About this world
HIP 54597 b is a gas giant orbiting HIP 54597, an orange dwarf (type K5V) 130 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass) and holds 2.4 Jupiter masses. It completes an orbit every 8.96 years at 4 AU from its star.
Its equilibrium temperature is about 94 K (−179 °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 La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.