|| || — || October 7, 2004 || Socorro || LINEAR || — || align=right data-sort-value="0.87" | 870 m || |-id=227 bgcolor=#d6d6d6 | 401227 || || — || October 11, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.2 km || |-id=228 bgcolor=#E9E9E9 | 401228 || || — || February 10, 1999 || Kitt Peak || Spacewatch || — || align=right | 1.8 km || |-id=229 bgcolor=#E9E9E9 | 401229 || || — || August 27, 2006 || Anderson Mesa || LONEOS || — || align=right | 1.2 km || |-id=230 bgcolor=#d6d6d6 | 401230 || || — || October 11, 2010 || Catalina || CSS || EOS || align=right | 2.1 km || |-id=231 bgcolor=#E9E9E9 | 401231 || || — || December 15, 2007 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=232 bgcolor=#d6d6d6 | 401232 || || — || February 22, 2007 || Catalina || CSS || — || align=right | 3.9 km || |-id=233 bgcolor=#d6d6d6 | 401233 || || — || October 30, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.7 km || |-id=234 bgcolor=#E9E9E9 | 401234 || || — || July 5, 2005 || Kitt Peak || Spacewatch || — || align=right | 2.1 km || |-id=235 bgcolor=#d6d6d6 | 401235 || || — || September 15, 2009 || Mount Lemmon || Mount Lemmon Survey || VER || align=right | 3.3 km || |-id=236 bgcolor=#d6d6d6 | 401236 || || — || September 18, 2003 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=237 bgcolor=#E9E9E9 | 401237 || || — || January 16, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.0 km || |-id=238 bgcolor=#d6d6d6 | 401238 || || — || March 16, 2007 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=239 bgcolor=#d6d6d6 | 401239 || || — || June 16, 2010 || WISE || WISE || — || align=right | 3.4 km || |-id=240 bgcolor=#E9E9E9 | 401240 || || — || February 2, 2008 || Kitt Peak || Spacewatch || MAR || align=right | 1.2 km || |-id=241 bgcolor=#d6d6d6 | 401241 || || — || November 13, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.4 km || |-id=242 bgcolor=#d6d6d6 | 401242 || || — || September 18, 2010 || Mount Lemmon ||