WASP-22b

WASP-22b / Koyopa'
A comparison between the sizes of WASP-22b (right) and Jupiter
Discovery
Discovered byMaxted, et al.
Discovery siteSouth African Astronomical Observatory
Discovery datePublished December 2010
Transit photometry
Orbital characteristics
Epoch J2000
0.04698 (± 0.00037) AU
Eccentricity0.0
3.5327313 (± 5.8e-06) d
Inclination88.26 (± 0.91)
StarWASP-22
Physical characteristics
1.199 RJ
Mass0.617 MJ
Temperature1298 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 and 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-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.[8]

References

  1. ^ Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
  2. ^ "CONFIRMED PLANET OVERVIEW PAGE". Nasa Exoplanet Archive. Retrieved 2016-04-26.
  3. ^ Maxted, P. F. L.; Anderson, D. R.; Gillon, M.; Hellier, C.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Wilson, D. M. (2010-01-01). "WASP-22 b: A Transiting "Hot Jupiter" Planet in a Hierarchical Triple System". The Astronomical Journal. 140 (6): 2007. arXiv:1004.1514. Bibcode:2010AJ....140.2007M. doi:10.1088/0004-6256/140/6/2007. ISSN 1538-3881. S2CID 44214554.
  4. ^ "NameExoWorlds". 2019. Retrieved 6 September 2019.
  5. ^ "Naming". 2019. Retrieved 6 September 2019.
  6. ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
  7. ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  8. ^ Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; Vanhuysse, M. (2011). "Spin-orbit measurements and refined parameters for the exoplanet systems WASP-22 and WASP-26". Astronomy & Astrophysics. 534: A16. arXiv:1106.6092. Bibcode:2011A&A...534A..16A. doi:10.1051/0004-6361/201117597. S2CID 31204371.


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