Kitt Peak || Spacewatch || — || align=right | 1.5 km || |-id=256 bgcolor=#E9E9E9 | 463256 || || — || March 13, 2008 || Kitt Peak || Spacewatch || — || align=right | 1.6 km || |-id=257 bgcolor=#FFC2E0 | 463257 || || — || April 2, 2012 || Haleakala || Pan-STARRS || AMO || align=right data-sort-value="0.68" | 680 m || |-id=258 bgcolor=#E9E9E9 | 463258 || || — || January 3, 2011 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.9 km || |-id=259 bgcolor=#E9E9E9 | 463259 || || — || April 10, 2012 || Kitt Peak || Spacewatch || — || align=right | 1.7 km || |-id=260 bgcolor=#E9E9E9 | 463260 || || — || March 4, 2012 || Mount Lemmon || Mount Lemmon Survey || EUN || align=right | 1.1 km || |-id=261 bgcolor=#E9E9E9 | 463261 || || — || September 16, 2009 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.6 km || |-id=262 bgcolor=#E9E9E9 | 463262 || || — || July 15, 2004 || Siding Spring || SSS || — || align=right | 1.4 km || |-id=263 bgcolor=#E9E9E9 | 463263 || || — || October 20, 1993 || Kitt Peak || Spacewatch || — || align=right | 1.2 km || |-id=264 bgcolor=#E9E9E9 | 463264 || || — || May 28, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right data-sort-value="0.92" | 920 m || |-id=265 bgcolor=#fefefe | 463265 || || — || January 30, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right data-sort-value="0.67" | 670 m || |-id=266 bgcolor=#E9E9E9 | 463266 || || — || March 27, 2012 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.3 km || |-id=267 bgcolor=#E9E9E9 | 463267 || || — || February 9, 2002 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=268 bgcolor=#E9E9E9 | 463268 || || — || January 11, 2011 || Kitt Peak || Spacewatch || — || align=right | 3.2 km || |-id=269 bgcolor=#fefefe | 463269 || || — || October 21, 1995 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.88" | 880 m || |-id=270 bgcolor=#E9E9E9 | 463270 || || — || October 10, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.3 km || |-id=271 bgcolor=#E9E9E9 | 463271 || || — || April 11, 2008 || Kitt