Universal formulation for the perturbed two-body problem

@inproceedings{Zadunaisky1990UniversalFF,
  title={Universal formulation for the perturbed two-body problem},
  author={Pedro E. Zadunaisky and Claudia M. Giordano},
  year={1990}
}
The theory and applications of the uniform treatment of Kepler motion are extended to the case where a known perturbing force is present. The cases where the perturbing force is either coplanar or noncoplanar with the instantaneous plane of motion of the perturbed body are considered. In several applications, the accuracy and efficiency of this extended method for the calculation of ephemerides of the perturbed body are shown.