Observed (solid lines) and computed (dashed lines, seasonal ejection) isophotes on the VLT image of 2008, September 4 (left panel) and of the CARA image on 2009, January 25 (right panel) according to the Afρ curve shown in Fig. 13. The innermost isophote corresponds to Af = 1.8 × 10^-7 in the right panel, with a better fit of the sunward tail than in Fig. 10; and to Af = 3 × 10^-6 in the left panel, a factor 3 higher than in Fig. 6.