It was first observed on 7 October 2005, by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory in the Atacama desert of Chile.
[2][3] It was the third such body to be discovered, and the first with a significant orbital inclination, which showed that the population as a whole is very dynamically excited.
These Trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years).
[6] Based on a generic magnitude-to-diameter conversion, it measures approximately 68 kilometers in diameter using an absolute magnitude of 9.0 and an assumed albedo of 0.10.
[5] Due to its orbital uncertainty, this minor planet has not been numbered and its official discoverers have not been determined.