WASP-22b

WASP-22b, also named Koyopa', is an extrasolar planet orbiting the Sun-like star WASP-22 320 pc 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 Koyopa'. Koyopa' is the word associated with lightning in K'iche' (Quiché) Mayan language.

Physical characteristics
The Rossiter-McLaughlin effect -based study in 2011 has determined the planetary orbit is slightly misaligned to the rotational axis of the parent star, with reported angle 22$$ degrees.