About this world
Kepler-139 e is a gas giant orbiting Kepler-139, a yellow, Sun-like star 1.28 thousand light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass) and holds 1.2 Jupiter masses. It completes an orbit every 5.61 years at 3.2 AU from its star.
Its equilibrium temperature is about 154 K (−119 °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 2023 by radial velocity with W. M. Keck Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum. Kepler-139 has 5 known planets; the others are Kepler-139 d, Kepler-139 b, Kepler-139 c and Kepler-139 f.