About this world
KOI-1833 d is a sub-Neptune orbiting Kepler-968, an orange dwarf 947 light-years from Earth. It is about 2.6 times the size of Earth and holds 11 Earth masses. It completes an orbit every 7.68 days at 0.063 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 613 K (340 °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 2021 by transit with Kepler. A planet crosses its star and dims it by a tiny, periodic fraction. Kepler-968 has 3 known planets; the others are Kepler-968 b and Kepler-968 c.