|| align=right | 28 km || |-id=332 bgcolor=#E9E9E9 | 18332 || 1987 ON || — || July 19, 1987 || Palomar || E. F. Helin || EUN || align=right | 6.5 km || |-id=333 bgcolor=#E9E9E9 | 18333 || 1987 OV || — || July 19, 1987 || Palomar || E. F. Helin || KON || align=right | 10 km || |-id=334 bgcolor=#E9E9E9 | 18334 Drozdov || || || September 2, 1987 || Nauchnij || L. G. Karachkina || — || align=right | 4.2 km || |-id=335 bgcolor=#E9E9E9 | 18335 San Cassiano || || || September 19, 1987 || Anderson Mesa || E. Bowell || — || align=right | 4.3 km || |-id=336 bgcolor=#fefefe | 18336 || 1988 LG || — || June 15, 1988 || Palomar || E. F. Helin || — || align=right | 12 km || |-id=337 bgcolor=#d6d6d6 | 18337 || || — || September 14, 1988 || Cerro Tololo || S. J. Bus || THM || align=right | 5.3 km || |-id=338 bgcolor=#E9E9E9 | 18338 || || — || March 4, 1989 || Palomar || E. F. Helin || GEF || align=right | 5.0 km || |-id=339 bgcolor=#E9E9E9 | 18339 || || — || April 3, 1989 || La Silla || E. W. Elst || — || align=right | 6.9 km || |-id=340 bgcolor=#d6d6d6 | 18340 || 1989 OM || — || July 29, 1989 || Lake Tekapo || A. C. Gilmore, P. M. Kilmartin || — || align=right | 13 km || |-id=341 bgcolor=#fefefe | 18341 || || — || September 26, 1989 || La Silla || E. W. Elst || V || align=right | 4.4 km || |-id=342 bgcolor=#fefefe | 18342 || || — || September 26, 1989 || La Silla || H. Debehogne || NYS || align=right | 1.8 km || |-id=343 bgcolor=#fefefe | 18343 Asja || 1989 TN || || October 2, 1989 || Smolyan || E. W. Elst || NYS || align=right | 3.4 km || |-id=344 bgcolor=#fefefe | 18344 || || — || October 2, 1989 || Cerro Tololo || S. J. Bus || FLO || align=right | 3.3 km || |-id=345 bgcolor=#d6d6d6 | 18345 || || — || October 22, 1989 || Kleť || Z. Vávrová || — || align=right | 9.2 km || |-id=346 bgcolor=#fefefe | 18346 || 1989 WG || — || November 20, 1989 || Gekko || Y. Oshima || — || align=right | 6.4 km ||