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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The Three-body Problem
From: Dave Walden
Date: 2021 Oct 27, 04:37 -0700
From: Dave Walden
Date: 2021 Oct 27, 04:37 -0700
The JPL DE430 ephemeris used for the Nautical Almanac doesn't approximate a 3 body problem. It includes the interactions of over 350 bodies. All the planets plus largests asteroids. It calculates interactions based on physics and then time steps. New versions of the DE series include all new data from ground based position obervations, spacecraft tracking data, and laser and radar ranging data. It reflects planet shape effects, relativistic effects and others. See for example:
https://ipnpr.jpl.nasa.gov/progress_report/42-196/196C.pdf
