|| align=right | 3.1 km || |-id=497 bgcolor=#E9E9E9 | 12497 Ekkehard || || || March 26, 1998 || Caussols || ODAS || — || align=right | 4.5 km || |-id=498 bgcolor=#E9E9E9 | 12498 Dragesco || || || March 26, 1998 || Caussols || ODAS || — || align=right | 4.2 km || |-id=499 bgcolor=#fefefe | 12499 || || — || March 20, 1998 || Socorro || LINEAR || FLO || align=right | 4.6 km || |-id=500 bgcolor=#fefefe | 12500 Desngai || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 2.7 km || |} 12501–12600 |-bgcolor=#fefefe | 12501 Nord || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=502 bgcolor=#fefefe | 12502 || || — || March 20, 1998 || Socorro || LINEAR || NYS || align=right | 2.8 km || |-id=503 bgcolor=#E9E9E9 | 12503 || || — || March 24, 1998 || Socorro || LINEAR || GEF || align=right | 4.3 km || |-id=504 bgcolor=#fefefe | 12504 Nuest || || || March 24, 1998 || Socorro || LINEAR || — || align=right | 3.9 km || |-id=505 bgcolor=#fefefe | 12505 || || — || March 24, 1998 || Socorro || LINEAR || FLO || align=right | 3.6 km || |-id=506 bgcolor=#fefefe | 12506 Pariser || || || March 31, 1998 || Socorro || LINEAR || — || align=right | 3.5 km || |-id=507 bgcolor=#E9E9E9 | 12507 || || — || March 31, 1998 || Socorro || LINEAR || DOR || align=right | 12 km || |-id=508 bgcolor=#fefefe | 12508 || || — || March 31, 1998 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=509 bgcolor=#fefefe | 12509 Pathak || || || March 31, 1998 || Socorro || LINEAR || FLO || align=right | 2.3 km || |-id=510 bgcolor=#fefefe | 12510 || || — || March 20, 1998 || Socorro || LINEAR || — || align=right | 3.2 km || |-id=511 bgcolor=#fefefe | 12511 Patil || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 5.5 km || |-id=512 bgcolor=#fefefe | 12512 Split || || || April 21, 1998 || Višnjan Observatory || K. Korlević, M. Dusić || FLO || align=right | 4.6 km || |-id=513 bgcolor=#fefefe | 12513 Niven || || || April 27, 1998 || Prescott || P. G. Comba || — || align=right