Socorro || LINEAR || — || align=right | 5.7 km || |-id=398 bgcolor=#fefefe | 50398 || || — || February 6, 2000 || Socorro || LINEAR || — || align=right | 2.1 km || |-id=399 bgcolor=#E9E9E9 | 50399 || || — || February 2, 2000 || Socorro || LINEAR || — || align=right | 6.4 km || |-id=400 bgcolor=#E9E9E9 | 50400 || || — || February 2, 2000 || Socorro || LINEAR || — || align=right | 2.7 km || |} 50401–50500 |-bgcolor=#fefefe | 50401 || || — || February 5, 2000 || Catalina || CSS || — || align=right | 2.7 km || |-id=402 bgcolor=#E9E9E9 | 50402 || || — || February 6, 2000 || Catalina || CSS || — || align=right | 4.0 km || |-id=403 bgcolor=#fefefe | 50403 || || — || February 15, 2000 || Socorro || LINEAR || PHO || align=right | 6.6 km || |-id=404 bgcolor=#d6d6d6 | 50404 || || — || February 2, 2000 || Catalina || CSS || EOS || align=right | 5.2 km || |-id=405 bgcolor=#fefefe | 50405 || || — || February 2, 2000 || Catalina || CSS || V || align=right | 1.7 km || |-id=406 bgcolor=#E9E9E9 | 50406 || || — || February 3, 2000 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=407 bgcolor=#d6d6d6 | 50407 || || — || February 3, 2000 || Socorro || LINEAR || KOR || align=right | 3.2 km || |-id=408 bgcolor=#E9E9E9 | 50408 || || — || February 3, 2000 || Socorro || LINEAR || — || align=right | 3.9 km || |-id=409 bgcolor=#E9E9E9 | 50409 || || — || February 3, 2000 || Socorro || LINEAR || — || align=right | 3.8 km || |-id=410 bgcolor=#E9E9E9 | 50410 || || — || February 4, 2000 || Socorro || LINEAR || — || align=right | 4.5 km || |-id=411 bgcolor=#d6d6d6 | 50411 || 2000 DS || — || February 24, 2000 || Oizumi || T. Kobayashi || — || align=right | 12 km || |-id=412 bgcolor=#E9E9E9 | 50412 Ewen || || || February 26, 2000 || Rock Finder || W. K. Y. Yeung || HEN || align=right | 5.5 km || |-id=413 bgcolor=#E9E9E9 | 50413 Petrginz || || || February 27, 2000 || Kleť || J. Tichá, M. Tichý || GEF || align=right | 3.3 km || |-id=414 bgcolor=#d6d6d6 | 50414 || || — || February 26,