(687170) 2011 QF99 is a minor planet from the outer Solar System and the first known Uranus trojan to be discovered.

It measures approximately 60 kilometers (37 miles) in diameter, assuming an albedo of 0.05.

[3][4] It was first observed 29 August 2011 during a deep survey of trans-Neptunian objects conducted with the Canada–France–Hawaii Telescope, but its identification as Uranian trojan was not announced until 2013.

[3][6] Uranus trojans are generally expected to be unstable and none of them are thought to be of primordial origin.

A simulation led to the conclusion that at any given time, 0.4% of the centaurs in the scattered population within 34 AU would be Uranus co-orbitals, of which 64% (0.256% of all centaurs) would be in horseshoe orbits, 10% (0.04%) would be quasi-satellites, and 26% (0.104%) would be trojans (evenly split between the L4 and L5 groups).