Thermophysical model of Oberon between 5 and 300 μm (black line) for the second epoch (2011-07-12). Photometric measurements are PACS observations (red boxes), the IRTF observation (blue diamond), and the Spitzer-IRS CASSIS data (orange spectrum: leading hemisphere observation;red spectrum: trailing hemisphere data). The CASSIS spectra suffer from Uranus stray light longward of 30 μm. The IRTF and IRS data were re-scaled to the model epoch with . Nevertheless, the IRTF flux appears to be too high with regard to the model, because the IRTF measurement was done under close to pole-on illumination, when the moon was hotter, while the model reflects more a viewing geometry close to equator-on, when the moon was colder due to heat transport to the night side. The insert shows the resulting TPM surface temperature map of Oberon for the range 40–85 K.