AAS 95-306

Vƒ Leveraging for Interplanetary Missions: Multiple - Revolution Orbit Techniques

J. A. Sims, J. M. Longuski and A. J. Staugler, Purdue University, West Lafayette, IN

Abstract

The term Vƒ leveraging refers to the use of a relatively small deep-space maneuver to modify the Vƒ at a body. This maneuver, in conjunction with a gravity assist at the body, reduces the launch energy requirements and total V for a mission. A typical example of Vƒ leveraging is the V-EGA trajectory introduced by Hollenbeck. In this paper the concept is generalized to include multiple revolutions of both the spacecraft and the gravity-assist body. Analytic results predict the existence of low launch energy trajectories to asteroids and Mercury. Numerical results confirm these predictions.