| 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 |
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.[3]
Planetary system
[edit]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 |
References
[edit]- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f g h Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e Bohn, A. J.; Southworth, J.; Ginski, C.; Kenworthy, M. A.; Maxted, P. F. L.; Evans, D. F. (2020), "A multiplicity study of transiting exoplanet host stars. I. High-contrast imaging with VLT/SPHERE", Astronomy & Astrophysics, 635: A73, arXiv:2001.08224, Bibcode:2020A&A...635A..73B, doi:10.1051/0004-6361/201937127, S2CID 210861118
- ^ a b c Delrez, L.; Van Grootel, V.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Neveu-VanMalle, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (2013), Transiting planets from WASP-South, Euler and TRAPPIST:WASP-68 b, WASP-73 b and WASP-88 b, three hot Jupiters transiting evolved solar-type stars, arXiv:1312.1827, doi:10.1051/0004-6361/201323204, S2CID 54846964
- ^ a b Andreasen, D. T.; Sousa, S. G.; Tsantaki, M.; Teixeira, G. D. C.; Mortier, A.; Santos, N. C.; Suarez-Andres, L.; Delgado-Mena, E.; Ferreira, A. C. S. (2017), "SWEET-Cat update and FASMA A new minimization procedure for stellar parameters using high-quality spectra", Astronomy & Astrophysics, A69: 600, arXiv:1703.06671, Bibcode:2017A&A...600A..69A, doi:10.1051/0004-6361/201629967, S2CID 119534579
- ^ a b c d Bonomo, A. S.; Desidera, S.; Benatti, S.; Borsa, F.; Crespi, S.; Damasso, M.; Lanza, A. F.; Sozzetti, A.; Lodato, G.; Marzari, F.; Boccato, C.; Claudi, R. U.; Cosentino, R.; Covino, E.; Gratton, R.; Maggio, A.; Micela, G.; Molinari, E.; Pagano, I.; Piotto, G.; Poretti, E.; Smareglia, R.; Affer, L.; Biazzo, K.; Bignamini, A.; Esposito, M.; Giacobbe, P.; Hébrard, G.; Malavolta, L.; et al. (2017), "The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets", Astronomy & Astrophysics, A107: 602, arXiv:1704.00373, Bibcode:2017A&A...602A.107B, doi:10.1051/0004-6361/201629882, S2CID 118923163
- ^ "WASP-88". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-25.
- ^ Kabáth, P.; Žák, Jiří; Boffin, H. M. J.; Ivanov, V. D.; Jones, D.; Skarka, M. (2019), "Detection limits of exoplanetary atmospheres with 2-m class telescopes", Publications of the Astronomical Society of the Pacific, 131 (1002): 085001, arXiv:1905.04665, Bibcode:2019PASP..131h5001K, doi:10.1088/1538-3873/ab2143, S2CID 152282971
- ^ Spyratos, Petros; Nikolov, Nikolay; Southworth, John; Constantinou, Savvas; Madhusudhan, Nikku; Carter, Aarynn L.; De Mooij, Ernst J W.; Fortney, Jonathan J.; Gibson, Neale P.; Goyal, Jayesh M.; Helling, Christiane; Mayne, Nathan J.; Mikal-Evans, Thomas (2021), "Transmission spectroscopy with VLT FORS2: A featureless spectrum for the low-density transiting exoplanet WASP-88b", Monthly Notices of the Royal Astronomical Society, 506 (2): 2853–2870, arXiv:2106.14808, doi:10.1093/mnras/stab1847
