WASP-88

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.

WASP-88

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
Gaia DR2 6482103014085857024, 2MASS J20380268-4827434[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]

The WASP-88 planetary system^[6]

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