WASP-189 b

{{Short description|Extrasolar planet in the constellation Libra}}

{{Infobox planet

| name = WASP-189 b

| image =

| caption = Size comparison of WASP-189 b with Jupiter.

| discoverer =

| discovered = 2018

| discovery_method = Transit

| apsis =

| aphelion =

| perihelion =

| semimajor = 0.05053

| eccentricity =

| period = 2.72 d

| inclination =

| arg_peri =

| star = WASP-189 (HD 133112)

| mean_radius = {{val|1.600|0.017|0.016}} {{Jupiter radius|link=yes}}

| mass = 1.99 {{Jupiter mass}}

| albedo = <0.48{{citation|arxiv=2201.04518|year=2022|title=The atmosphere and architecture of WASP-189 b probed by its CHEOPS phase curve|doi=10.1051/0004-6361/202142400|last1=Deline|first1=A.|last2=Hooton|first2=M. J.|last3=Lendl|first3=M.|last4=Morris|first4=B.|last5=Salmon|first5=S.|last6=Olofsson|first6=G.|last7=Broeg|first7=C.|last8=Ehrenreich|first8=D.|last9=Beck|first9=M.|last10=Brandeker|first10=A.|last11=Hoyer|first11=S.|last12=Sulis|first12=S.|last13=Van Grootel|first13=V.|last14=Bourrier|first14=V.|last15=Demangeon|first15=O.|last16=Demory|first16=B.-O.|last17=Heng|first17=K.|last18=Parviainen|first18=H.|last19=Serrano|first19=L. M.|last20=Singh|first20=V.|last21=Bonfanti|first21=A.|last22=Fossati|first22=L.|last23=Kitzmann|first23=D.|last24=Sousa|first24=S. G.|last25=Wilson|first25=T. G.|last26=Alibert|first26=Y.|last27=Alonso|first27=R.|last28=Anglada|first28=G.|last29=Bárczy|first29=T.|last30=Barrado Navascues|first30=D.|journal=Astronomy & Astrophysics|volume=659|pages=A74|bibcode=2022A&A...659A..74D|s2cid=245877604|display-authors=1}}

| single_temperature = 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. It was first discovered in 2018, and was observed in 2020 by CHEOPS.

Discovery and observations

WASP-189 b was first discovered in 2018.{{Cite arXiv|eprint=1809.04897|last1=Anderson|first1=D. R.|last2=Temple|first2=L. Y.|last3=Nielsen|first3=L. D.|last4=Burdanov|first4=A.|last5=Hellier|first5=C.|last6=Bouchy|first6=F.|last7=Brown|first7=D. J. A.|last8=Collier Cameron|first8=A.|last9=Gillon|first9=M.|last10=Jehin|first10=E.|last11=Maxted|first11=P. F. L.|last12=Pepe|first12=F.|last13=Pollacco|first13=D.|last14=Pozuelos|first14=F. J.|last15=Queloz|first15=D.|last16=Ségransan|first16=D.|last17=Smalley|first17=B.|last18=Triaud|first18=A. H. M. J.|last19=Turner|first19=O. D.|last20=Udry|first20=S.|last21=West|first21=R. G.|title=WASP-189b: An ultra-hot Jupiter transiting the bright a star HR 5599 in a polar orbit|year=2018|class=astro-ph.EP}} 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 {{convert|3200|C|F K|abbr=on}}. Based on a passage in front of its host star (transit) the radius is 1.6 times the radius of Jupiter.{{cite news |author=University of Bern |author-link=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 }}{{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}}{{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 |volume=643|pages=A94|doi=10.1051/0004-6361/202038677 |arxiv=2009.13403|bibcode=2020A&A...643A..94L|accessdate=28 September 2020 |doi-access=free }} Its atmosphere contains titanium oxide, and also contains metals such as chromium, magnesium, vanadium and manganese.{{cite journal|arxiv=2111.12732|last1=Prinoth|first1=B.|last2=Hoeijmakers|first2=H. J.|last3=Kitzmann|first3=D.|last4=Sandvik|first4=E.|last5=Seidel|first5=J. V.|last6=Lendl|first6=M.|last7=Borsato|first7=N. W.|last8=Thorsbro|first8=B.|last9=Anderson|first9=D. R.|last10=Barrado|first10=D.|last11=Kravchenko|first11=K.|last12=Allart|first12=R.|last13=Bourrier|first13=V.|last14=Cegla|first14=H. M.|last15=Ehrenreich|first15=D.|last16=Fisher|first16=C.|last17=Lovis|first17=C.|last18=Guzmán-Mesa|first18=A.|last19=Grimm|first19=S.|last20=Hooton|first20=M.|last21=Morris|first21=B. M.|last22=Oreshenko|first22=M.|last23=Pino|first23=L.|last24=Heng|first24=K.|title=Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189 B|journal=Nature Astronomy|year=2022|volume=6|issue=4|pages=449–457|doi=10.1038/s41550-021-01581-z|bibcode=2022NatAs...6..449P|s2cid=244708931}}

References

External links

[https://exoplanet.eu/catalog/wasp_189_b--6871/ Planet WASP-189 b]

Category:Exoplanets discovered by WASP

Category:Exoplanets discovered in 2018

Category:Giant planets

Category:Hot Jupiters

Category:Libra (constellation)

Category:Transiting exoplanets

WASP-189 b

Discovery and observations

See also

References

External links