|-id=256 bgcolor=#fefefe | 164256 || || — || October 9, 2004 || Socorro || LINEAR || — || align=right | 1.1 km || |-id=257 bgcolor=#fefefe | 164257 || || — || October 9, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.0 km || |-id=258 bgcolor=#fefefe | 164258 || || — || October 9, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.2 km || |-id=259 bgcolor=#fefefe | 164259 || || — || October 7, 2004 || Palomar || NEAT || FLO || align=right | 1.1 km || |-id=260 bgcolor=#fefefe | 164260 || || — || October 11, 2004 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.94" | 940 m || |-id=261 bgcolor=#fefefe | 164261 || || — || October 9, 2004 || Socorro || LINEAR || FLO || align=right | 1.2 km || |-id=262 bgcolor=#fefefe | 164262 || || — || October 9, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.4 km || |-id=263 bgcolor=#fefefe | 164263 || || — || October 16, 2004 || Socorro || LINEAR || PHO || align=right | 4.6 km || |-id=264 bgcolor=#fefefe | 164264 || || — || October 21, 2004 || Socorro || LINEAR || — || align=right | 1.1 km || |-id=265 bgcolor=#fefefe | 164265 || 2004 VO || — || November 2, 2004 || Desert Eagle || W. K. Y. Yeung || — || align=right | 2.3 km || |-id=266 bgcolor=#fefefe | 164266 || || — || November 3, 2004 || Anderson Mesa || LONEOS || FLO || align=right data-sort-value="0.73" | 730 m || |-id=267 bgcolor=#fefefe | 164267 || || — || November 4, 2004 || Catalina || CSS || V || align=right | 1.1 km || |-id=268 bgcolor=#fefefe | 164268 Hajmási || || || November 11, 2004 || Piszkéstető || K. Sárneczky || — || align=right data-sort-value="0.93" | 930 m || |-id=269 bgcolor=#FA8072 | 164269 || || — || November 19, 2004 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=270 bgcolor=#fefefe | 164270 || || — || December 1, 2004 || Catalina || CSS || — || align=right | 1.2 km || |-id=271 bgcolor=#fefefe | 164271 || || — || December 2, 2004 || Socorro || LINEAR || — || align=right | 1.6 km || |-id=272 bgcolor=#fefefe | 164272 || || — || December 2, 2004 || Palomar || NEAT || —