About this world
CoRoT-8 b is a Neptune-like planet orbiting CoRoT-8, an orange dwarf (type K1V) 1.05 thousand light-years from Earth. It is about 0.57 times the size of Jupiter and holds 0.22 Jupiter masses. It completes an orbit every 6.21 days at 0.063 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 870 K (597 °C): far too hot for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2010 by transit with CoRoT. A planet crosses its star and dims it by a tiny, periodic fraction.