About this world
HD 1690 b is a gas giant orbiting HD 1690, a giant star (type K1III) 2.45 thousand light-years from Earth. It is about 1.1 times the size of Jupiter (its size estimated from its mass), with at least 8.8 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 533 days at 1.4 AU from its star, on a strongly elongated orbit (e = 0.64).
Its equilibrium temperature is about 842 K (569 °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 2010 by radial velocity with La Silla Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum.