12 km || |-id=239 bgcolor=#E9E9E9 | 53239 || || — || February 11, 1999 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=240 bgcolor=#E9E9E9 | 53240 || || — || February 11, 1999 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=241 bgcolor=#E9E9E9 | 53241 || || — || February 11, 1999 || Socorro || LINEAR || EUN || align=right | 3.3 km || |-id=242 bgcolor=#E9E9E9 | 53242 || || — || February 11, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.4 km || |-id=243 bgcolor=#E9E9E9 | 53243 || || — || February 9, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=244 bgcolor=#E9E9E9 | 53244 || || — || February 8, 1999 || Kitt Peak || Spacewatch || — || align=right | 5.5 km || |-id=245 bgcolor=#d6d6d6 | 53245 || || — || February 12, 1999 || Kitt Peak || Spacewatch || — || align=right | 4.5 km || |-id=246 bgcolor=#E9E9E9 | 53246 || || — || February 18, 1999 || Haleakala || NEAT || — || align=right | 3.0 km || |-id=247 bgcolor=#E9E9E9 | 53247 || || — || February 17, 1999 || Reedy Creek || J. Broughton || EUN || align=right | 5.6 km || |-id=248 bgcolor=#d6d6d6 | 53248 || || — || February 21, 1999 || Oizumi || T. Kobayashi || — || align=right | 5.3 km || |-id=249 bgcolor=#E9E9E9 | 53249 || || — || February 20, 1999 || Prescott || P. G. Comba || MRX || align=right | 2.4 km || |-id=250 bgcolor=#d6d6d6 | 53250 Beucher || || || February 20, 1999 || Goodricke-Pigott || R. A. Tucker || — || align=right | 5.8 km || |-id=251 bgcolor=#d6d6d6 | 53251 || || — || March 12, 1999 || Kitt Peak || Spacewatch || EOS || align=right | 4.2 km || |-id=252 bgcolor=#E9E9E9 | 53252 Sardegna || || || March 13, 1999 || Gnosca || S. Sposetti || — || align=right | 6.5 km || |-id=253 bgcolor=#E9E9E9 | 53253 Zeiler || || || March 13, 1999 || Goodricke-Pigott || R. A. Tucker || HEN || align=right | 3.9 km || |-id=254 bgcolor=#d6d6d6 | 53254 || || — || March 14, 1999 || Kitt Peak || Spacewatch || EOS || align=right | 3.4 km || |-id=255 bgcolor=#d6d6d6 | 53255 || || — || March 14, 1999 || Kitt