5335 Damocles
When Damocles was found, in 1991 by Robert H. McNaught, it was found to be on an orbit that was very different from all others known. Damocles' orbit reached from inside the aphelion (farthest approach from the Sun) of Mars to as far as Uranus. Its orbit seemed to be changing from an almost round outer solar system orbit to a stretched orbit taking it to the inner solar system. Duncan Steel, Gerhard Hahn, Mark Bailey, and David Asher found out what's it's future could be, and found a good chance that it will become an Earth-crosser asteroid, and may spend a quarter of its life in such an orbit. Damocles has a stable orbit for tens of thousands of years before and after the present, because its highly tilted orbit does not take it near Jupiter or Saturn.