| 22 km || |-id=238 bgcolor=#d6d6d6 | 40238 || || — || November 10, 1998 || Socorro || LINEAR || 3:2 || align=right | 11 km || |-id=239 bgcolor=#d6d6d6 | 40239 || || — || November 10, 1998 || Socorro || LINEAR || — || align=right | 5.9 km || |-id=240 bgcolor=#d6d6d6 | 40240 || || — || November 10, 1998 || Socorro || LINEAR || — || align=right | 10 km || |-id=241 bgcolor=#fefefe | 40241 || || — || November 15, 1998 || Anderson Mesa || LONEOS || H || align=right | 1.6 km || |-id=242 bgcolor=#d6d6d6 | 40242 || || — || November 14, 1998 || Kitt Peak || Spacewatch || HYG || align=right | 7.8 km || |-id=243 bgcolor=#fefefe | 40243 || || — || November 18, 1998 || Catalina || CSS || PHO || align=right | 3.0 km || |-id=244 bgcolor=#fefefe | 40244 || || — || November 17, 1998 || Catalina || CSS || H || align=right | 3.1 km || |-id=245 bgcolor=#FA8072 | 40245 || || — || November 23, 1998 || Socorro || LINEAR || — || align=right | 1.7 km || |-id=246 bgcolor=#d6d6d6 | 40246 || || — || November 21, 1998 || Socorro || LINEAR || 3:2 || align=right | 20 km || |-id=247 bgcolor=#fefefe | 40247 || || — || December 11, 1998 || Socorro || LINEAR || H || align=right | 1.7 km || |-id=248 bgcolor=#E9E9E9 | 40248 Yukikajiura || || || December 12, 1998 || Goodricke-Pigott || R. A. Tucker || — || align=right | 6.4 km || |-id=249 bgcolor=#fefefe | 40249 || || — || December 13, 1998 || Oizumi || T. Kobayashi || — || align=right | 2.7 km || |-id=250 bgcolor=#fefefe | 40250 || || — || December 14, 1998 || Socorro || LINEAR || H || align=right | 1.7 km || |-id=251 bgcolor=#fefefe | 40251 || || — || December 15, 1998 || Socorro || LINEAR || — || align=right | 2.4 km || |-id=252 bgcolor=#fefefe | 40252 || || — || December 22, 1998 || Catalina || CSS || PHO || align=right | 2.0 km || |-id=253 bgcolor=#fefefe | 40253 || || — || January 17, 1999 || Catalina || CSS || H || align=right | 1.9 km || |-id=254 bgcolor=#d6d6d6 | 40254 || || — || January 21, 1999 || Monte Agliale || S. Donati, M. M. M. Santangelo || —