15, 1999 || Višnjan Observatory || K. Korlević || EUN || align=right | 5.4 km || |-id=270 bgcolor=#d6d6d6 | 28270 || || — || February 15, 1999 || Višnjan Observatory || K. Korlević || KOR || align=right | 4.8 km || |-id=271 bgcolor=#d6d6d6 | 28271 || || — || February 6, 1999 || Višnjan Observatory || K. Korlević || KAR || align=right | 3.6 km || |-id=272 bgcolor=#fefefe | 28272 Mikejanner || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 3.2 km || |-id=273 bgcolor=#E9E9E9 | 28273 Maianhvu || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=274 bgcolor=#E9E9E9 | 28274 || || — || February 10, 1999 || Socorro || LINEAR || EUN || align=right | 3.9 km || |-id=275 bgcolor=#d6d6d6 | 28275 Quoc-Bao || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 7.9 km || |-id=276 bgcolor=#fefefe | 28276 Filipnaiser || || || February 10, 1999 || Socorro || LINEAR || NYS || align=right | 2.1 km || |-id=277 bgcolor=#fefefe | 28277 Chengherngyi || || || February 10, 1999 || Socorro || LINEAR || V || align=right | 2.9 km || |-id=278 bgcolor=#d6d6d6 | 28278 || || — || February 10, 1999 || Socorro || LINEAR || EOS || align=right | 6.6 km || |-id=279 bgcolor=#d6d6d6 | 28279 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 15 km || |-id=280 bgcolor=#fefefe | 28280 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=281 bgcolor=#E9E9E9 | 28281 || || — || February 10, 1999 || Socorro || LINEAR || EUN || align=right | 10 km || |-id=282 bgcolor=#d6d6d6 | 28282 || || — || February 10, 1999 || Socorro || LINEAR || EOS || align=right | 9.2 km || |-id=283 bgcolor=#d6d6d6 | 28283 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 7.5 km || |-id=284 bgcolor=#E9E9E9 | 28284 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 7.5 km || |-id=285 bgcolor=#E9E9E9 | 28285 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 4.9 km || |-id=286 bgcolor=#E9E9E9 | 28286 || || — || February 10, 1999 ||