About this world
HD 105618 c is a gas giant orbiting HD 105618, a yellow, Sun-like star 229 light-years from Earth. It is about 1.1 times the size of Jupiter (its size estimated from its mass) and holds 26 Jupiter masses. It completes an orbit every 211 years at 36 AU from its star.
Its equilibrium temperature is about 52 K (−222 °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 2022 by radial velocity with Multiple Observatories. The star wobbles toward and away from us, Doppler-shifting its spectrum. HD 105618 has 2 known planets; the others are HD 105618 b.