WASP-88
F-type main sequence star in the constellation Indus
From Wikipedia, the free encyclopedia
WASP-88 is a F-type main-sequence star. Its surface temperature is 6450±61 K. WASP-88 is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.03±0.04,[5] and is younger at an age of 3.0±1.3 billion years.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Indus[1] |
| Right ascension | 20h 38m 02.6869s[2] |
| Declination | −48° 27′ 43.424″[2] |
| Apparent magnitude (V) | 11.39[3] |
| Characteristics | |
| Evolutionary stage | main-sequence[4][2] |
| Spectral type | F6[4] |
| Astrometry | |
| Radial velocity (Rv) | −5.1±0.6[2] km/s |
| Proper motion (μ) | RA: 5.890[2] mas/yr Dec.: −4.892[2] mas/yr |
| Parallax (π) | 1.7844±0.0185 mas[2] |
| Distance | 1,830 ± 20 ly (560 ± 6 pc) |
| Position (relative to WASP-88)[3] | |
| Component | WASP-88B |
| Epoch of observation | 2017 |
| Angular distance | 3.350±0.015″ |
| Position angle | 355.5±0.5° |
| Projected separation | 1877±8 AU |
| Details[5] | |
| WASP-88 | |
| Mass | 1.450±0.050[6] M☉ |
| Radius | 2.08+0.12 −0.06[6] R☉ |
| Luminosity | 5.9[2] L☉ |
| Surface gravity (log g) | 4.24±0.06 cgs |
| Temperature | 6450±61 K |
| Metallicity [Fe/H] | 0.03±0.04 dex |
| Rotational velocity (v sin i) | 8.4±0.8[6] km/s |
| Age | 3.0±1.3 Gyr |
| WASP-88B | |
| Mass | 0.11+0.03 −0.02[3] M☉ |
| Temperature | 2844+155 −209[3] K |
| Other designations | |
| 2MASS J20380268-4827434, Gaia DR2 6482103014085857024[7] | |
| Database references | |
| SIMBAD | data |
A multiplicity survey did detect a candidate red dwarf companion to WASP-88 in 2020, with a 1.65% probability of it being an unrelated background star.[3]
Planetary system
In 2013, one planet, named WASP-88b, was discovered on a tight, circular orbit.[4] The planet is highly inflated, and may be an easy target for atmospheric characterization. Planetary equilibrium temperature is 1775 K.[8] The planetary atmosphere transmission spectrum is gray and featureless, probably indicating a large concentration of hazes.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.570+0.077 −0.078 MJ |
0.06438+0.00073 −0.00074 |
4.954000±0.000019 | <0.13 | 88.0+1.4 −1.5° |
1.70+0.13 −0.07 RJ |