km || |-id=550 bgcolor=#fefefe | 178550 || || — || November 4, 1999 || Socorro || LINEAR || — || align=right | 1.6 km || |-id=551 bgcolor=#FA8072 | 178551 || || — || November 4, 1999 || Socorro || LINEAR || H || align=right | 1.0 km || |-id=552 bgcolor=#fefefe | 178552 || || — || November 5, 1999 || Socorro || LINEAR || FLO || align=right | 1.2 km || |-id=553 bgcolor=#fefefe | 178553 || || — || November 9, 1999 || Socorro || LINEAR || — || align=right | 1.0 km || |-id=554 bgcolor=#fefefe | 178554 || || — || November 9, 1999 || Socorro || LINEAR || — || align=right | 1.3 km || |-id=555 bgcolor=#d6d6d6 | 178555 || || — || November 6, 1999 || Kitt Peak || Spacewatch || THM || align=right | 3.9 km || |-id=556 bgcolor=#fefefe | 178556 || || — || November 9, 1999 || Kitt Peak || Spacewatch || MAS || align=right | 1.2 km || |-id=557 bgcolor=#fefefe | 178557 || || — || November 9, 1999 || Socorro || LINEAR || PHO || align=right | 1.7 km || |-id=558 bgcolor=#E9E9E9 | 178558 || || — || November 9, 1999 || Socorro || LINEAR || — || align=right | 1.8 km || |-id=559 bgcolor=#fefefe | 178559 || || — || November 11, 1999 || Catalina || CSS || — || align=right | 1.2 km || |-id=560 bgcolor=#fefefe | 178560 || || — || November 11, 1999 || Catalina || CSS || ERI || align=right | 2.5 km || |-id=561 bgcolor=#fefefe | 178561 || || — || November 14, 1999 || Socorro || LINEAR || — || align=right | 1.2 km || |-id=562 bgcolor=#E9E9E9 | 178562 || || — || November 14, 1999 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=563 bgcolor=#fefefe | 178563 || || — || November 14, 1999 || Socorro || LINEAR || MAS || align=right | 1.00 km || |-id=564 bgcolor=#fefefe | 178564 || || — || November 9, 1999 || Kitt Peak || Spacewatch || — || align=right | 1.2 km || |-id=565 bgcolor=#fefefe | 178565 || || — || November 5, 1999 || Socorro || LINEAR || V || align=right data-sort-value="0.98" | 980 m || |-id=566 bgcolor=#fefefe | 178566 || || — || November 9, 1999 || Socorro || LINEAR || — || align=right | 1.6 km || |-id=567 bgcolor=#fefefe |