Classification for the radial component of particles motion in the field   of a super-extremely charged object
  A method for investigation of neutral test particles motion with the angular momentum L in the Reissner-Nordstr\"om field of a super-extremely charged object with mass M and charge Q > M is proposed. The problem of classifying the radial component of motion is reduced to working up a classification for "effective" potential types and subsequent consideration of trajectories for each of these types. 
Valentin D. Gladush, Dmitry A. Kulikov
gr-qc