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Observational Constraints on Planet Nine: Cassini Range Observations

Holman, Matthew J.; Payne, Matthew J.

We examine the tidal perturbations induced by a possible additional, distant planet in the solar system on the distance between the Earth and the Cassini spacecraft. We find that measured range residuals alone can significantly constrain the sky position, distance, and mass of the perturbing planet to sections of the sky essentially orthogonal to …