Thermophysical property variations across Dione and Rhea

On Rhea the thermal inertia increases from a background value of 10 J m−2 K−1 s−1/2 to 19 J m−2 K−1 s−1/2 on the ejecta blanket of Inktomi crater, probably due to a mixture of high and low thermal inertia material in this region, such as a fine- and large-grain ice mixture. This is the first time a thermal inertia anomaly has been associated with an impact crater on an icy saturnian satellite. On Rhea the average of the mapped bolometric Bond albedos on the leading and trailing hemispheres are 0.59 ± 0.11 and 0.56 ± 0.13 respectively.