Peak || Spacewatch || — || align=right | 10 km || |-id=256 bgcolor=#E9E9E9 | 53256 Sinitiere || 1999 FD || || March 16, 1999 || Baton Rouge || W. R. Cooney Jr. || — || align=right | 3.8 km || |-id=257 bgcolor=#d6d6d6 | 53257 || 1999 FF || — || March 16, 1999 || Baton Rouge || W. R. Cooney Jr. || KOR || align=right | 4.8 km || |-id=258 bgcolor=#E9E9E9 | 53258 || 1999 FN || — || March 17, 1999 || Caussols || ODAS || EUN || align=right | 4.3 km || |-id=259 bgcolor=#d6d6d6 | 53259 || || — || March 16, 1999 || Kitt Peak || Spacewatch || EOS || align=right | 3.8 km || |-id=260 bgcolor=#d6d6d6 | 53260 || || — || March 16, 1999 || Kitt Peak || Spacewatch || HYG || align=right | 6.4 km || |-id=261 bgcolor=#d6d6d6 | 53261 || || — || March 17, 1999 || Kitt Peak || Spacewatch || KOR || align=right | 3.1 km || |-id=262 bgcolor=#E9E9E9 | 53262 || || — || March 16, 1999 || Caussols || ODAS || — || align=right | 2.4 km || |-id=263 bgcolor=#d6d6d6 | 53263 || || — || March 25, 1999 || Ondřejov || L. Kotková || EMA || align=right | 10 km || |-id=264 bgcolor=#E9E9E9 | 53264 || || — || March 20, 1999 || Socorro || LINEAR || — || align=right | 5.7 km || |-id=265 bgcolor=#d6d6d6 | 53265 || || — || March 17, 1999 || Kitt Peak || Spacewatch || — || align=right | 7.8 km || |-id=266 bgcolor=#d6d6d6 | 53266 || || — || March 18, 1999 || Kitt Peak || Spacewatch || — || align=right | 5.1 km || |-id=267 bgcolor=#E9E9E9 | 53267 || || — || March 23, 1999 || Kitt Peak || Spacewatch || — || align=right | 6.3 km || |-id=268 bgcolor=#d6d6d6 | 53268 || || — || March 22, 1999 || Anderson Mesa || LONEOS || — || align=right | 7.5 km || |-id=269 bgcolor=#E9E9E9 | 53269 || || — || March 22, 1999 || Anderson Mesa || LONEOS || — || align=right | 3.5 km || |-id=270 bgcolor=#E9E9E9 | 53270 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 4.2 km || |-id=271 bgcolor=#E9E9E9 | 53271 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 5.2