WASP-22b, also named Koyopaʼ, is an extrasolar planet orbiting the Sun-like star WASP-22 320 parsecs (1,000 ly) in the constellation Eridanus. 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.
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 Koyopaʼ. Koyopaʼ is the word associated with lightning in Kʼicheʼ (Quiché) Mayan language.
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.
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