On a geometric method for determining the nonperturbed orbit from observations using the transformation groups.
Abstract
The transformation groups of phase trajectories of threedimensional twobody problem are considered. These groups are used for development of geometric ("angle only" observations) method of orbit determination. The equations for orbit plane determination are given.
 Publication:

Kinematika i Fizika Nebesnykh Tel
 Pub Date:
 August 1987
 Bibcode:
 1987KFNT....3...26T
 Keywords:

 Celestial Mechanics;
 Orbit Calculation;
 Two Body Problem;
 Phase Deviation;
 Trajectory Analysis;
 Transformations (Mathematics);
 Vector Analysis;
 Astrophysics;
 Orbits:TwoBody Problem;
 TwoBody Problem:Orbits;
 TwoBody Problem:Trajectories