The sum of the virial masses of A2384N and A2384S as a function of the projection angle α. The horizontal lines show the mass value (full line) and errors (dashed lines) as estimated in Sect. 6.4. The projected distance of 1.14 Mpc and the radial velocity difference at rest of 1000 km s^-1 were derived from the two BCGs positions and velocities. It is assumed that the two systems are 1.0 Gyr after the first passage. The dotted line represents the Newtonian criterion for gravitational binding. One unbound outgoing (UO) is found compatible with our mass estimates.