WASP-50
WASP-50, also named Chaophraya, is a G-type main-sequence star about 594 light-years away in the constellation Eridanus. The star is older than the Sun and slightly depleted in heavy elements compared to the Sun, and has a close to average starspot activity. Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on a close orbit.
Nomenclature
The designation WASP-50 comes from Wide Angle Search for Planets, a consortium of academic organisations detecting exoplanets using the transit method.This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to Thailand. The approved names were Chaophraya for the star and Maeping for the planet, after the Chao Phraya and Mae Ping rivers in Thailand.
The Thai names Chaophraya and Maeping were proposed by Duangrat Wichiansri following a national vote conducted by NARIT in 2019,