Abstract:

An algorithm for close approach determination was developed by Alfano and Negron (1993) based on polynomial splining techniques. The local minimum relative distances and the corresponding times, as well as the time when one space object enters and exits in the ellipsoidal region of another one are determined by solving the roots of the polynomials. However, in A-N algorithm there are limitations in the criteria used to check root existence and the process of filtrating rational real roots.

Key words: space , object,  , close , approach,  , ellipsoidal , region,  , orbit , mechanics