| 178448 || || — || March 19, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.8 km || |-id=449 bgcolor=#E9E9E9 | 178449 || || — || March 20, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.0 km || |-id=450 bgcolor=#E9E9E9 | 178450 || || — || April 6, 1999 || Kitt Peak || Spacewatch || AGN || align=right | 1.5 km || |-id=451 bgcolor=#fefefe | 178451 || || — || April 14, 1999 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.98" | 980 m || |-id=452 bgcolor=#E9E9E9 | 178452 || || — || April 18, 1999 || Kitt Peak || Spacewatch || NEM || align=right | 3.9 km || |-id=453 bgcolor=#E9E9E9 | 178453 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 3.6 km || |-id=454 bgcolor=#E9E9E9 | 178454 || || — || May 12, 1999 || Socorro || LINEAR || — || align=right | 4.2 km || |-id=455 bgcolor=#fefefe | 178455 || || — || July 13, 1999 || Socorro || LINEAR || FLO || align=right data-sort-value="0.99" | 990 m || |-id=456 bgcolor=#fefefe | 178456 || || — || July 14, 1999 || Socorro || LINEAR || FLO || align=right data-sort-value="0.92" | 920 m || |-id=457 bgcolor=#fefefe | 178457 || || — || September 8, 1999 || Socorro || LINEAR || PHO || align=right | 2.0 km || |-id=458 bgcolor=#d6d6d6 | 178458 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=459 bgcolor=#d6d6d6 | 178459 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 3.7 km || |-id=460 bgcolor=#d6d6d6 | 178460 || || — || September 7, 1999 || Socorro || LINEAR || URS || align=right | 6.7 km || |-id=461 bgcolor=#fefefe | 178461 || || — || September 7, 1999 || Socorro || LINEAR || FLO || align=right data-sort-value="0.96" | 960 m || |-id=462 bgcolor=#fefefe | 178462 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 1.2 km || |-id=463 bgcolor=#fefefe | 178463 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=464 bgcolor=#fefefe | 178464 || || — || September 7, 1999 || Socorro || LINEAR || FLO || align=right | 1.0 km || |-id=465 bgcolor=#d6d6d6