Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Indus |
Right ascension | 20h 38m 02.6870s [1] |
Declination | −48° 27′ 43.4255″ [1] |
Apparent magnitude (V) | 11.39 [2] |
Characteristics | |
Evolutionary stage | main-sequence star or subgiant star [3] |
Spectral type | F6 [3] |
Astrometry | |
Radial velocity (Rv) | −5.1±0.6 [4] km/s |
Proper motion (μ) |
RA: 5.890
[4]
mas/
yr Dec.: −4.892 [4] mas/ yr |
Parallax (π) | 1.7844 ± 0.0185 mas [4] |
Distance | 1,830 ± 20
ly (560 ± 6 pc) |
Position (relative to WASP-88) [2] | |
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☉ |
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 [2] M☉ |
Temperature | 2844+155 −209 [2] K |
Other designations | |
Database references | |
SIMBAD | data |
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.
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. [2]
In 2013, one planet, named WASP-88b, was discovered on a tight, circular orbit. [3] The planet is highly inflated, and may be an easy target for atmospheric characterization. Planetary equilibrium temperature is 1775 K. [7] The planetary atmosphere transmission spectrum is gray and featureless, probably indicating a large concentration of hazes. [8]
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 |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Indus |
Right ascension | 20h 38m 02.6870s [1] |
Declination | −48° 27′ 43.4255″ [1] |
Apparent magnitude (V) | 11.39 [2] |
Characteristics | |
Evolutionary stage | main-sequence star or subgiant star [3] |
Spectral type | F6 [3] |
Astrometry | |
Radial velocity (Rv) | −5.1±0.6 [4] km/s |
Proper motion (μ) |
RA: 5.890
[4]
mas/
yr Dec.: −4.892 [4] mas/ yr |
Parallax (π) | 1.7844 ± 0.0185 mas [4] |
Distance | 1,830 ± 20
ly (560 ± 6 pc) |
Position (relative to WASP-88) [2] | |
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☉ |
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 [2] M☉ |
Temperature | 2844+155 −209 [2] K |
Other designations | |
Database references | |
SIMBAD | data |
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.
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. [2]
In 2013, one planet, named WASP-88b, was discovered on a tight, circular orbit. [3] The planet is highly inflated, and may be an easy target for atmospheric characterization. Planetary equilibrium temperature is 1775 K. [7] The planetary atmosphere transmission spectrum is gray and featureless, probably indicating a large concentration of hazes. [8]
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 |