[6]
| 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 |
References
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