| 3.7 km || |-id=479 bgcolor=#fefefe | 20479 Celisaucier || || || July 14, 1999 || Socorro || LINEAR || — || align=right | 3.5 km || |-id=480 bgcolor=#fefefe | 20480 Antonschraut || || || July 14, 1999 || Socorro || LINEAR || MAS || align=right | 3.2 km || |-id=481 bgcolor=#fefefe | 20481 Sharples || || || July 14, 1999 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=482 bgcolor=#fefefe | 20482 Dustinshea || || || July 14, 1999 || Socorro || LINEAR || NYS || align=right | 2.9 km || |-id=483 bgcolor=#fefefe | 20483 Sinay || || || July 14, 1999 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=484 bgcolor=#E9E9E9 | 20484 Janetsong || || || July 14, 1999 || Socorro || LINEAR || — || align=right | 4.2 km || |-id=485 bgcolor=#E9E9E9 | 20485 || || — || July 12, 1999 || Socorro || LINEAR || EUN || align=right | 4.3 km || |-id=486 bgcolor=#E9E9E9 | 20486 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 6.7 km || |-id=487 bgcolor=#E9E9E9 | 20487 || || — || July 13, 1999 || Socorro || LINEAR || — || align=right | 4.6 km || |-id=488 bgcolor=#E9E9E9 | 20488 Pic-du-Midi || 1999 OL || || July 17, 1999 || Pises || Pises Obs. || — || align=right | 7.9 km || |-id=489 bgcolor=#E9E9E9 | 20489 || || — || July 22, 1999 || Socorro || LINEAR || EUN || align=right | 6.9 km || |-id=490 bgcolor=#E9E9E9 | 20490 || || — || July 22, 1999 || Socorro || LINEAR || HNS || align=right | 7.8 km || |-id=491 bgcolor=#fefefe | 20491 Ericstrege || || || July 16, 1999 || Socorro || LINEAR || — || align=right | 2.9 km || |-id=492 bgcolor=#E9E9E9 | 20492 || || — || July 16, 1999 || Socorro || LINEAR || — || align=right | 5.1 km || |-id=493 bgcolor=#E9E9E9 | 20493 || || — || July 16, 1999 || Socorro || LINEAR || — || align=right | 9.1 km || |-id=494 bgcolor=#E9E9E9 | 20494 || || — || August 3, 1999 || Siding Spring || R. H. McNaught || BRU || align=right | 8.7 km || |-id=495 bgcolor=#E9E9E9 | 20495 Rimavská Sobota || || || August 15, 1999 || Ondřejov || P. Pravec, P. Kušnirák || — ||