About this world
HD 185283 b is a gas giant orbiting HD 185283, an orange dwarf (type K3V) 102 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass) and holds 1.3 Jupiter masses. It completes an orbit every 11.1 years at 4.6 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.