Elliptical,
1 being parabolic, and greater than
1 being hyperbolic.
The eccentricity of an elliptical orbit is:
Where *e*is the eccentricity*r*is the radius at_{a}**apoapsis**(furthest distance)*r*is the radius at_{p}**periapsis**(closest distance)
Earth's orbit has an eccentricity of 0.0167. The Moon's is 0.0549. orbits,celestial mechanics,measure)Referenced by:
Apsis DQ Tau Hill Radius Kozai Mechanism Libration Moon Orbital Element Precession Laplace Radius (r _{L})
Semi-Major Axis ( a)
Titan |