The Kuiper Belt is considered to be formed by remnants of the original Solar System, that is why exploration missions to that region are susceptible of having an enormous scientific impact. Nonetheless, it is far away from Earth, missions to KBO targets a significant challenge. Additionally, current methods to identify trajectories that encounter multiple KBOs are computationally intensive with impractically long run times on the order of months.

The present work deals with applying a rapid low-fidelity technique to identify candidate preliminary KBO sequences, to be used as a starting point for futuremission designers to identify trajectories tomultiple KBOs. This pathfinding approach uses two consecutive grid search types.

First, awell-tuned grid search is implemented using Lambert arcs to reach a first KBO, including the introduction of a new, systematic approach to identify the step sizes in target-body arrival date for the Lambert-based grid search. Then, second and third KBO encounters are assessed from the results of the first grid search and second KBO search respectively. Both second and third KBO searches are performed with a new algorithm consisting of a time grid along with STM linear propagation for maneuver calculation. Finally, an example trajectory resulting from this technique that encounters two KBOs is given as a potential flyable route.