Distribution of 1∕a_ori for small-perihelion LPCs (q < 3.1 au) with determinable NG orbits. Upper panel: shape of the Oort spike for preferred NG orbits; 78 comets were included. For comparison, the 1∕a_ori distribution using purely GR orbits is presented in the lower panel. Light green distributions in both panels represent the sample of comets with GR orbits of class 2 or lower. The positions of some comets with hyperbolic original orbits are labeled.