2011 UB256

2011 UB₂₅₆
Discovery
Discovered by	Pan-STARRS
Discovery date	29 October 2011
Designations
MPC designation	2011 UB₂₅₆
Minor planet category	Martian L5
Orbital characteristics
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc	6265 days (17.15 yr)
Aphelion	1.631894031 AU (244.1278722 Gm)
Perihelion	1.4154896 AU (211.75423 Gm)
Semi-major axis	1.523691798 AU (227.9410486 Gm)
Eccentricity	0.0710132
Orbital period (sidereal)	1.88 yr (686.980044 d)
Mean anomaly	180.60444°
Mean motion	0° 31^m 26.518^s /day
Inclination	24.30270°
Longitude of ascending node	58.781126°
Argument of perihelion	7.58178°
Earth MOID	0.428887 AU (64.1606 Gm)
Jupiter MOID	3.5641 AU (533.18 Gm)
Physical characteristics
Mean diameter	300 m
Geometric albedo	0.5-0.05 (assumed)
Absolute magnitude (H)	19.9

2011 UB₂₅₆ is a small asteroid and Mars trojan orbiting near the L₅ point of Mars (60 degrees behind Mars on its orbit).