First panel: latitude (blue, left) and solar zenith angle (red, right) of Rosetta. Second panel: electron exobase distance, L_c (rose), and the radial distance color-coded by the fraction of cold electrons in a 24 h interval. When this is zero, we set the color to gray. The two lower panels show the energy a 10 eV and 1 eV electron should have at the position of Rosetta, starting at the nucleus surface. The gray overlay are excursion times.