Orbit concepts
Circular velocity: velocity required to maintain a circular orbit.
- Slower: object falls into an elliptical orbit
- Faster: the object rises into an elliptical orbit
Newtons version of Kepler’s 3rd law.
- P2 = 4p2a3/(G(m1+m2))
- (m1+m2) P2 =a3
- for m in solar masses, P in years, a in astronomical units