Quasi-satellite dynamical state and orbital evolution
(15810) 1994 JR1 is currently following a quasi-satellite loop around Pluto. In contrast with the cases of 2002 VE68 or (309239) 2007 RW10, the quasi-satellite state of (15810) 1994 JR1 is mainly the result of resonances with Neptune not caused by a discrete close encounter with another body. This dynamical behavior is recurrent, the object becomes a Plutonian quasi-satellite every 2 Myr and remains in that phase for nearly 350,000 years.
(15810) 1994 JR1 is moving in a very stable orbit, likely as stable as Pluto's. This suggests that it may be a primordial plutino formed around the same time Pluto itself and Charon came into existence. It is unlikely to be relatively recent debris originated in collisions within Pluto’s system or a captured object.
(15810) 1994 JR1 is currently a relatively close neighbor of Pluto's. In 2017, it will be only 2.7 AU from Pluto. It is currently the best known target for a flyby by the New Horizons spacecraft after its Pluto flyby in 2015, but it is hoped that still better targets will be found by then.