|Discovery site||Mount Lemmon Obs.|
|Discovery date||7 February 2018|
|NEO · Apollo|
|Epoch 23 March 2018 (JD 2458200.5)|
|Uncertainty parameter 7|
|Observation arc||2 days|
|2.49 yr (910 days)|
|0° 23m 44.52s / day|
|Earth MOID||0.00077 AU (0.30 LD)|
7 m (est. at 0.20)
14 m (est. at 0.057)
2018 CF2 is a micro-asteroid and near-Earth object of the Apollo group on an eccentric orbit with has an estimated 4–15 meters (10–50 ft). It was first observed on 7 February 2018, by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory, Arizona, United States. The discovery occurred the day after its sub-lunar passage as it approached the Earth from a sunward direction, and this flyby altered the asteroid's orbit slightly.
Based on a high uncertainty, it orbits the Sun at a distance of 0.91–2.77 AU once every 2 years and 6 months (910 days; semi-major axis of 1.84 AU). Its orbit has an eccentricity of 0.51 and an inclination of 16° with respect to the ecliptic. With an aphelion of 2.77 AU, it is also a Mars-crosser, as it crosses the orbit of the Red Planet at 1.666 AU. The body's observation arc begins at Mount Lemmon with its first observation on 7 February 2018.
On 6 February 2018, 18:45 UTC, the day before its first observation, it had a flyby with the Earth at a nominal distance of 0.25 lunar distances (LD). Its next close approach to Earth is projected to occur on 23 January 2023, at 0.111 AU (43 LD). After the 2018-passage, the body's minimum orbital intersection distance with Earth increased to 0.30 LD (0.00077 AU).
The Minor Planet Center estimates a diameter of 4–15 meters (10–50 ft). Based on a generic magnitude-to-diameter conversion using an absolute magnitude of 28.036, the body measures between 7 and 14 meters in diameter for an assumed albedo of 0.057 and 0.20, which represent typical values for carbonaceous and stony asteroids, respectively.
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