About this world
HD 126105 b is a gas giant orbiting HD 126105, a giant star (type K1III) 270 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 1.7 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 524 days at 1.4 AU from its star.
Its equilibrium temperature is about 414 K (140 °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 2026 by radial velocity with Multiple Facilities. The star wobbles toward and away from us, Doppler-shifting its spectrum.