|| Socorro || LINEAR || — || align=right | 4.5 km || |-id=392 bgcolor=#E9E9E9 | 40392 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 4.9 km || |-id=393 bgcolor=#E9E9E9 | 40393 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 2.9 km || |-id=394 bgcolor=#E9E9E9 | 40394 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 3.2 km || |-id=395 bgcolor=#fefefe | 40395 || || — || July 12, 1999 || Socorro || LINEAR || KLI || align=right | 4.2 km || |-id=396 bgcolor=#E9E9E9 | 40396 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 3.4 km || |-id=397 bgcolor=#E9E9E9 | 40397 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 4.6 km || |-id=398 bgcolor=#fefefe | 40398 || || — || July 13, 1999 || Socorro || LINEAR || — || align=right | 7.2 km || |-id=399 bgcolor=#fefefe | 40399 || || — || July 14, 1999 || Socorro || LINEAR || FLO || align=right | 2.9 km || |-id=400 bgcolor=#d6d6d6 | 40400 || || — || July 14, 1999 || Socorro || LINEAR || — || align=right | 5.1 km || |} 40401–40500 |-bgcolor=#fefefe | 40401 || || — || July 14, 1999 || Socorro || LINEAR || V || align=right | 2.1 km || |-id=402 bgcolor=#fefefe | 40402 || || — || July 14, 1999 || Socorro || LINEAR || — || align=right | 2.4 km || |-id=403 bgcolor=#fefefe | 40403 || || — || July 12, 1999 || Socorro || LINEAR || — || align=right | 3.4 km || |-id=404 bgcolor=#fefefe | 40404 || 1999 OB || — || July 16, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 3.6 km || |-id=405 bgcolor=#E9E9E9 | 40405 || 1999 OU || — || July 17, 1999 || Bergisch Gladbach || W. Bickel || MRX || align=right | 2.6 km || |-id=406 bgcolor=#fefefe | 40406 || || — || July 16, 1999 || Socorro || LINEAR || V || align=right | 2.5 km || |-id=407 bgcolor=#fefefe | 40407 || || — || August 31, 1999 || Oohira || T. Urata || SUL || align=right | 3.9 km || |-id=408 bgcolor=#fefefe | 40408 || || — || September 4,