2002 RN109 is a trans-Neptunian astronomical object and damocloid on a highly eccentric, cometary-like orbit.
It was first observed on 6 September 2002, by astronomers of the Lincoln Near-Earth Asteroid Research project at its ETS near Socorro, New Mexico, United States.
In the past it may have made closer approaches to the Sun that could have removed most near-surface volatiles.
2002 RN109 belongs to the dynamical group of damocloids due to its low Tisserand parameter (TJupiter of 1.0820).
The object has the seventh-largest heliocentric semi-major axis and aphelion of all known minor planets, while its extreme eccentricity brings it well within the orbit of Jupiter when at perihelion.