About this world
HD 147018 b is a gas giant orbiting HD 147018, a yellow, Sun-like star (type G9V) 132 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 2.1 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 44.2 days at 0.24 AU from its star, closer than Mercury is to the Sun, on a strongly elongated orbit (e = 0.47).
Its equilibrium temperature is about 520 K (247 °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 2009 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum. HD 147018 has 2 known planets; the others are HD 147018 c.