2018 CN2
2018 CN2 is a very small asteroid, classified as a near-Earth object of the Apollo group, approximately 5 to 16 meters in diameter. It was first observed by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, on 8 February 2018, one day prior its close encounter with Earth at 0.18 lunar distances.
The orbit before and after flyby, with positions on 1 February 2018, before flyby | |
| Discovery | |
|---|---|
| Discovered by | Mount Lemmon Srvy. |
| Discovery site | Mount Lemon Obs. |
| Discovery date | 8 February 2018 (first observed only) |
| Designations | |
MPC designation | 2018 CN2 |
Minor planet category | NEO · Apollo Earth- and Mars crosser |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 7 | |
| Observation arc | 1 day |
| Aphelion | 1.7740 AU |
| Perihelion | 0.6335 AU |
Semi-major axis | 1.2037 AU |
| Eccentricity | 0.4738 |
Orbital period (sidereal) | 1.32 yr (482 days) |
Mean anomaly | 348.58° |
Mean motion | 0° 44m 46.68s / day |
| Inclination | 25.741° |
Longitude of ascending node | 320.21° |
| 276.55° | |
| Earth MOID | 7.7×10−5 AU (0.03 LD) |
| Physical characteristics | |
Mean diameter | 5–16 m 9 m (est. at 0.20) 17 m (est. at 0.057) |
| 27.653 | |
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