About this world
HD 38283 b is a gas giant orbiting HD 38283, a yellow-white F-type star (type F9.5V) 124 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 0.4 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 363 days at 1 AU from its star, on a strongly elongated orbit (e = 0.41).
Its equilibrium temperature is about 349 K (75 °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 2010 by radial velocity with Anglo-Australian Telescope. The star wobbles toward and away from us, Doppler-shifting its spectrum.