 The orbit of 2018 CY2 before and after flyby on 14 February 2018 | |
| Discovery [1][2] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 9 February 2018 (first observed only) |
| Designations | |
| 2018 CY2 | |
| NEO · Apollo [3][1] | |
| Orbital characteristics [3] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 7 | |
| Observation arc | 5 days |
| Aphelion | 1.3360 AU |
| Perihelion | 0.9211 AU |
| 1.1285 AU | |
| Eccentricity | 0.1838 |
| 1.20 yr (438 days) | |
| 338.04° | |
| 0° 49m 19.56s / day | |
| Inclination | 26.503° |
| 144.03° | |
| 73.482° | |
| Earth MOID | 0.0451 AU · 17.6 LD |
| Physical characteristics | |
| 59–190 m[4] 100 m (est. at 0.20)[5] 190 m (est. at 0.057)[5] | |
| 22.33[3] | |
2018 CY2 is an asteroid, classified as a near-Earth object of the Apollo group, with an estimated diameter of 59–190 metres (190–620 ft). It was first observed on 9 February 2018, by astronomers of the Catalina Sky Survey at Mount Lemmon Observatory, Arizona, during its close approach to Earth.[1][2]
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