The PROCYON probe developed by JAXA and the University of Tokyo was intended to flyby this asteroid before its ion thruster failed and could not be restarted.

[14] Confirming observations were obtained with the Arecibo telescope from September 30 to October 7, 2000.

[1] The 800-meter-diameter primary and the 300-meter-diameter secondary orbit each other with a separation of 2.6 kilometers and a period of 1.76 days.

[16] The primary is spheroidal and is spinning at a rate near the breakup point for strengthless bodies.

The primary has a low density of 1.7 g/cm3, which may indicate a "rubble pile" structure containing rocks and voids.