What are oscillations equations without gravitation equations?
Potential Energy= -Gm1m2/r
Total energy for a circular orbit= (-Gm1m2)/(2R)
Total energy for elliptical orbit= (-Gm1m2)/(2a) ; a= major axis radius
Velocity/Radius relationship for elliptical orbits: vprp=vara
Overall, there aren't too many equations to remember for this topic. But, all of the equations are very similar. So, memorize!