About this world
WASP-38 b is a gas giant orbiting WASP-38, a yellow-white F-type star (type F8V) 444 light-years from Earth. It is about 1.2 times the size of Jupiter and holds 3.4 Jupiter masses. It completes an orbit every 6.87 days at 0.075 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 1,250 K (977 °C): far too hot for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium. Its atmosphere has already been studied in one spectroscopic observation.
It was discovered in 2010 by transit with SuperWASP. A planet crosses its star and dims it by a tiny, periodic fraction.