About this world
HD 99706 c is a gas giant orbiting HD 99706, a giant star (type K0) 478 light-years from Earth. It is about 1.1 times the size of Jupiter (its size estimated from its mass), with at least 5.7 Jupiter masses (a minimum, measured by radial velocity). It completes an orbit every 3.5 years at 2.6 AU from its star, on a strongly elongated orbit (e = 0.41).
Its equilibrium temperature is about 341 K (68 °C): too cold for liquid water on its surface. At its size it almost certainly keeps a deep envelope of hydrogen and helium.
It was discovered in 2016 by radial velocity with W. M. Keck Observatory. The star wobbles toward and away from us, Doppler-shifting its spectrum. HD 99706 has 2 known planets; the others are HD 99706 b.