Temperature as a function of cometary depth for the orbital position corresponding to early August 2015. A slow rotator model is applied for Model C accounting for surface erosion. The depth is measured from the surface position after ten orbital periods (showing results for orbits 5−10). The primordial temperature is fixed at 30 K and the thermal inertia is set to 30 J m^-2 K^-1 s^0.5 (upper value from MIRO analysis).