|| — || September 8, 1999 || Socorro || LINEAR || — || align=right | 7.4 km || |-id=548 bgcolor=#E9E9E9 | 91548 || || — || September 8, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=549 bgcolor=#d6d6d6 | 91549 || || — || September 8, 1999 || Socorro || LINEAR || 627 || align=right | 8.4 km || |-id=550 bgcolor=#d6d6d6 | 91550 || || — || September 8, 1999 || Socorro || LINEAR || — || align=right | 7.7 km || |-id=551 bgcolor=#d6d6d6 | 91551 || || — || September 8, 1999 || Socorro || LINEAR || — || align=right | 10 km || |-id=552 bgcolor=#d6d6d6 | 91552 || || — || September 8, 1999 || Bergisch Gladbach || W. Bickel || — || align=right | 3.5 km || |-id=553 bgcolor=#d6d6d6 | 91553 Claudedoom || || || September 8, 1999 || Observatoire Royal de Belgique, Uccle || T. Pauwels || KOR || align=right | 2.2 km || |-id=554 bgcolor=#C2E0FF | 91554 || || — || September 8, 1999 || Mauna Kea || J. X. Luu, C. Trujillo, D. C. Jewitt || SDO || align=right | 122 km || |-id=555 bgcolor=#d6d6d6 | 91555 || || — || September 5, 1999 || Kitt Peak || Spacewatch || KOR || align=right | 3.1 km || |-id=556 bgcolor=#E9E9E9 | 91556 || || — || September 5, 1999 || Catalina || CSS || — || align=right | 5.5 km || |-id=557 bgcolor=#E9E9E9 | 91557 || || — || September 7, 1999 || Catalina || CSS || GEF || align=right | 2.7 km || |-id=558 bgcolor=#d6d6d6 | 91558 || || — || September 4, 1999 || Catalina || CSS || — || align=right | 5.8 km || |-id=559 bgcolor=#E9E9E9 | 91559 || || — || September 4, 1999 || Kitt Peak || Spacewatch || — || align=right | 2.2 km || |-id=560 bgcolor=#d6d6d6 | 91560 || || — || September 5, 1999 || Catalina || CSS || — || align=right | 5.5 km || |-id=561 bgcolor=#E9E9E9 | 91561 || || — || September 8, 1999 || Catalina || CSS || — || align=right | 5.5 km || |-id=562 bgcolor=#E9E9E9 | 91562 || || — || September 9, 1999 || Anderson Mesa || LONEOS || — || align=right | 4.0 km || |-id=563 bgcolor=#d6d6d6 | 91563 || || — || September 8, 1999 || Catalina || CSS || EMA || align=right