|| LINEAR || NYS || align=right | 2.7 km || |-id=603 bgcolor=#fefefe | 18603 || || — || January 28, 1998 || Oizumi || T. Kobayashi || FLO || align=right | 2.5 km || |-id=604 bgcolor=#fefefe | 18604 || || — || January 28, 1998 || Caussols || ODAS || — || align=right | 2.3 km || |-id=605 bgcolor=#E9E9E9 | 18605 Jacqueslaskar || || || January 28, 1998 || Caussols || ODAS || — || align=right | 3.5 km || |-id=606 bgcolor=#fefefe | 18606 || || — || January 31, 1998 || Oizumi || T. Kobayashi || — || align=right | 3.4 km || |-id=607 bgcolor=#fefefe | 18607 || || — || January 31, 1998 || Oizumi || T. Kobayashi || FLO || align=right | 5.1 km || |-id=608 bgcolor=#fefefe | 18608 || || — || January 25, 1998 || Kitt Peak || Spacewatch || NYS || align=right | 2.7 km || |-id=609 bgcolor=#fefefe | 18609 Shinobuyama || || || January 30, 1998 || Geisei || T. Seki || — || align=right | 4.8 km || |-id=610 bgcolor=#E9E9E9 | 18610 Arthurdent || || || February 7, 1998 || Starkenburg Observatory || Starkenburg Obs. || — || align=right | 3.5 km || |-id=611 bgcolor=#fefefe | 18611 Baudelaire || || || February 6, 1998 || La Silla || E. W. Elst || NYS || align=right | 6.5 km || |-id=612 bgcolor=#fefefe | 18612 || || — || February 6, 1998 || La Silla || E. W. Elst || NYS || align=right | 4.1 km || |-id=613 bgcolor=#E9E9E9 | 18613 || 1998 DR || — || February 19, 1998 || Kleť || Kleť Obs. || — || align=right | 6.4 km || |-id=614 bgcolor=#E9E9E9 | 18614 || || — || February 20, 1998 || Caussols || ODAS || BRU || align=right | 9.5 km || |-id=615 bgcolor=#E9E9E9 | 18615 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 6.8 km || |-id=616 bgcolor=#E9E9E9 | 18616 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 13 km || |-id=617 bgcolor=#fefefe | 18617 Puntel || || || February 24, 1998 || Les Tardieux Obs. || M. Boeuf || — || align=right | 2.9 km || |-id=618 bgcolor=#fefefe | 18618 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 4.5 km || |-id=619 bgcolor=#fefefe |