| 59506 || || — || May 9, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 4.4 km || |-id=507 bgcolor=#E9E9E9 | 59507 || || — || May 14, 1999 || Catalina || CSS || MAR || align=right | 4.2 km || |-id=508 bgcolor=#fefefe | 59508 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=509 bgcolor=#E9E9E9 | 59509 || || — || May 10, 1999 || Socorro || LINEAR || EUN || align=right | 2.5 km || |-id=510 bgcolor=#E9E9E9 | 59510 || || — || May 10, 1999 || Socorro || LINEAR || BRU || align=right | 6.4 km || |-id=511 bgcolor=#E9E9E9 | 59511 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 5.6 km || |-id=512 bgcolor=#E9E9E9 | 59512 || || — || May 10, 1999 || Socorro || LINEAR || MAR || align=right | 2.8 km || |-id=513 bgcolor=#E9E9E9 | 59513 || || — || May 10, 1999 || Socorro || LINEAR || WIT || align=right | 3.1 km || |-id=514 bgcolor=#fefefe | 59514 || || — || May 12, 1999 || Socorro || LINEAR || — || align=right | 2.0 km || |-id=515 bgcolor=#E9E9E9 | 59515 || || — || May 15, 1999 || Catalina || CSS || — || align=right | 6.2 km || |-id=516 bgcolor=#E9E9E9 | 59516 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 3.8 km || |-id=517 bgcolor=#E9E9E9 | 59517 || || — || May 15, 1999 || Kitt Peak || Spacewatch || — || align=right | 4.3 km || |-id=518 bgcolor=#fefefe | 59518 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 7.2 km || |-id=519 bgcolor=#E9E9E9 | 59519 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 2.2 km || |-id=520 bgcolor=#fefefe | 59520 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=521 bgcolor=#fefefe | 59521 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 2.4 km || |-id=522 bgcolor=#fefefe | 59522 || || — || May 10, 1999 || Socorro || LINEAR || V || align=right | 3.7 km || |-id=523 bgcolor=#E9E9E9 | 59523 || || — ||