|-id=489 bgcolor=#fefefe | 59489 || || — || May 8, 1999 || Catalina || CSS || V || align=right | 3.4 km || |-id=490 bgcolor=#FA8072 | 59490 || || — || May 10, 1999 || Socorro || LINEAR || PHO || align=right | 3.3 km || |-id=491 bgcolor=#fefefe | 59491 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 2.8 km || |-id=492 bgcolor=#E9E9E9 | 59492 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 4.1 km || |-id=493 bgcolor=#fefefe | 59493 || || — || May 10, 1999 || Socorro || LINEAR || H || align=right | 2.7 km || |-id=494 bgcolor=#E9E9E9 | 59494 || || — || May 10, 1999 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=495 bgcolor=#E9E9E9 | 59495 || || — || May 6, 1999 || Majorca || Á. López J., R. Pacheco || — || align=right | 4.1 km || |-id=496 bgcolor=#fefefe | 59496 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 2.3 km || |-id=497 bgcolor=#E9E9E9 | 59497 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 3.7 km || |-id=498 bgcolor=#fefefe | 59498 || || — || May 12, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=499 bgcolor=#E9E9E9 | 59499 || || — || May 14, 1999 || Catalina || CSS || — || align=right | 6.7 km || |-id=500 bgcolor=#E9E9E9 | 59500 || || — || May 14, 1999 || Reedy Creek || J. Broughton || — || align=right | 2.1 km || |} 59501–59600 |-bgcolor=#E9E9E9 | 59501 || || — || May 7, 1999 || Catalina || CSS || — || align=right | 7.0 km || |-id=502 bgcolor=#E9E9E9 | 59502 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 2.6 km || |-id=503 bgcolor=#E9E9E9 | 59503 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 3.1 km || |-id=504 bgcolor=#d6d6d6 | 59504 || || — || May 8, 1999 || Catalina || CSS || EOS || align=right | 5.4 km || |-id=505 bgcolor=#E9E9E9 | 59505 || || — || May 9, 1999 || Catalina || CSS || — || align=right | 7.1 km || |-id=506 bgcolor=#E9E9E9