|| — || align=right | 3.5 km || |-id=426 bgcolor=#d6d6d6 | 40426 || || — || September 7, 1999 || Socorro || LINEAR || HYG || align=right | 7.5 km || |-id=427 bgcolor=#d6d6d6 | 40427 || || — || September 7, 1999 || Socorro || LINEAR || 629 || align=right | 3.4 km || |-id=428 bgcolor=#E9E9E9 | 40428 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 5.9 km || |-id=429 bgcolor=#E9E9E9 | 40429 || || — || September 7, 1999 || Višnjan Observatory || K. Korlević || EUN || align=right | 9.3 km || |-id=430 bgcolor=#FA8072 | 40430 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 1.7 km || |-id=431 bgcolor=#fefefe | 40431 || || — || September 8, 1999 || Socorro || LINEAR || PHO || align=right | 3.4 km || |-id=432 bgcolor=#E9E9E9 | 40432 || || — || September 8, 1999 || Socorro || LINEAR || — || align=right | 7.4 km || |-id=433 bgcolor=#E9E9E9 | 40433 || || — || September 8, 1999 || Socorro || LINEAR || PAL || align=right | 4.6 km || |-id=434 bgcolor=#E9E9E9 | 40434 || || — || September 9, 1999 || Višnjan Observatory || K. Korlević || GEF || align=right | 3.5 km || |-id=435 bgcolor=#d6d6d6 | 40435 || || — || September 9, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 5.9 km || |-id=436 bgcolor=#E9E9E9 | 40436 Sylviecoyaud || || || September 10, 1999 || Campo Catino || Campo Catino Obs. || — || align=right | 5.8 km || |-id=437 bgcolor=#d6d6d6 | 40437 || || — || September 6, 1999 || Farpoint || G. Bell, G. Hug || — || align=right | 5.7 km || |-id=438 bgcolor=#d6d6d6 | 40438 || || — || September 6, 1999 || Farpoint || G. Bell, G. Hug || KOR || align=right | 3.9 km || |-id=439 bgcolor=#d6d6d6 | 40439 || || — || September 9, 1999 || Višnjan Observatory || K. Korlević || THM || align=right | 8.7 km || |-id=440 bgcolor=#d6d6d6 | 40440 Dobrovský || || || September 11, 1999 || Ondřejov || P. Pravec, P. Kušnirák || EOS || align=right | 4.8 km || |-id=441 bgcolor=#E9E9E9 | 40441 Jungmann || || || September 11, 1999 || Ondřejov || P. Pravec, P. Kušnirák || — || align=right | 3.1 km || |-id=442