21843

21843 is a minor planet in the asteroid belt, located between the orbits of Mars and Jupiter. It was discovered on October 24, 1999, by the Lowell Observatory Near-Earth-Object Search (LONEOS) at Anderson Mesa Station. The asteroid is approximately 3.5 kilometers in diameter and has an orbital period of about 3.6 Earth years. Its orbit is moderately inclined to the ecliptic plane, with an inclination of 10.6 degrees. The asteroid's rotation period is approximately 5.5 hours. 21843 is classified as a main-belt asteroid, a group of asteroids that orbit the Sun primarily between Mars and Jupiter. It is not known to have any moons or to be part of any known asteroid family. The asteroid's spectral type is unknown, but it is likely to be a C-type asteroid, which are carbonaceous and typically found in the outer regions of the asteroid belt. The asteroid's name is not yet assigned, and it is currently known by its provisional designation, 21843.