Notes. For each star we present their estimated mass M_* in solar masses, minimum distance d_min between a comet and a star in parsecs, an epoch T_min of this approach in Myrs and a relative velocity V_rel in km s⁻¹. Parameter γ = M_*/(d_min · V_rel) is the theoretical approximate measure of the stellar perturbation strength but the actual perturbation also strongly depends on the geometry of the encounter.