HAT-P-25
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries |
| Right ascension | 03h 10m 47.4136016557s[1] |
| Declination | +25° 00′ 41.677262346″[1] |
| Apparent magnitude (V) | 13.15[1] |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: 13.49 mas/yr Dec.: -13.586 mas/yr |
| Parallax (π) | 3.3009 ± 0.0466 mas[1] |
| Distance | 990 ± 10 ly (303 ± 4 pc) |
| Details[2] | |
| 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 |
HAT-P-25 is a G-type main-sequence star about 990 light-years away. It has a very low flare activity.[3] The star is enriched in heavy elements, having about twice amount of metals compared to solar abundance.
Planetary system
In 2010 a transiting hot Jupiter like planet was detected.[4] It has an equilibrium temperature of 1182±25 K.[2] The stability of orbits within circumstellar habitable zone is not significantly affected by the HAT-P-25b planet.[5]
| 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
- ^ a b c d e HAT-P-25 -- Star
- ^ a b c Transiting Exoplanet Monitoring Project (TEMP). IV. Refined System Parameters, Transit Timing Variations and Orbital Stability of the Transiting Planetary System HAT-P-25, 2018, arXiv:1805.01580
- ^ Evgenya L. Shkolnik, "AN ULTRAVIOLET INVESTIGATION OF ACTIVITY ON EXOPLANET HOST STARS", 2013
- ^ a b HAT-P-25b: a Hot-Jupiter Transiting a Moderately Faint G Star, 2010, arXiv:1008.3565
- ^ Nikolaos Georgakarakos, Siegfried Eggl, and Ian Dobbs-Dixon, "Giant Planets: Good Neighbors for Habitable Worlds?", 2018
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