| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 26 July 1998 |
| Designations | |
| (85640) 1998 OX4 | |
| MPO 267962 | |
| Orbital characteristics[1][2][3] | |
| 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) |
| 1.580280132 AU (236.4065429 Gm) | |
| Eccentricity | 0.4857608 |
| 1.99 yr (725.60 d) | |
| 227.77555° | |
| 0° 29m 46.099s / day | |
| Inclination | 4.5134807° |
| 299.70814° | |
| 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][4] |
| 21.1[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.