Dimensionless parameter p = 2BE/L² of Apophis’s spin. Left panel: pre-encounter values at the abscissa and the post-encounter values, calculated from the purely gravitational model of the spin state change, at the ordinate. As in the previous two figures, symbols come from 1000 nominal model simulations. Right panel: distribution of the p-values, pre-encounter in green, blue, and red for models C, A, and B, respectively, and post-encounter in black. As all values are smaller than unity, the rotation state remains in the SAM mode. The overall increase of the post-encounter values, however, implies the rotation stepped towards the separatrix of the SAM and LAM modes.