About this world
K2-71 b is a sub-Neptune orbiting K2-71, an orange dwarf 500 light-years from Earth. It is about 2.1 times the size of Earth. It completes an orbit every 6.99 days at 0.056 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 533 K (260 °C): far too hot for liquid water on its surface. By the "cosmic shoreline", it has likely held on to an atmosphere.
It was discovered in 2016 by transit with K2. A planet crosses its star and dims it by a tiny, periodic fraction.