WASP-189 b (also known as HD 133112 b) is an extrasolar planet that has an orbital period around its host star, WASP-189 (HD 133112), of less than three earth days, and is about 322 light-years away in the Libra constellation.[1][2][4] It was first discovered in 2018, and was observed in 2020 by CHEOPS.
| Discovery | |
|---|---|
| Discovery date | 2018 |
| Transit[1][2] | |
| Orbital characteristics | |
| 0.05053 | |
| 2.72 d | |
| Star | WASP-189 (HD 133112) |
| Physical characteristics | |
Mean radius | 1.600+0.017 −0.016 RJ |
| Mass | 1.99 MJ |
| Albedo | <0.48[3] |
| Temperature | 3470 K |
Discovery and observations edit
WASP-189 b was first discovered in 2018.[5] In 2020, astronomers used CHEOPS to observe it. Based on a passage behind its host star (occultation) the planet's brightness could be measured and the temperature was estimated to be 3,200 °C (5,790 °F; 3,470 K). Based on a passage in front of its host star (transit) the radius is 1.6 times the radius of Jupiter.[1][2][4] Its atmosphere contains titanium oxide, and also contains metals such as chromium, magnesium, vanadium and manganese.[6]
See also edit
References edit
- ^ a b c University of Bern (28 September 2020). "First study with CHEOPS data describes one of the most extreme planets in the universe". EurekAlert!. Retrieved 28 September 2020.
- ^ a b c "First results from Cheops: ESA's exoplanet observer reveals extreme alien world". esa.int. Esa. Retrieved 28 September 2020.
- ^ Deline, A.; et al. (2022), "The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve", Astronomy & Astrophysics, 659: A74, arXiv:2201.04518, Bibcode:2022A&A...659A..74D, doi:10.1051/0004-6361/202142400, S2CID 245877604
- ^ a b Lendl, M.; et al. (17 September 2020). "The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS?" (PDF). Astronomy & Astrophysics. 643: A94. arXiv:2009.13403. Bibcode:2020A&A...643A..94L. doi:10.1051/0004-6361/202038677. Retrieved 28 September 2020.
- ^ Anderson, D. R.; Temple, L. Y.; Nielsen, L. D.; Burdanov, A.; Hellier, C.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Gillon, M.; Jehin, E.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Pozuelos, F. J.; Queloz, D.; Ségransan, D.; Smalley, B.; Triaud, A. H. M. J.; Turner, O. D.; Udry, S.; West, R. G. (2018). "WASP-189b: An ultra-hot Jupiter transiting the bright a star HR 5599 in a polar orbit". arXiv:1809.04897 [astro-ph.EP].
- ^ Prinoth, B.; Hoeijmakers, H. J.; Kitzmann, D.; Sandvik, E.; Seidel, J. V.; Lendl, M.; Borsato, N. W.; Thorsbro, B.; Anderson, D. R.; Barrado, D.; Kravchenko, K.; Allart, R.; Bourrier, V.; Cegla, H. M.; Ehrenreich, D.; Fisher, C.; Lovis, C.; Guzmán-Mesa, A.; Grimm, S.; Hooton, M.; Morris, B. M.; Oreshenko, M.; Pino, L.; Heng, K. (2022). "Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189 B". Nature Astronomy. 6 (4): 449–457. arXiv:2111.12732. Bibcode:2022NatAs...6..449P. doi:10.1038/s41550-021-01581-z. S2CID 244708931.
External links edit
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