a) Bullets (•) show the spin axis orientation as determined with the SPC method (Fig. 2). Small dots (·) are the spin vector orientation for a simulated body with inertia moments equal to those derived from the shape of 67P assuming homogeneity, and an E_l = 1.9 × 10^-6 under case 1 circumstances. These data are displayed with a time separation of 1 h. Diamonds (◆), to be compared with the bullet distribution, correspond to the orientation of the spin axis for the simulation performed at the time and date associated with each determination made with the SPC method. To locate the diamonds, neither noise nor averaging have been included. b) Lomb periodogram of the Dec-simulated coordinates (diamonds) shown in Fig. 5a. The RA coordinate periodogram is exactly the same as that of the Dec data, only small differences in spectral power (height of the peak) can be appreciated.