Hi Hi,

Thanks for this wonderful program. I'm new to the field, and taking a quick course in celestial mechanics

I want to know how to use gravsim to observe (and measure) the precession of the perihelion of a planet, typically, Mercury.

I suppose I have to zoom in close to Mercury's orbit, take note of the values of the classical orbital elements near perihelion, and after that compute the perihelion using an external tool, but I'm not sure if there's an easier way.

If I do that for each orbit, I should be able to observe the precession of the perihelion, right?

And that precession would not include the relativistic effect, right?

Any suggestions? what tools/formulas can you recommend me to use?

Thanks,

Mauro