WASP-189 b

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][3] It was first discovered in 2018, and was observed in 2020 by CHEOPS.

WASP-189 b
Discovery
Discovery date2018
Transit[1][2]
Orbital characteristics
0.05053
2.72 d
StarWASP-189 (HD 133112)
Physical characteristics
Mass1.99
Temperature3470 K

    Discovery and observations

    WASP-189 b was first discovered in 2018.[4] 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. The light curve during the transit revealed that the star itself is larger and cooler at its equator than at the poles, making the poles of the star appear brighter. Adding to this asymmetry is the fact that the orbit of WASP-189b is highly inclined; it passes close to the star's poles.[1][2][3]

    See also

    References
    1. 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.
    2. "First results from Cheops: ESA's exoplanet observer reveals extreme alien world". esa.int. Esa. Retrieved 28 September 2020.
    3. Lendl, M.; et al. (17 September 2020). "The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS?" (PDF). Astronomy & Astrophysics. doi:10.1051/0004-6361/202038677. Retrieved 28 September 2020.
    4. 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].
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