align=right | 3.3 km || |-id=979 bgcolor=#fefefe | 39979 || || — || April 22, 1998 || Haleakala || NEAT || PHO || align=right | 5.4 km || |-id=980 bgcolor=#E9E9E9 | 39980 || || — || April 18, 1998 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=981 bgcolor=#fefefe | 39981 || || — || April 17, 1998 || Kitt Peak || Spacewatch || NYS || align=right | 4.0 km || |-id=982 bgcolor=#E9E9E9 | 39982 || || — || April 22, 1998 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=983 bgcolor=#fefefe | 39983 || || — || April 18, 1998 || Socorro || LINEAR || V || align=right | 1.9 km || |-id=984 bgcolor=#fefefe | 39984 || || — || April 18, 1998 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=985 bgcolor=#E9E9E9 | 39985 || || — || April 28, 1998 || Kitt Peak || Spacewatch || EUN || align=right | 2.4 km || |-id=986 bgcolor=#E9E9E9 | 39986 || || — || April 20, 1998 || Socorro || LINEAR || EUN || align=right | 3.6 km || |-id=987 bgcolor=#fefefe | 39987 || || — || April 20, 1998 || Socorro || LINEAR || NYS || align=right | 1.8 km || |-id=988 bgcolor=#fefefe | 39988 || || — || April 20, 1998 || Socorro || LINEAR || — || align=right | 4.6 km || |-id=989 bgcolor=#E9E9E9 | 39989 || || — || April 20, 1998 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=990 bgcolor=#fefefe | 39990 || || — || April 20, 1998 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=991 bgcolor=#fefefe | 39991 Iochroma || || || April 20, 1998 || Socorro || LINEAR || — || align=right | 3.8 km || |-id=992 bgcolor=#E9E9E9 | 39992 || || — || April 20, 1998 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=993 bgcolor=#E9E9E9 | 39993 || || — || April 24, 1998 || Kitt Peak || Spacewatch || — || align=right | 2.3 km || |-id=994 bgcolor=#E9E9E9 | 39994 || || — || April 20, 1998 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=995 bgcolor=#E9E9E9 | 39995 || || — || April 25, 1998 || Anderson Mesa || LONEOS || — || align=right | 8.3 km