Astronomy:WASP-189 b
| Discovery | |
|---|---|
| Discovery date | 2018 |
| Transit[1][2] | |
| Orbital characteristics | |
| 0.05053 | |
| Orbital period | 2.72 d |
| Star | WASP-189 (HD 133112) |
| Physical characteristics | |
| Mean radius | 1.600+0.017 −0.016 |♃|J}}}}}} |
| Mass | 1.99[clarification needed] |
| Albedo | <0.48[3] |
| Physics | 3470 K |
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 and observations
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
References
- ↑ 1.0 1.1 1.2 University of Bern (28 September 2020). "First study with CHEOPS data describes one of the most extreme planets in the universe". EurekAlert!. https://www.eurekalert.org/pub_releases/2020-09/uob-fsw092520.php. Retrieved 28 September 2020.
- ↑ 2.0 2.1 2.2 "First results from Cheops: ESA's exoplanet observer reveals extreme alien world". Esa. http://www.esa.int/Science_Exploration/Space_Science/Cheops/First_results_from_Cheops_ESA_s_exoplanet_observer_reveals_extreme_alien_world. 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, doi:10.1051/0004-6361/202142400, Bibcode: 2022A&A...659A..74D
- ↑ 4.0 4.1 Lendl, M. (17 September 2020). "The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS?". Astronomy & Astrophysics 643: A94. doi:10.1051/0004-6361/202038677. Bibcode: 2020A&A...643A..94L. https://www.aanda.org/articles/aa/pdf/forth/aa38677-20.pdf. 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. et al. (2022). "Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189 B". Nature Astronomy 6 (4): 449–457. doi:10.1038/s41550-021-01581-z. Bibcode: 2022NatAs...6..449P.
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