WASP-22b
{{Short description|Jovian size planet orbiting WASP-22}}
{{Infobox planet
| name = WASP-22b / Koyopa'
| image = Exoplanet Comparison WASP-22 b.png
| caption = A comparison between the sizes of WASP-22b (right) and Jupiter
| discoverer = Maxted, et al.
| discovery_site = South African Astronomical Observatory
| discovered = Published December 2010
| discovery_method = Transit photometry
| epoch = J2000
| apsis = astron
| semimajor = 0.04698 (± 0.00037) AU
| eccentricity = 0.0
| period = 3.5327313 (± 5.8e-06) d
| inclination = 88.26 (± 0.91)
| star = WASP-22
| mean_radius = 1.199 {{Jupiter radius|link=y}}
| mass = 0.617 {{Jupiter mass|link=y}}
| single_temperature = 1298 K
}}
WASP-22b, also named Koyopa', is an extrasolar planet orbiting the Sun-like star WASP-22 {{convert|320|pc|ly}} in the constellation Eridanus.{{cite web |url=http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=WASP-22+b&type=CONFIRMED_PLANET |title=CONFIRMED PLANET OVERVIEW PAGE |work=Nasa Exoplanet Archive |access-date=2016-04-26 }} This hot Jupiter has an orbit of 3.53 days and a mass of 0.617 MJ and was detected by transit via SuperWASP. The system is a hierarchical triple system.{{Cite journal|last1=Maxted|first1=P. F. L.|last2=Anderson|first2=D. R.|last3=Gillon|first3=M.|last4=Hellier|first4=C.|last5=Queloz|first5=D.|last6=Smalley|first6=B.|last7=Triaud|first7=A. H. M. J.|last8=West|first8=R. G.|last9=Wilson|first9=D. M.|date=2010-01-01|title=WASP-22 b: A Transiting "Hot Jupiter" Planet in a Hierarchical Triple System|url=http://stacks.iop.org/1538-3881/140/i=6/a=2007|journal=The Astronomical Journal|language=en|volume=140|issue=6|pages=2007|doi=10.1088/0004-6256/140/6/2007|issn=1538-3881|arxiv = 1004.1514 |bibcode = 2010AJ....140.2007M |s2cid=44214554 }}
Naming
In 2019 the IAU announced as part of NameExoWorlds that WASP-22 and its planet WASP-22b would be given official names chosen by school children from Guatemala. The star WASP-22 is named Tojil. Tojil is the name of one of the Mayan deities related to rain, storms, and fire. The planet WASP-22b is named Koyopa'. Koyopa' is the word associated with lightning in K'iche' (Quiché) Mayan language.{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}
Physical characteristics
The Rossiter-McLaughlin effect-based study in 2011 has determined the planetary orbit is slightly misaligned with the rotational axis of the parent star, with a reported angle of 22{{±|16}} degrees.{{cite journal|arxiv=1106.6092|doi=10.1051/0004-6361/201117597|title=Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26|year=2011|last1=Anderson|first1=D. R.|last2=Collier Cameron|first2=A.|last3=Gillon|first3=M.|last4=Hellier|first4=C.|last5=Jehin|first5=E.|last6=Lendl|first6=M.|last7=Queloz|first7=D.|last8=Smalley|first8=B.|last9=Triaud|first9=A. H. M. J.|last10=Vanhuysse|first10=M.|journal=Astronomy & Astrophysics|volume=534|pages=A16|bibcode=2011A&A...534A..16A|s2cid=31204371 }}
References
{{reflist|refs=
{{cite web |url=http://www.nameexoworlds.iau.org/ |title=NameExoWorlds |author= |year=2019 |accessdate=6 September 2019}}
{{cite web |url=https://wasp-planets.net/naming/ |title=Naming |author= |year=2019 |accessdate=6 September 2019}}
External links
- [http://wasp-planets.net/ WASP primary website]
}}
Category:Exoplanets discovered by WASP
Category:Transiting exoplanets
Category:Exoplanets discovered in 2010
Category:Exoplanets with proper names
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