km || |-id=257 bgcolor=#fefefe | 20257 || || — || March 18, 1998 || Kitt Peak || Spacewatch || — || align=right | 3.0 km || |-id=258 bgcolor=#fefefe | 20258 || || — || March 24, 1998 || Caussols || ODAS || — || align=right | 2.9 km || |-id=259 bgcolor=#fefefe | 20259 Alanhoffman || || || March 24, 1998 || Caussols || ODAS || — || align=right | 2.7 km || |-id=260 bgcolor=#E9E9E9 | 20260 || || — || March 22, 1998 || Oizumi || T. Kobayashi || — || align=right | 4.9 km || |-id=261 bgcolor=#E9E9E9 | 20261 || || — || March 19, 1998 || Xinglong || SCAP || — || align=right | 6.2 km || |-id=262 bgcolor=#E9E9E9 | 20262 || || — || March 25, 1998 || Haleakala || NEAT || — || align=right | 10 km || |-id=263 bgcolor=#fefefe | 20263 || || — || March 25, 1998 || Gekko || T. Kagawa || NYS || align=right | 3.6 km || |-id=264 bgcolor=#fefefe | 20264 Chauhan || || || March 20, 1998 || Socorro || LINEAR || MAS || align=right | 3.8 km || |-id=265 bgcolor=#fefefe | 20265 Yuyinchen || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 2.4 km || |-id=266 bgcolor=#fefefe | 20266 Danielchoi || || || March 20, 1998 || Socorro || LINEAR || FLO || align=right | 2.6 km || |-id=267 bgcolor=#E9E9E9 | 20267 || || — || March 20, 1998 || Socorro || LINEAR || — || align=right | 4.7 km || |-id=268 bgcolor=#fefefe | 20268 Racollier || || || March 20, 1998 || Socorro || LINEAR || V || align=right | 2.5 km || |-id=269 bgcolor=#fefefe | 20269 || || — || March 20, 1998 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=270 bgcolor=#fefefe | 20270 Phildeutsch || || || March 20, 1998 || Socorro || LINEAR || NYS || align=right | 3.1 km || |-id=271 bgcolor=#fefefe | 20271 Allygoldberg || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 5.9 km || |-id=272 bgcolor=#fefefe | 20272 Duyha || || || March 20, 1998 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=273 bgcolor=#fefefe | 20273 || || — || March 20, 1998 || Socorro || LINEAR || — || align=right | 2.7 km || |-id=274 bgcolor=#fefefe | 20274