WASP-189 b: Difference between revisions
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'''WASP-189b''' (also known as '''WASP-189 b''', '''HD 133112b''' and '''HD 133112 b''') is an [[extrasolar planet]] that has an orbital period around its host star, WASP-189 (HD 133112), of less than three days, and is about 322 light-years away in the [[Libra (constellation)|Libra constellation]].<ref name="EA-20200928" /><ref name="CHEOPS" /><ref name="A&A-20200917" /> |
'''WASP-189b''' (also known as '''WASP-189 b''', '''HD 133112b''' and '''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)|Libra constellation]].<ref name="EA-20200928" /><ref name="CHEOPS" /><ref name="A&A-20200917" /> |
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In 2020, astronomers used [[CHEOPS]] to observe WASP-189b. Based on a passage behind its host star ([[occultation]]) the planet's brightness could be measured and the temperature was estimated to be {{convert|3200|C|F K|abbr=on}}. Based on a passage in front of its host star ([[Transit (astronomy)|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.<ref name="EA-20200928">{{cite news |author=[[University of Bern]] |title=First study with CHEOPS data describes one of the most extreme planets in the universe |url=https://www.eurekalert.org/pub_releases/2020-09/uob-fsw092520.php |date=28 September 2020 |work=[[EurekAlert!]] |accessdate=28 September 2020 }}</ref><ref name="CHEOPS">{{cite web |title=First results from Cheops: ESA’s exoplanet observer reveals extreme alien world |url=http://www.esa.int/Science_Exploration/Space_Science/Cheops/First_results_from_Cheops_ESA_s_exoplanet_observer_reveals_extreme_alien_world |website=esa.int |publisher=Esa |accessdate=28 September 2020}}</ref><ref name="A&A-20200917">{{cite journal |author=Lendl, M. |display-authors=et al.|title=The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS? |url=https://www.aanda.org/articles/aa/pdf/forth/aa38677-20.pdf |date=17 September 2020 |journal=[[Astronomy & Astrophysics]] |doi=10.1051/0004-6361/202038677 |accessdate=28 September 2020 }}</ref> |
In 2020, astronomers used [[CHEOPS]] to observe WASP-189b. Based on a passage behind its host star ([[occultation]]) the planet's brightness could be measured and the temperature was estimated to be {{convert|3200|C|F K|abbr=on}}. Based on a passage in front of its host star ([[Transit (astronomy)|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.<ref name="EA-20200928">{{cite news |author=[[University of Bern]] |title=First study with CHEOPS data describes one of the most extreme planets in the universe |url=https://www.eurekalert.org/pub_releases/2020-09/uob-fsw092520.php |date=28 September 2020 |work=[[EurekAlert!]] |accessdate=28 September 2020 }}</ref><ref name="CHEOPS">{{cite web |title=First results from Cheops: ESA’s exoplanet observer reveals extreme alien world |url=http://www.esa.int/Science_Exploration/Space_Science/Cheops/First_results_from_Cheops_ESA_s_exoplanet_observer_reveals_extreme_alien_world |website=esa.int |publisher=Esa |accessdate=28 September 2020}}</ref><ref name="A&A-20200917">{{cite journal |author=Lendl, M. |display-authors=et al.|title=The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS? |url=https://www.aanda.org/articles/aa/pdf/forth/aa38677-20.pdf |date=17 September 2020 |journal=[[Astronomy & Astrophysics]] |doi=10.1051/0004-6361/202038677 |accessdate=28 September 2020 }}</ref> |
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Revision as of 17:15, 29 September 2020
| Discovery | |
|---|---|
| Transit[1][2] | |
| Orbital characteristics | |
| Star | WASP-189 (HD 133112) |
WASP-189b (also known as WASP-189 b, HD 133112b and 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]
In 2020, astronomers used CHEOPS to observe WASP-189b. 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
- ^ 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.
- ^ 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. doi:10.1051/0004-6361/202038677. Retrieved 28 September 2020.
