WASP-189 b

Extrasolar planet in the constellation Libra

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]

References

^ ^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

Planet WASP-189 b

Constellation of Libra

Stars

Bayer	α¹ α² (Zubenelgenubi) β (Zubeneschamali) γ (Zubenelhakrabi) δ (Zuben Elakribi) ε ζ¹ ζ² ζ³ ζ⁴ η θ ι¹ ι² κ λ μ ν ξ¹ ξ² ο σ (Brachium) τ υ
Flamsteed	2 3 4 5 10 11 12 16 17 18 22 23 26 28 30 36 37 41 42 47 48 49 50 30 Ser
Variable	HO KU KX
HR	5455
HD	133112 133131 134439 134440 139139 140283 141569 141937
Other	2M1510 2MASS 1507−1627 Gliese 555 HE 1523-0901 WASP-57 WISE 1541−2250