User:T.Randall.Scales/Astrodynamics

Ref

Kepler orbit: F=G(m1m2/r^2)

Equations of motion

Specific orbital energy

Orbital period

Orbital_speed: v=2pi(a/T) : v^2=u/a

Escape velocity: =(2u/r)^0.5

G = Gravitational constant 6.67e-11 m^3 kg^-1 s^-2

F = Force

m, m1, m2: mass

v = velocity

u = GM = Standard gravitational parameter

r = Radius