Back 2010 WC9 Basque 2010 WC9 French 2010 WC9 ID 2010 WC9 MIN 2010 WC9 Russian 2010 WC9 Sundanese 2010 WC9 Chinese
 Orbit of 2010 WC9 with positions before 2018 flyby | |
| Discovery[1] | |
|---|---|
| Discovered by | Catalina Sky Srvy. |
| Discovery site | Catalina Stn. (first observed only) |
| Discovery date | 30 November 2010 |
| Designations | |
| 2010 WC9 | |
| ZJ99C60[2][3] | |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 7.45 yr (2,721 d) |
| Aphelion | 1.3797 AU |
| Perihelion | 0.7784 AU |
| 1.0791 AU | |
| Eccentricity | 0.2786 |
| 1.12 yr (409 d) | |
| 251.06° | |
| 0° 52m 45.48s / day | |
| Inclination | 17.994° |
| 54.655° | |
| 273.53° | |
| Earth MOID | 0.00138 AU (0.5454 LD) |
| Venus MOID | 0.158 AU (23,600,000 km)[1] |
| Physical characteristics | |
| 8–20 minutes | |
| 23.5[4] | |
2010 WC9, unofficially designated ZJ99C60, is a sub-kilometer near-Earth asteroid of the Apollo group, approximately 100 meters (330 feet) in diameter. First observed for eleven days by the Catalina Sky Survey in 2010, the asteroid was recovered in May 2018 during its sub-lunar close encounter with Earth.[4]
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