Astronomy:WASP-22b
 A comparison between the sizes of WASP-22b (right) and Jupiter | |
| Discovery | |
|---|---|
| Discovered by | Maxted, et al. |
| Discovery site | South African Astronomical Observatory |
| Discovery date | Published December 2010 |
| Transit photometry | |
| Orbital characteristics | |
| Epoch J2000 | |
| 0.04698 (± 0.00037) AU | |
| Eccentricity | 0.0 |
| Orbital period | 3.5327313 (± 5.8e-06) d |
| Inclination | 88.26 (± 0.91) |
| Star | WASP-22 |
| Physical characteristics | |
| Mean radius | 1.199 |♃|J}}}}}} |
| Mass | 0.617 |♃|J}}}}}} |
| Physics | 1298 K |
WASP-22b, also named Koyopa', is an extrasolar planet orbiting the Sun-like star WASP-22 320 parsecs (1,000 ly) in the constellation Eridanus.[1][2] This hot Jupiter has an orbit of 3.53 days and a mass of 0.617 MJ was detected by transit via SuperWASP. The system is a hierarchical triple system.[3]
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.[4][5] 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.[6][7]
Physical characteristics
The Rossiter-McLaughlin effect effect based study in 2011 have determined the planetary orbit is slightly misaligned to the rotational axis of the parent star, with reported angle 22±16 degrees.[8]
References
- ↑ Brown, A. G. A et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics 595: A2. doi:10.1051/0004-6361/201629512. Bibcode: 2016A&A...595A...2G. https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html.Gaia Data Release 1 catalog entry
- ↑ "CONFIRMED PLANET OVERVIEW PAGE". Nasa Exoplanet Archive. http://exoplanetarchive.ipac.caltech.edu/cgi-bin/DisplayOverview/nph-DisplayOverview?objname=WASP-22+b&type=CONFIRMED_PLANET.
- ↑ Maxted, P. F. L.; Anderson, D. R.; Gillon, M.; Hellier, C.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G. et al. (2010-01-01). "WASP-22 b: A Transiting "Hot Jupiter" Planet in a Hierarchical Triple System" (in en). The Astronomical Journal 140 (6): 2007. doi:10.1088/0004-6256/140/6/2007. ISSN 1538-3881. Bibcode: 2010AJ....140.2007M. http://stacks.iop.org/1538-3881/140/i=6/a=2007.
- ↑ "NameExoWorlds". 2019. http://www.nameexoworlds.iau.org/. Retrieved 6 September 2019.
- ↑ "Naming". 2019. https://wasp-planets.net/naming/. Retrieved 6 September 2019.
- ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.
- ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.
- ↑ Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Queloz, D.; Smalley, B. et al. (2011). "Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26". Astronomy & Astrophysics 534: A16. doi:10.1051/0004-6361/201117597. Bibcode: 2011A&A...534A..16A.
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