Is my understanding correct that all planets and moons in Orbiter move along certain modeled paths (eg, VSOP87) and all vessels' motion is determined by the computed gravitational forces?
Is my understanding correct that all planets and moons in Orbiter move along certain modeled paths (eg, VSOP87) and all vessels' motion is determined by the computed gravitational forces?
You can choose a dynamic model in the config, AFAIK. They tend to be somewhat prone to getting ejected from the system at high time acceleration, though. I think for custom bodies it's best to just stick it to the orbital parameters. I never looked into how you'd go about building an actual ephemeris...
That's interesting if it's better (in various aspects) to use the predetermined (for a quite big time interval) trajectories of all celestial bodies or calculate them every time during the simulation session.