In this note the ECE2 gravitational field potential relations of UFT318 and UFT319 are used to derive the equations of the planar orbit, Eqs. (27) and (28) in the presence of an aether momentum (5) defined by the gravitational vector potential Q bold. This appears in the ECE2 gravitational field equations but not in Newtonian gravitation. This aether momentum can result in zero gravitation according to Eq. (33) and also in counter gravitation, as first discussed in UFT318 and UFT319. Eqs. (27), (28), (31) and (32) are four simultaneous differential equations in four unknowns, and can be solved with Maxima. Counter gravitation can be induced with an electric field as discussed in UFT318. The presence of the aether momentum implies the existence of a gravitomagnetic field, so the full scope of the ECE2 gravitational field equations is being implemented. I will write up UFT378 now and in UFT379 apply the theory to a gyroscope inside a Faraday cage.