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WASP-90 
Summary
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.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 02m 07.6772s[1] |
| Declination | +07° 03′ 22.518″[1] |
| Apparent magnitude (V) | 11.63[2] |
| Characteristics | |
| Spectral type | F6IV/V[3] |
| Astrometry | |
| Proper motion (μ) | RA: −9.080(31) mas/yr[1] Dec.: 5.645(23) mas/yr[1] |
| Parallax (π) | 2.0870 ± 0.0334 mas[1] |
| Distance | 1,560 ± 30 ly (479 ± 8 pc) |
| Details[3] | |
| Mass | 1.55±0.10 M☉ |
| Radius | 1.98±0.09 R☉ |
| Luminosity | 4.3±0.2[4] L☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 6228+125 −133[5] 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 |
Properties edit
WASP-69 has a classification of F6. The paper states that the stars are slightly evolved, with radius up to twice that of the Sun. WASP-69 is 55% more massive than the Sun, and almost twice as large. It 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, the star has a high metallicity that is 28% greater than that of the Sun.
Planetary system edit
In 2016, a bloated "hot Jupiter" was discovered orbiting the star. Due to the hosts state, the planet is 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
- ^ a b c d 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 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.