About this world
HIP 107773 b is a gas giant orbiting HIP 107773, a giant star (type K1III) 343 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 2 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 144 days at 0.72 AU from its star.
Its equilibrium temperature is about 957 K (684 °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 2015 by radial velocity with Multiple Observatories. The star wobbles toward and away from us, Doppler-shifting its spectrum.