About this world
KIC 9663113 b is a Neptune-like planet orbiting KIC 9663113, a yellow-white F-type star 5.2 thousand light-years from Earth. It is about 4.6 times the size of Earth. It completes an orbit every 572 days at 1.6 AU from its star.
Its equilibrium temperature is about 264 K (−9 °C): too cold for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2015 by transit with Kepler. A planet crosses its star and dims it by a tiny, periodic fraction. KIC 9663113 has 2 known planets; the others are Kepler-458 c.