NUMERICAL COMPUTATION OF HANSEN-LIKE EXPANSIONS

Fourier expansions of elliptic motion functions in multiples of the tr ue, eccentric, elliptic and mean anomalies are computed numerically by means of the fast Fourier transform. Both Hansen-like coefficients an d their derivatives with respect to eccentricity of the orbit are cons idered. General behavior of the coefficients and the efficiency (compa ctness) of the expansions are investigated for various values of eccen tricity of the orbit.