List of Whirligig World stability problems with Principia

List of Whirligig World stability problems with Principia

* Aerious' orbit is chaotic, but it never actually leaves Tyepolbynar's sphere of influence or flies by the other moons. (This seems to be similar to RetroBop)

* Statmun fails if the J2 (oblateness of the gravitational field) for mesbin is high. Statmun works perfectly fine if Mesbin's J2 is 0.

* Troymin, supposed trojan of Kerbmun, orbiting Mesbin, gets its eccentricity increased until it flies by Kerbmun. Kerbmun's orbit does not seem to change as much as Troymin's does leading up to the flyby, which leads me to suspect it might be a problem with how the trojan is set up and not a problem with perturbations from Derbin, but I'm not sure. I would really like to preserve Troymin as a Kerbmun Trojan as best as possible, even if that means moving Kerbmun, but it's possible there's a better solution involving tweaking Kerbmun's orbit.

* Ollym's orbit around Lowel is unstable. Due to Lowel's inclined orbit around the nearby red dwarf Gememma, Ollym's inclination and eventually inclination gets significantly pumped up until Ollym crashes into Lowel. (And then it continues to evolve because principia doesn't collide planets) This appears to be a real instability, not an integration problem. I suspect the only solution is to reduce the inclination of Ollym with respect to Lowel's orbit, which will of course destroy the unique axial tilt and equatorial ice belt of Lowel.

* Mandrake and Rutherford's minor moons, despite being a Pluto/Charon/Moons clone in mass ratios and orbit ratios, will fall apart quickly. I suspect there is probably a way to fix the resonance since it should be identical to the one in real life.


Other Principia Problems/To-Do

* Etrograd, Egad, and Yeerbor have lost their retrograde rotation periods. This will have to be fixed when I add axial tilt.

* Need to add axial tilts.