2001 AV43

 is a very small, monolithic asteroid and fast rotator, classified as a near-Earth object of the Apollo group, approximately 30 m in diameter. It was first observed on 5 January 2001, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The presumed S-type asteroid has a rotation period of only 10 minutes. It has an exceptionally low MOID of 0.66 lunar distance (LD) and will approach Earth at 0.81 LD on 11 November 2029.

Orbit and classification
is a member of the dynamical Apollo group, which are Earth-crossing asteroids. Apollo asteroids are the largest subgroup of near-Earth objects. Unlike many Apollo asteroids, this asteroid is not a Mars-crosser, as its aphelion is smaller than the orbit of the Red Planet at 1.66 AU.

This asteroid orbits the Sun at a distance of 0.97–1.59 AU once every 17 months (531 days; semi-major axis of 1.28 AU). Its orbit has an eccentricity of 0.24 and an inclination of 0° with respect to the ecliptic. The body's observation arc begins with a precovery found in ESO's Astrovirtel data archive, in August 2000, less than 5 months prior to its official discovery observation at Socorro.

Close approaches
has an Earth minimum orbital intersection distance of 0.0017 AU, which translates into 0.7 lunar distances (LD). Due to its small size, that is, an absolute magnitude fainter than 22, this asteroid is not classified as a potentially hazardous asteroid.

On 18 November 2013, the asteroid passed Earth at 2.7 LD. The angle of approach made it a good target for radar observations.

On 11 November 2029, the orbit of is predicted to bring the asteroid within a nominal distance of 0.00209 AU or 0.81 LD of Earth. It will also pass the Moon at an even shorter nominal distance of 0.00166 AU

Physical characteristics
is an assumed stony S-type asteroid.

Rotation period
A rotational lightcurve of was obtained from photometric observations by American astronomers Robert J. Whiteley, Carl Hergenrother and David Tholen. Lightcurve analysis gave a rotation period of 0.1701 hours (612 second) with a brightness amplitude of 0.26 magnitude (U=2). With such a short period, it is a notable fast rotator. The observers classified it as a "monolithic fast-rotating asteroid" (MFRA).

Diameter and albedo
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 0.03 kilometers based on an absolute magnitude of 24.9.

Numbering and naming
As of 2018, this minor planet has neither been numbered nor named.