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Exoplanet imaging missions utilizing an external occulter (starshade) forstarlight suppression require precise alignment between the telescope andstarshade, necessitating maintenance of the starshade orbit duringobservations. Differential lateral acceleration between the two spacecraftserves as a proxy for fuel use and number of required interruptions to theobservation. Comparison against results from high fidelity simulations ofstationkeeping validates the use of this easy-to-compute proxy. Among starshadepositions constrained to the surface of a sphere centered about the telescope,minima of differential lateral acceleration lie on a great circle and itscorresponding poles. We present a closed expression for telescope to starvectors requiring minimal stationkeeping for observation from a telescope at anarbitrary position

Minimal Differential Lateral Acceleration Configurations for Starshade Stationkeeping in Exoplanet Direct Imaging