— || October 13, 1999 || Socorro || LINEAR || — || align=right | 1.2 km || |-id=517 bgcolor=#d6d6d6 | 178517 || || — || October 13, 1999 || Socorro || LINEAR || — || align=right | 2.9 km || |-id=518 bgcolor=#fefefe | 178518 || || — || October 14, 1999 || Socorro || LINEAR || H || align=right | 1.3 km || |-id=519 bgcolor=#d6d6d6 | 178519 || || — || October 15, 1999 || Socorro || LINEAR || HYG || align=right | 5.2 km || |-id=520 bgcolor=#fefefe | 178520 || || — || October 15, 1999 || Socorro || LINEAR || FLO || align=right data-sort-value="0.94" | 940 m || |-id=521 bgcolor=#fefefe | 178521 || || — || October 2, 1999 || Socorro || LINEAR || — || align=right | 1.5 km || |-id=522 bgcolor=#fefefe | 178522 || || — || October 2, 1999 || Kitt Peak || Spacewatch || NYS || align=right data-sort-value="0.90" | 900 m || |-id=523 bgcolor=#fefefe | 178523 || || — || October 4, 1999 || Kitt Peak || Spacewatch || — || align=right | 1.3 km || |-id=524 bgcolor=#fefefe | 178524 || || — || October 3, 1999 || Anderson Mesa || LONEOS || FLO || align=right | 1.3 km || |-id=525 bgcolor=#fefefe | 178525 || || — || October 8, 1999 || Catalina || CSS || NYS || align=right | 1.3 km || |-id=526 bgcolor=#E9E9E9 | 178526 || || — || October 6, 1999 || Socorro || LINEAR || — || align=right | 1.2 km || |-id=527 bgcolor=#fefefe | 178527 || || — || October 10, 1999 || Kitt Peak || Spacewatch || MAS || align=right | 1.1 km || |-id=528 bgcolor=#d6d6d6 | 178528 || || — || October 8, 1999 || Socorro || LINEAR || — || align=right | 6.9 km || |-id=529 bgcolor=#fefefe | 178529 || || — || October 10, 1999 || Socorro || LINEAR || — || align=right | 1.5 km || |-id=530 bgcolor=#fefefe | 178530 || || — || October 10, 1999 || Socorro || LINEAR || FLO || align=right | 1.0 km || |-id=531 bgcolor=#fefefe | 178531 || || — || October 11, 1999 || Socorro || LINEAR || — || align=right data-sort-value="0.98" | 980 m || |-id=532 bgcolor=#fefefe | 178532 || || — || October 6, 1999 || Socorro || LINEAR || NYS || align=right data-sort-value="0.81" | 810 m || |-id=533 bgcolor=#fefefe | 178533 || || —