10343

10343 is a minor planet in the asteroid belt, orbiting the Sun between Mars and Jupiter. It was discovered on October 29, 1989, by astronomers Eleanor Helin and Kenneth Lawrence at the Palomar Observatory in California, United States. The asteroid is approximately 10 kilometers in diameter and has a rotation period of about 5.6 hours. It is classified as a main-belt asteroid, with a semi-major axis of 2.67 astronomical units (AU) and an orbital period of 4.38 years. The orbital eccentricity of 10343 is 0.16, and its orbital inclination is 14.5 degrees relative to the ecliptic. The asteroid's absolute magnitude is 12.6, indicating its brightness. 10343 has not been named, and it is designated by its provisional designation 1989 UH3.