About this world
HD 219415 b is a gas giant orbiting HD 219415, a giant star (type K0III) 539 light-years from Earth. It is about 1.2 times the size of Jupiter (its size estimated from its mass), with at least 1 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 5.73 years at 3.2 AU from its star, on a strongly elongated orbit (e = 0.4).
Its equilibrium temperature is about 221 K (−52 °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 2012 by radial velocity with McDonald Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.