Dependence of the Hubble flow fit on the minimum distance from the barycentre for the minor (left column) and major infall models (right column). The first and third rows have M 81 as the centre of mass. The second and fourth row use the barycentre located on the connection line between M 81 and M 82. The first and second row use v_hel. The third and fourth row use v_LG. For the major infall model, velocities up to a maximum value of 700 km/s were included in the fit.