article: List of minor planets: 21001–22000
links: Observatoire de Haute-Provence Eric Walter Elst Karl Schwarzschild Observatory Eugene M. Shoemaker Socorro, NM Palomar Observatory Carolyn S. Shoemaker Kitt Peak National Observatory Spacewatch Reedy Creek Observatory Caussols La Silla Observatory Schelte J. Bus Amor asteroid High Point, NC Lincoln Near-Earth Asteroid Research Near-Earth Asteroid Tracking Siding Spring Observatory Okutama, Tokyo