WASP-25
Star in the constellation Hydra
From Wikipedia, the free encyclopedia
WASP-25 is a G-type main-sequence star about 701 light-years away in the constellation of Hydra.
| 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] |
| 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]
| 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 |
