Elliptical orbit
An elliptical or elliptic orbit was an orbit were a smaller object moved around a larger object in an oval-shaped path, such as an object found in a geosynchronous orbit.

In the late 2020s, during the Europa Mission, the Shango X-1 was in an elliptical orbit around Jupiter as it studied the environment of Europa. ()

When the  approached Terra 10, Captain James T. Kirk had the ship set for a single elliptic orbit. ()

Vandor IV was detected to be "a planetoid in elliptical orbit around the binary system." ()

Debris from the Earth shuttle Charybdis was discovered in an elliptical orbit above Theta VIII in 2365. () 

In 2371, the quantum singularity from a cloaked Romulan  warbird was detected orbiting Deep Space 9 in a "roughly elliptical fashion". The station's crew was able to track the singularity by using its tetryon emissions as a guide, and found that at certain points in its orbit, the singularity radiated temporal energy at a specific wavelength that caused Miles O'Brien to experience random time shifts into the future. ()

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Physics
Astronomy