|| || — || March 3, 2000 || Catalina || CSS || — || align=right | 7.2 km || |-id=553 bgcolor=#E9E9E9 | 50553 || || — || March 3, 2000 || Catalina || CSS || — || align=right | 3.0 km || |-id=554 bgcolor=#d6d6d6 | 50554 || || — || March 8, 2000 || Kitt Peak || Spacewatch || slow || align=right | 5.7 km || |-id=555 bgcolor=#d6d6d6 | 50555 || || — || March 8, 2000 || Kitt Peak || Spacewatch || — || align=right | 4.1 km || |-id=556 bgcolor=#E9E9E9 | 50556 || || — || March 8, 2000 || Kitt Peak || Spacewatch || — || align=right | 6.2 km || |-id=557 bgcolor=#fefefe | 50557 || || — || March 8, 2000 || Kitt Peak || Spacewatch || MAS || align=right | 2.0 km || |-id=558 bgcolor=#fefefe | 50558 || || — || March 4, 2000 || Uccle || E. W. Elst, D. Taeymans || — || align=right | 3.5 km || |-id=559 bgcolor=#E9E9E9 | 50559 || || — || March 3, 2000 || Socorro || LINEAR || — || align=right | 2.2 km || |-id=560 bgcolor=#E9E9E9 | 50560 || || — || March 4, 2000 || Socorro || LINEAR || — || align=right | 6.9 km || |-id=561 bgcolor=#E9E9E9 | 50561 || || — || March 5, 2000 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=562 bgcolor=#fefefe | 50562 || || — || March 5, 2000 || Socorro || LINEAR || V || align=right | 2.8 km || |-id=563 bgcolor=#fefefe | 50563 || || — || March 5, 2000 || Socorro || LINEAR || V || align=right | 2.3 km || |-id=564 bgcolor=#E9E9E9 | 50564 || || — || March 8, 2000 || Socorro || LINEAR || HEN || align=right | 4.2 km || |-id=565 bgcolor=#d6d6d6 | 50565 || || — || March 8, 2000 || Socorro || LINEAR || KOR || align=right | 3.6 km || |-id=566 bgcolor=#d6d6d6 | 50566 || || — || March 8, 2000 || Socorro || LINEAR || EOS || align=right | 7.2 km || |-id=567 bgcolor=#E9E9E9 | 50567 || || — || March 8, 2000 || Socorro || LINEAR || — || align=right | 7.4 km || |-id=568 bgcolor=#E9E9E9 | 50568 || || — || March 8, 2000 || Socorro || LINEAR || — || align=right | 3.2 km || |-id=569 bgcolor=#d6d6d6 | 50569 ||