|| align=right | 2.5 km || |-id=445 bgcolor=#fefefe | 20445 || || — || May 12, 1999 || Socorro || LINEAR || — || align=right | 6.5 km || |-id=446 bgcolor=#FA8072 | 20446 || || — || May 14, 1999 || Socorro || LINEAR || — || align=right | 4.8 km || |-id=447 bgcolor=#E9E9E9 | 20447 || || — || May 15, 1999 || Socorro || LINEAR || MIT || align=right | 8.0 km || |-id=448 bgcolor=#E9E9E9 | 20448 || || — || May 12, 1999 || Socorro || LINEAR || EUN || align=right | 3.0 km || |-id=449 bgcolor=#fefefe | 20449 || || — || May 13, 1999 || Socorro || LINEAR || NYS || align=right | 2.8 km || |-id=450 bgcolor=#fefefe | 20450 Marymohammed || || || May 13, 1999 || Socorro || LINEAR || FLO || align=right | 2.0 km || |-id=451 bgcolor=#fefefe | 20451 Galeotti || || || May 15, 1999 || Anderson Mesa || LONEOS || — || align=right | 3.5 km || |-id=452 bgcolor=#fefefe | 20452 || || — || May 20, 1999 || Socorro || LINEAR || — || align=right | 4.4 km || |-id=453 bgcolor=#fefefe | 20453 || || — || May 24, 1999 || Socorro || LINEAR || PHO || align=right | 3.1 km || |-id=454 bgcolor=#fefefe | 20454 Pedrajo || || || June 9, 1999 || Socorro || LINEAR || V || align=right | 2.7 km || |-id=455 bgcolor=#fefefe | 20455 Pennell || || || June 9, 1999 || Socorro || LINEAR || V || align=right | 2.8 km || |-id=456 bgcolor=#d6d6d6 | 20456 || || — || June 8, 1999 || Kitt Peak || Spacewatch || — || align=right | 7.7 km || |-id=457 bgcolor=#E9E9E9 | 20457 || || — || June 10, 1999 || Woomera || F. B. Zoltowski || — || align=right | 4.6 km || |-id=458 bgcolor=#fefefe | 20458 || || — || June 9, 1999 || Socorro || LINEAR || — || align=right | 3.5 km || |-id=459 bgcolor=#E9E9E9 | 20459 || || — || June 9, 1999 || Socorro || LINEAR || — || align=right | 4.4 km || |-id=460 bgcolor=#FFC2E0 | 20460 Robwhiteley || || || June 13, 1999 || CSS || CSS || AMO +1km || align=right | 2.7 km || |-id=461 bgcolor=#C7FF8F | 20461 Dioretsa || || || June 8, 1999 || Socorro || LINEAR || damocloidunusualcritical || align=right | 7.7