Enceladus’ melting depth in terms of satellite radius (R_s) as a function of orbital characteristics (top left), planet-moon masses (top right), host semi-major axis (SMA in labels) versus stellar luminosity (bottom left) and moon tidal efficiency versus regolith thickness (bottom right). Red regions mean a desiccated moon, dark gray a frozen moon, and light gray one with at most a thin ice film; crosses represent fiducial values. For Enceladus itself, our model predicts a melting depth of 3.6 km.