(85640) 1998 OX4

(85640) 1998 OX₄
Discovery
Discovered by	Spacewatch
Discovery site	Kitt Peak National Obs.
Discovery date	26 July 1998
Designations
MPC designation	(85640) 1998 OX₄
Alternative designations	MPO 267962
Minor planet category	NEO Apollo PHA Mars crosser
Orbital characteristics
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	3656 days (10.01 yr)
Aphelion	2.347918212 AU (351.2435651 Gm)
Perihelion	0.81264205 AU (121.569520 Gm)
Semi-major axis	1.580280132 AU (236.4065429 Gm)
Eccentricity	0.4857608
Orbital period (sidereal)	1.99 yr (725.60 d)
Mean anomaly	227.77555°
Mean motion	0° 29^m 46.099^s / day
Inclination	4.5134807°
Longitude of ascending node	299.70814°
Argument of perihelion	117.10906°
Earth MOID	0.00103632 AU (155,031 km)
Jupiter MOID	3.03959 AU (454.716 Gm)
Physical characteristics
Dimensions	300–600 m^[a]
Absolute magnitude (H)	21.1

(85640) 1998 OX₄ (provisional designation 1998 OX₄) is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group.