Kitt Peak || Spacewatch || — || align=right | 2.3 km || |-id=845 bgcolor=#fefefe | 39845 || || — || January 28, 1998 || Kitt Peak || Spacewatch || FLO || align=right | 5.0 km || |-id=846 bgcolor=#fefefe | 39846 || || — || January 26, 1998 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=847 bgcolor=#E9E9E9 | 39847 || || — || January 20, 1998 || Socorro || LINEAR || — || align=right | 3.4 km || |-id=848 bgcolor=#fefefe | 39848 || || — || January 22, 1998 || Kitt Peak || Spacewatch || — || align=right | 2.3 km || |-id=849 bgcolor=#fefefe | 39849 Giampieri || || || February 13, 1998 || San Marcello || L. Tesi, A. Boattini || — || align=right | 2.1 km || |-id=850 bgcolor=#fefefe | 39850 || || — || February 6, 1998 || La Silla || E. W. Elst || — || align=right | 3.3 km || |-id=851 bgcolor=#fefefe | 39851 || || — || February 6, 1998 || La Silla || E. W. Elst || MAS || align=right | 2.2 km || |-id=852 bgcolor=#fefefe | 39852 || || — || February 6, 1998 || La Silla || E. W. Elst || V || align=right | 1.9 km || |-id=853 bgcolor=#fefefe | 39853 || || — || February 6, 1998 || La Silla || E. W. Elst || NYS || align=right | 1.8 km || |-id=854 bgcolor=#fefefe | 39854 Gabriopiola || || || February 20, 1998 || Bologna || San Vittore Obs. || — || align=right | 2.3 km || |-id=855 bgcolor=#fefefe | 39855 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 5.5 km || |-id=856 bgcolor=#fefefe | 39856 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 2.2 km || |-id=857 bgcolor=#fefefe | 39857 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 2.3 km || |-id=858 bgcolor=#E9E9E9 | 39858 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 3.4 km || |-id=859 bgcolor=#fefefe | 39859 || || — || February 17, 1998 || Kitt Peak || Spacewatch || ERI || align=right | 4.1 km || |-id=860 bgcolor=#fefefe | 39860 Aiguoxiang || || || February 17, 1998 || Xinglong || SCAP || FLO || align=right | 1.4