4065 Meinel, provisional designation 2820 P-L, is an asteroid from the inner regions of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 24 September 1960, by Dutch astronomer couple Ingrid and Cornelis van Houten on photographic plates taken by Dutch–American astronomer Tom Gehrels at Palomar Observatory, California.^[4] The asteroid was named for American astronomer Aden Meinel.^[2]

The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt.^{[citation needed]} It orbits the Sun in the inner main-belt at a distance of 2.1–2.4 AU once every 3 years and 5 months (1,247 days). Its orbit has an eccentricity of 0.08 and an inclination of 5° with respect to the ecliptic.^[1] A first precovery was taken at the discovering observatory in 1953, extending Meinel's observation arc by 7 years prior to its discovery.^[4]

This minor planet was named in honor of the American physicist and astronomer Aden Meinel (1922–2011).^[2] The official naming citation was published by the Minor Planet Center on 18 February 1992 (M.P.C. 19695).^[7]