km || |-id=259 bgcolor=#d6d6d6 | 401259 || || — || April 1, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.8 km || |-id=260 bgcolor=#d6d6d6 | 401260 || || — || December 27, 2005 || Kitt Peak || Spacewatch || — || align=right | 3.2 km || |-id=261 bgcolor=#d6d6d6 | 401261 || || — || November 2, 2010 || Kitt Peak || Spacewatch || VER || align=right | 3.8 km || |-id=262 bgcolor=#d6d6d6 | 401262 || || — || February 19, 2001 || Socorro || LINEAR || — || align=right | 3.9 km || |-id=263 bgcolor=#d6d6d6 | 401263 || || — || August 8, 2004 || Socorro || LINEAR || TEL || align=right | 1.8 km || |-id=264 bgcolor=#d6d6d6 | 401264 || || — || April 27, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.4 km || |-id=265 bgcolor=#d6d6d6 | 401265 || || — || April 1, 2008 || Kitt Peak || Spacewatch || EOS || align=right | 2.6 km || |-id=266 bgcolor=#d6d6d6 | 401266 || || — || February 17, 2001 || Socorro || LINEAR || — || align=right | 3.7 km || |-id=267 bgcolor=#d6d6d6 | 401267 || || — || May 3, 2008 || Kitt Peak || Spacewatch || — || align=right | 5.2 km || |-id=268 bgcolor=#d6d6d6 | 401268 || || — || May 26, 2008 || Mount Lemmon || Mount Lemmon Survey || EOS || align=right | 1.8 km || |-id=269 bgcolor=#d6d6d6 | 401269 || || — || November 29, 2005 || Kitt Peak || Spacewatch || — || align=right | 4.2 km || |-id=270 bgcolor=#d6d6d6 | 401270 || || — || January 4, 2012 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.7 km || |-id=271 bgcolor=#d6d6d6 | 401271 || || — || August 31, 2003 || Kitt Peak || Spacewatch || — || align=right | 3.7 km || |-id=272 bgcolor=#d6d6d6 | 401272 || || — || February 21, 2007 || Mount Lemmon || Mount Lemmon Survey || EOS || align=right | 2.0 km || |-id=273 bgcolor=#d6d6d6 | 401273 || || — || August 18, 2009 || Kitt Peak || Spacewatch || — || align=right | 3.1 km || |-id=274 bgcolor=#d6d6d6 | 401274 || || — || December 28, 2005 || Kitt Peak || Spacewatch || — || align=right | 4.0 km || |-id=275 bgcolor=#d6d6d6 | 401275 || || —