|| Caussols || ODAS || — || align=right | 3.5 km || |-id=636 bgcolor=#d6d6d6 | 18636 Villedepompey || || || March 2, 1998 || Caussols || ODAS || KOR || align=right | 5.1 km || |-id=637 bgcolor=#E9E9E9 | 18637 Liverdun || || || March 2, 1998 || Caussols || ODAS || EUN || align=right | 2.9 km || |-id=638 bgcolor=#E9E9E9 | 18638 Nouet || || || March 2, 1998 || Caussols || ODAS || — || align=right | 8.7 km || |-id=639 bgcolor=#E9E9E9 | 18639 Aoyunzhiyuanzhe || || || March 5, 1998 || Xinglong || SCAP || — || align=right | 4.2 km || |-id=640 bgcolor=#fefefe | 18640 || || — || March 7, 1998 || Xinglong || SCAP || PHO || align=right | 6.7 km || |-id=641 bgcolor=#fefefe | 18641 || || — || March 6, 1998 || Gekko || T. Kagawa || — || align=right | 3.7 km || |-id=642 bgcolor=#fefefe | 18642 || || — || March 1, 1998 || La Silla || E. W. Elst || — || align=right | 2.5 km || |-id=643 bgcolor=#E9E9E9 | 18643 van Rysselberghe || || || March 1, 1998 || La Silla || E. W. Elst || — || align=right | 5.8 km || |-id=644 bgcolor=#fefefe | 18644 Arashiyama || || || March 2, 1998 || Geisei || T. Seki || — || align=right | 3.8 km || |-id=645 bgcolor=#d6d6d6 | 18645 || || — || March 3, 1998 || La Silla || E. W. Elst || THM || align=right | 10 km || |-id=646 bgcolor=#fefefe | 18646 || || — || March 3, 1998 || La Silla || E. W. Elst || — || align=right | 4.4 km || |-id=647 bgcolor=#E9E9E9 | 18647 Václavhübner || || || March 21, 1998 || Ondřejov || P. Pravec || — || align=right | 2.7 km || |-id=648 bgcolor=#fefefe | 18648 || || — || March 24, 1998 || Caussols || ODAS || — || align=right | 1.8 km || |-id=649 bgcolor=#E9E9E9 | 18649 Fabrega || || || March 24, 1998 || Caussols || ODAS || GEF || align=right | 4.0 km || |-id=650 bgcolor=#E9E9E9 | 18650 || || — || March 24, 1998 || Caussols || ODAS || WIT || align=right | 4.0 km || |-id=651 bgcolor=#fefefe | 18651 || || — || March 22, 1998 || Nachi-Katsuura || Y. Shimizu, T. Urata || — || align=right | 4.0 km || |-id=652