This question came up when I was studying for my PhD, and had access to software with built in solar-centric planetary locations. From what I recall, across the

This question came up when I was studying for my PhD, and had access to software with built in solar-centric planetary locations. From what I recall, across the full-range of time available in the software (which was something like 300 years) it did apply that the Mercury-[PLANET] distance was minimal, although possibly not for Pluto since 300 years is only like one-and-a-quarter orbits.