Temperature of the sorption cooler heat exchanger on V-groove 3 (PC3C), and the temperature stabilization assembly (TSA) power, as functions of time. The sorption cooler including the TSA is the dominant heat load on V-groove 3. As TSA power is increased, the heat lifted by the sorption cooler increases, the load on V-groove 3 increases, and its temperature rises. A smaller seasonal effect of the distance of Planck from the Sun is superimposed on this general trend. The closest approach to the Sun occurred at the beginning of January.