2011 UN63

2011 UN₆₃
Discovery
Discovered by	Mt. Lemmon Survey
Discovery date	21 October 2011
Designations
MPC designation	2011 UN₆₃
Minor planet category	Martian L5
Orbital characteristics
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 1
Observation arc	1587 days (4.34 yr)
Aphelion	1.6222522 AU (242.68547 Gm)
Perihelion	1.4253677 AU (213.23197 Gm)
Semi-major axis	1.5238099 AU (227.95872 Gm)
Eccentricity	0.0646027
Orbital period (sidereal)	1.88 yr (687.06 d)
Mean anomaly	101.29418°
Mean motion	0° 31^m 26.298^s / day
Inclination	20.36086°
Longitude of ascending node	223.55542°
Argument of perihelion	165.28918°
Earth MOID	0.434823 AU (65.0486 Gm)
Jupiter MOID	3.54877 AU (530.888 Gm)
Physical characteristics
Dimensions	560 m
Geometric albedo	0.5–0.05 (assumed)
Absolute magnitude (H)	19.7

2011 UN₆₃, also written as 2011 UN63, is a Mars trojan, an asteroid orbiting near the L₅ point of Mars (60 degrees behind Mars on its orbit).