2018 CY2
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.
The orbit of 2018 CY2 before and after flyby on 14 February 2018 | |
| Discovery | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 9 February 2018 (first observed only) |
| Designations | |
MPC designation | 2018 CY2 |
Minor planet category | NEO · Apollo |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 7 | |
| Observation arc | 5 days |
| Aphelion | 1.3360 AU |
| Perihelion | 0.9211 AU |
Semi-major axis | 1.1285 AU |
| Eccentricity | 0.1838 |
Orbital period (sidereal) | 1.20 yr (438 days) |
Mean anomaly | 338.04° |
Mean motion | 0° 49m 19.56s / day |
| Inclination | 26.503° |
Longitude of ascending node | 144.03° |
| 73.482° | |
| Earth MOID | 0.0451 AU · 17.6 LD |
| Physical characteristics | |
Mean diameter | 59–190 m 100 m (est. at 0.20) 190 m (est. at 0.057) |
| 22.33 | |
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