WASP-90
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus[1] |
| Right ascension | 21h 02m 07.6772s[2] |
| Declination | +07° 03′ 22.518″[2] |
| Apparent magnitude (V) | 11.63[3] |
| Characteristics | |
| Evolutionary stage | subgiant[4][2] |
| Spectral type | F6[4] |
| Astrometry | |
| Proper motion (μ) | RA: −9.080(31) mas/yr[2] Dec.: 5.645(23) mas/yr[2] |
| Parallax (π) | 2.0870±0.0334 mas[2] |
| Distance | 1,560 ± 30 ly (479 ± 8 pc) |
| Details[4] | |
| Mass | 1.55±0.10 M☉ |
| Radius | 1.98±0.09 R☉ |
| Luminosity | 4.3±0.2[5] L☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 6228+125 −133[6] K |
| Metallicity [Fe/H] | 0.11±0.14 dex |
| Rotational velocity (v sin i) | 6.0±0.5 km/s |
| Age | 4.40+8.40 −2.40 Gyr |
| Other designations | |
| Gaia DR2 1737061349198867456 | |
| Database references | |
| SIMBAD | data |
WASP-90 is a faint 11th magnitude star located in the northern constellation Equuleus. With an apparent magnitude of 11.63, it is too faint to be detected with the naked eye, but can be seen with a telescope, and is located 1,560 ly (480 pc) from the Solar System.
Properties
[edit]WASP-90 has a classification of F6. The exoplanet discovery paper describes it as having expanded to a "post-MS" radius, about twice that of the Sun. WASP-90 is 55% more massive than the Sun, and radiates at 4.3 times the Sun's luminosity from its photosphere at an effective temperature of 6,430 K. Despite it being a similar age to the Sun, the star has a high metallicity that is 28% greater than that of the Sun.[4]
Planetary system
[edit]In 2016, a bloated "hot Jupiter" was discovered orbiting the star. Due to the host's state, the planet is extremely irradiated.
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.63±0.07 MJ | 0.06±0.00 | 3.92±0.00 | 0.00 | 82.1±0.4° | 1.63±0.09 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 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.
- ^ Watson, C. L.; Henden, A. A.; Price, A. (1 May 2006). "The International Variable Star Index (VSX)". Society for Astronomical Sciences Annual Symposium. 25: 47. Bibcode:2006SASS...25...47W.
- ^ a b c d e West, R. G.; Hellier, C.; Almenara, J.-M.; Anderson, D. R.; Barros, S. C. C.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Deleuil, M.; Delrez, L.; Doyle, A. P.; Faedi, F.; Fumel, A.; Gillon, M.; Gómez Maqueo Chew, Y.; Hébrard, G.; Jehin, E.; Lendl, 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. (1 January 2016). "Three irradiated and bloated hot Jupiters:. WASP-76b, WASP-82b, and WASP-90b". Astronomy and Astrophysics. 585: A126. arXiv:1310.5607. Bibcode:2016A&A...585A.126W. doi:10.1051/0004-6361/201527276. ISSN 0004-6361. S2CID 54746373.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
