About this world
HD 109246 b is a gas giant orbiting HD 109246, a yellow, Sun-like star (type G0V) 221 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 0.86 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 68.3 days at 0.33 AU from its star, closer than Mercury is to the Sun.
Its equilibrium temperature is about 507 K (234 °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 2010 by radial velocity with Haute-Provence Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.