Home›Exoplanets›HAT-P-9 bHAT-P-9 bOrbiting HAT-P-9Open encyclopedia entry →Host starHAT-P-9Discovery year2008Discovery facilityHATNetOrbital period (days)3.9228Radius (Earth radii)15.614Mass (Earth masses)238.055Equilibrium temp (K)1540Distance (parsecs)455.20