12, 1999 || Socorro || LINEAR || — || align=right | 11 km || |-id=390 bgcolor=#fefefe | 28390 Demjohopkins || || || May 13, 1999 || Socorro || LINEAR || FLO || align=right | 2.4 km || |-id=391 bgcolor=#d6d6d6 | 28391 || || — || June 9, 1999 || Socorro || LINEAR || — || align=right | 14 km || |-id=392 bgcolor=#E9E9E9 | 28392 || || — || July 13, 1999 || Socorro || LINEAR || — || align=right | 4.5 km || |-id=393 bgcolor=#d6d6d6 | 28393 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 8.4 km || |-id=394 bgcolor=#E9E9E9 | 28394 Mittag-Leffler || || || September 13, 1999 || Prescott || P. G. Comba || — || align=right | 4.8 km || |-id=395 bgcolor=#E9E9E9 | 28395 || || — || September 3, 1999 || Siding Spring || R. H. McNaught || — || align=right | 7.1 km || |-id=396 bgcolor=#fefefe | 28396 Eymann || || || September 13, 1999 || Guitalens || A. Klotz || V || align=right | 1.9 km || |-id=397 bgcolor=#fefefe | 28397 Forrestbetton || || || September 7, 1999 || Socorro || LINEAR || V || align=right | 2.0 km || |-id=398 bgcolor=#E9E9E9 | 28398 Ericthomas || || || September 7, 1999 || Socorro || LINEAR || — || align=right | 2.7 km || |-id=399 bgcolor=#d6d6d6 | 28399 || || — || September 9, 1999 || Socorro || LINEAR || EOS || align=right | 5.3 km || |-id=400 bgcolor=#d6d6d6 | 28400 Morgansinko || || || September 9, 1999 || Socorro || LINEAR || — || align=right | 5.1 km || |} 28401–28500 |-bgcolor=#d6d6d6 | 28401 || || — || September 9, 1999 || Socorro || LINEAR || — || align=right | 11 km || |-id=402 bgcolor=#fefefe | 28402 Matthewkim || || || September 8, 1999 || Socorro || LINEAR || V || align=right | 2.2 km || |-id=403 bgcolor=#E9E9E9 | 28403 || 1999 TY || — || October 1, 1999 || Višnjan Observatory || K. Korlević || GER || align=right | 5.7 km || |-id=404 bgcolor=#E9E9E9 | 28404 || || — || October 1, 1999 || Višnjan Observatory || K. Korlević, M. Jurić || — || align=right | 6.2 km || |-id=405 bgcolor=#fefefe | 28405 || || — || October 10, 1999 || Oohira || T. Urata || FLO || align=right | 2.6 km || |-id=406 bgcolor=#d6d6d6