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Star in the constellation Hydra From Wikipedia, the free encyclopedia
WASP-25 is a yellow main sequence star in the constellation of Hydra.
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 | |
Database references | |
SIMBAD | data |
WASP-25 is slightly metal-poor (85% of Solar amount) and is probably a young star which has just entered the main sequence.[3]
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]
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 |
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