|| || — || April 21, 1998 || Socorro || LINEAR || FLO || align=right | 1.2 km || |-id=398 bgcolor=#fefefe | 178398 || || — || May 29, 1998 || Kitt Peak || Spacewatch || V || align=right | 1.1 km || |-id=399 bgcolor=#d6d6d6 | 178399 || || — || June 25, 1998 || Kitt Peak || Spacewatch || — || align=right | 4.5 km || |-id=400 bgcolor=#fefefe | 178400 || || — || July 26, 1998 || La Silla || E. W. Elst || — || align=right | 1.6 km || |} 178401–178500 |-bgcolor=#fefefe | 178401 || || — || August 17, 1998 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=402 bgcolor=#fefefe | 178402 || || — || August 17, 1998 || Socorro || LINEAR || — || align=right | 1.5 km || |-id=403 bgcolor=#fefefe | 178403 || || — || August 17, 1998 || Socorro || LINEAR || H || align=right | 1.00 km || |-id=404 bgcolor=#fefefe | 178404 || || — || August 17, 1998 || Reedy Creek || J. Broughton || — || align=right | 1.2 km || |-id=405 bgcolor=#fefefe | 178405 || || — || August 17, 1998 || Socorro || LINEAR || — || align=right | 3.2 km || |-id=406 bgcolor=#E9E9E9 | 178406 || || — || August 24, 1998 || Reedy Creek || J. Broughton || — || align=right | 1.5 km || |-id=407 bgcolor=#fefefe | 178407 || || — || August 26, 1998 || Kitt Peak || Spacewatch || NYS || align=right | 1.4 km || |-id=408 bgcolor=#E9E9E9 | 178408 || 1998 RR || — || September 9, 1998 || Caussols || ODAS || — || align=right | 2.5 km || |-id=409 bgcolor=#fefefe | 178409 || || — || September 14, 1998 || Socorro || LINEAR || H || align=right data-sort-value="0.82" | 820 m || |-id=410 bgcolor=#fefefe | 178410 || || — || September 14, 1998 || Anderson Mesa || LONEOS || — || align=right | 1.7 km || |-id=411 bgcolor=#fefefe | 178411 || || — || September 13, 1998 || Kitt Peak || Spacewatch || — || align=right | 1.4 km || |-id=412 bgcolor=#E9E9E9 | 178412 || || — || September 14, 1998 || Socorro || LINEAR || — || align=right | 1.0 km || |-id=413 bgcolor=#fefefe | 178413 || || — || September 14, 1998 || Socorro || LINEAR || FLO || align=right |