WASP-59
Star in the constellation Pegasus From Wikipedia, the free encyclopedia
WASP-59 is a K-type main-sequence star about 379 light-years away. The star's age is essentially unconstrained by observations. WASP-59 is slightly depleted in heavy elements, having 70% of the solar abundance of iron.[2] The star produces extremely low levels of ultraviolet light, indicating an absence of flare activity.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 18m 29.5475s[1] |
| Declination | 24° 53′ 21.4364″[1] |
| Apparent magnitude (V) | 12.78 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | K5V |
| Astrometry | |
| Radial velocity (Rv) | -56.82[1] km/s |
| Proper motion (μ) | RA: 33.729[1] mas/yr Dec.: −2.522[1] mas/yr |
| Parallax (π) | 8.5968±0.0421 mas[1] |
| Distance | 379 ± 2 ly (116.3 ± 0.6 pc) |
| Details[2] | |
| Mass | 0.719±0.035 M☉ |
| Radius | 0.613±0.044 R☉ |
| Temperature | 4650±150 K |
| Metallicity [Fe/H] | -0.15±0.11 dex |
| Rotational velocity (v sin i) | 2.3±1.5 km/s |
| Age | 7±7 Gyr |
| Other designations | |
| Gaia DR2 2841043011433969152, 2MASS J23182955+2453214[3] | |
| Database references | |
| SIMBAD | data |
A multiplicity survey in 2015 did not detect any stellar companions to WASP-59.[5]
Planetary system
In 2012 a transiting hot Jupiter planet b was detected on a tight, mildly eccentric orbit.[6]
Its equilibrium temperature is 670±35 K.[6] The planet is unusually dense for a gas giant, representing an outlier on a mass-radius diagram.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.857+0.046 −0.047 MJ |
0.0697±0.0011 | 7.919585±0.000010 | 0.101+0.046 −0.048 |
89.27±0.52° | 0.775±0.068 RJ |
References
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