Triton has a very unusual orbit that is circular but retrograde and inclination.

Due to its unusual orbit and rapid variation in brightness, there was early speculation that it could be a man-made or even extraterrestrial object.

Only two facts were known about Rama - its unusual orbit, and its approximate size.

Because of this unusual orbit, it is sometimes referenced as "Earth's second satellite".

Asteroids with unusual orbits also offer a lot to the imagination.

The Trust declares that the order has no legal force, because simply adopting an unusual orbit poses no threat, nor has one been spoken.

Triton Triton's unusual orbit is an important clue about its past.

Analysis of its unusual orbit shows that it may come very close to Earth soon.

This started a pattern of female names for main-belt bodies and male names for those with unusual orbits.

Pluto has the most unusual orbit of all the planets.