About this world
HD 108147 b is a gas giant orbiting HD 108147, a yellow-white F-type star (type F8VCH+0) 127 light-years from Earth. It is about 0.97 times the size of Jupiter (its size estimated from its mass), with at least 0.26 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 10.9 days at 0.1 AU from its star, closer than Mercury is to the Sun, on a strongly elongated orbit (e = 0.53).
Its equilibrium temperature is about 890 K (617 °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 2002 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.