WASP-22b
Jovian size planet orbiting WASP-22
From Wikipedia, the free encyclopedia
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.[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]
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 |
| 3.5327313 (± 5.8e-06) d | |
| Inclination | 88.26 (± 0.91) |
| Star | WASP-22 |
| Physical characteristics | |
| 1.199 RJ | |
| Mass | 0.617 MJ |
| Temperature | 1298 K |
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 Koyopaʼ. Koyopaʼ is the word associated with lightning in Kʼicheʼ (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]
