Orr-Om was an urban center in orbit above the planet Duro, classified as a city-ship.
In the course of the Yuuzhan Vong War, the Yuuzhan Vong, an extra-galactic species, attacked Orr-Om using a bio-engineered serpentine creature referred to as the Ychna. While Jedi Knight Anakin Solo succeeded in eliminating the Ychna, Orr-Om was already doomed, plummeting to the surface of Duro. Like many other orbital cities, it was forced out of its orbit through the usage of dovin basals.