About this world
HD 125136 b is a gas giant orbiting HD 125136, a giant star 395 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 2.3 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 2.33 years at 2 AU from its star.
Its equilibrium temperature is about 390 K (117 °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 2026 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.