— || June 10, 1999 || Catalina || CSS || APO || align=right data-sort-value="0.65" | 650 m || |-id=410 bgcolor=#d6d6d6 | 53410 || || — || June 14, 1999 || Socorro || LINEAR || URS || align=right | 7.9 km || |-id=411 bgcolor=#E9E9E9 | 53411 || || — || June 6, 1999 || Anderson Mesa || LONEOS || EUN || align=right | 4.5 km || |-id=412 bgcolor=#E9E9E9 | 53412 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 11 km || |-id=413 bgcolor=#d6d6d6 | 53413 || || — || July 13, 1999 || Socorro || LINEAR || — || align=right | 7.5 km || |-id=414 bgcolor=#d6d6d6 | 53414 || || — || July 14, 1999 || Socorro || LINEAR || — || align=right | 8.6 km || |-id=415 bgcolor=#d6d6d6 | 53415 || || — || July 14, 1999 || Socorro || LINEAR || EUP || align=right | 10 km || |-id=416 bgcolor=#d6d6d6 | 53416 || || — || July 14, 1999 || Socorro || LINEAR || — || align=right | 8.1 km || |-id=417 bgcolor=#fefefe | 53417 || || — || July 14, 1999 || Socorro || LINEAR || H || align=right | 2.0 km || |-id=418 bgcolor=#C2FFFF | 53418 || || — || August 13, 1999 || Anderson Mesa || LONEOS || L5 || align=right | 25 km || |-id=419 bgcolor=#C2FFFF | 53419 || || — || August 13, 1999 || Anderson Mesa || LONEOS || L5 || align=right | 22 km || |-id=420 bgcolor=#d6d6d6 | 53420 || || — || September 5, 1999 || Catalina || CSS || EOS || align=right | 7.5 km || |-id=421 bgcolor=#fefefe | 53421 || || — || September 7, 1999 || Socorro || LINEAR || H || align=right | 1.6 km || |-id=422 bgcolor=#fefefe | 53422 || || — || September 8, 1999 || Socorro || LINEAR || H || align=right | 1.5 km || |-id=423 bgcolor=#d6d6d6 | 53423 || || — || September 8, 1999 || Catalina || CSS || — || align=right | 6.4 km || |-id=424 bgcolor=#fefefe | 53424 || || — || September 24, 1999 || Socorro || LINEAR || H || align=right | 2.5 km || |-id=425 bgcolor=#fefefe | 53425 || || — || September 29, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 3.9 km || |-id=426 bgcolor=#FFC2E0 | 53426 || || — || September