About this world
HD 11977 b is a gas giant orbiting HD 11977, a giant star (type G8III/I) 222 light-years from Earth. It is about 1.1 times the size of Jupiter (its size estimated from its mass), with at least 6.5 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 711 days at 1.9 AU from its star, on a strongly elongated orbit (e = 0.4).
Its equilibrium temperature is about 548 K (275 °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 2005 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.