About this world
HD 100777 b is a gas giant orbiting HD 100777, a yellow, Sun-like star (type G8V) 162 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass) and holds 1.2 Jupiter masses. It completes an orbit every 383 days at 1.1 AU from its star, on a strongly elongated orbit (e = 0.38).
Its equilibrium temperature is about 264 K (−9 °C), which places it in the conservative habitable zone: the band where liquid water could exist on a rocky surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2007 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.