The search for L5 trojans of Neptune has been impeded by the fact that this region of space is currently along the line of sight to the center of the Milky Way, an area of the sky crowded with stars. 2008 LC18 was found in a location where background stars are obscured by a dust cloud. The discovery of one Neptune L5 trojan in a searched area of 19 square degrees suggests that there may be 150 Neptune L5 trojans with a diameter greater than ~80 km (24th magnitude), similar to the estimate of such objects in Neptune's L4 swarm.
2008 LC18 was not close enough for investigation by the New Horizons spacecraft when it crossed Neptune's L5 region en route to Pluto in 2013–2014, but its discovery showed that other, more accessible Neptune trojans could potentially have been found before that time.2008 LC18 was 2 AU from Pluto in 1997.2008 LC18 crossed the ecliptic plane in 2011. As of 2016[update], it is 33 AU from Neptune.