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.^[1] 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.

2018 CF₂ belongs to the Apollo asteroids, the largest group of near-Earth objects with nearly 10 thousand known members, which cross the orbit of Earth.

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.^[2] 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.^[1]

The Minor Planet Center estimates a diameter of 4–15 meters (10–50 ft).^[3] Based on a generic magnitude-to-diameter conversion using an absolute magnitude of 28.036,^[2] 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.^[4]

As of 2018, no rotational lightcurve of 2018 CF₂ has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.^[2]

This minor planet has not yet been numbered.^[1]

• List of asteroid close approaches to Earth in 2018
• Gravity assist