km || |-id=272 bgcolor=#d6d6d6 | 53272 || || — || March 19, 1999 || Socorro || LINEAR || THB || align=right | 11 km || |-id=273 bgcolor=#d6d6d6 | 53273 || || — || March 19, 1999 || Socorro || LINEAR || EOS || align=right | 7.2 km || |-id=274 bgcolor=#E9E9E9 | 53274 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=275 bgcolor=#d6d6d6 | 53275 || || — || March 19, 1999 || Socorro || LINEAR || CHA || align=right | 5.6 km || |-id=276 bgcolor=#E9E9E9 | 53276 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 6.5 km || |-id=277 bgcolor=#E9E9E9 | 53277 || || — || March 24, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 6.1 km || |-id=278 bgcolor=#E9E9E9 | 53278 || || — || March 19, 1999 || Socorro || LINEAR || DOR || align=right | 6.2 km || |-id=279 bgcolor=#E9E9E9 | 53279 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 4.3 km || |-id=280 bgcolor=#E9E9E9 | 53280 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 5.8 km || |-id=281 bgcolor=#E9E9E9 | 53281 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 8.3 km || |-id=282 bgcolor=#E9E9E9 | 53282 || || — || March 19, 1999 || Socorro || LINEAR || — || align=right | 4.7 km || |-id=283 bgcolor=#E9E9E9 | 53283 || || — || March 20, 1999 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=284 bgcolor=#E9E9E9 | 53284 || || — || March 20, 1999 || Socorro || LINEAR || RAF || align=right | 5.1 km || |-id=285 bgcolor=#d6d6d6 | 53285 Mojmír || || || March 24, 1999 || Ondřejov || Ondřejov Obs. || — || align=right | 7.2 km || |-id=286 bgcolor=#E9E9E9 | 53286 || || — || March 20, 1999 || Socorro || LINEAR || MAR || align=right | 4.1 km || |-id=287 bgcolor=#d6d6d6 | 53287 || 1999 GR || — || April 5, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 6.7 km || |-id=288 bgcolor=#d6d6d6 | 53288 || || — || April 6, 1999 || Kitt Peak || Spacewatch || KOR || align=right | 4.9 km