Io's activity is from about ~ 1 W per sq. metre of heat
...thus the 0.13 milliwatts for Enceladus may not be so odd. That does seem a tad low in my mind though.
Space/Science » in reply to Dione power source
...thus the 0.13 milliwatts for Enceladus may not be so odd. That does seem a tad low in my mind though.