  An implementation of the ideal frame formulation of perturbed Keplerian
motion is presented which only requires the integration of a differential
system of dimension 7, contrary to the 8 variables traditionally integrated
with this approach. The new formulation is based on the integration of a scaled
version of the Eulerian set of redundant parameters, and slightly improves
runtime performance with respect to the 8 dimensional case while retaining
comparable accuracy.
