12AR is a large rocky asteroid composed mainly of iron and silica, orbiting KM-56.
KM12 is supposed to intercept this comet on 63.0. It will gain valuable information on the Cassetta group of asteroids in the system. 12AR is the second largest of the Cassetta group, runner-up to asteroid, Cassetta.
12AR has a slightly inclined orbit, and a moderately eccentric one.