Osculating eccentricities and inclinations of the trans-Neptunian region at 20 Myr. Neptune undergoes disc migration from 39 to 21 au and 27 au, and at 20 Myr it almost reaches its final position at about 30 au following Eq. (1). We notice that in the deep21 case, the degree of excitation of the belt is larger and, for example, the red objects that reach higher eccentricity are scattered when they become Neptune’s crossers. In the deep27 case, red objects do not reach enough eccentricity to be scattered around. Resonances (and Neptune’s position) are slightly shifted even if snapshots are taken at the same time because the displacement of the outward migration is different in the two cases and therefore so is the rate of outward migration.