Mount Lemmon Survey || — || align=right | 1.1 km || |-id=288 bgcolor=#E9E9E9 | 463288 || || — || January 27, 2007 || Mount Lemmon || Mount Lemmon Survey || JUN || align=right data-sort-value="0.87" | 870 m || |-id=289 bgcolor=#E9E9E9 | 463289 || || — || March 14, 2007 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.9 km || |-id=290 bgcolor=#E9E9E9 | 463290 || || — || October 8, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.2 km || |-id=291 bgcolor=#d6d6d6 | 463291 || || — || April 25, 2012 || Kitt Peak || Spacewatch || EOS || align=right | 2.2 km || |-id=292 bgcolor=#E9E9E9 | 463292 || || — || April 1, 2012 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.2 km || |-id=293 bgcolor=#FA8072 | 463293 || || — || December 7, 2002 || Desert Eagle || W. K. Y. Yeung || — || align=right | 2.3 km || |-id=294 bgcolor=#d6d6d6 | 463294 || || — || April 18, 2012 || Catalina || CSS || NAE || align=right | 3.0 km || |-id=295 bgcolor=#E9E9E9 | 463295 || || — || December 27, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.4 km || |-id=296 bgcolor=#E9E9E9 | 463296 || || — || May 3, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.2 km || |-id=297 bgcolor=#E9E9E9 | 463297 || || — || September 17, 2009 || Kitt Peak || Spacewatch || EUN || align=right | 1.2 km || |-id=298 bgcolor=#E9E9E9 | 463298 || || — || January 4, 2011 || Mount Lemmon || Mount Lemmon Survey || — || align=right data-sort-value="0.96" | 960 m || |-id=299 bgcolor=#E9E9E9 | 463299 || || — || September 3, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.6 km || |-id=300 bgcolor=#E9E9E9 | 463300 || || — || May 29, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.2 km || |} 463301–463400 |-bgcolor=#E9E9E9 | 463301 || || — || March 26, 2003 || Palomar || NEAT || — || align=right | 1.3 km || |-id=302 bgcolor=#E9E9E9 | 463302 || || — || April 29, 2012 || Kitt Peak || Spacewatch || — || align=right | 1.3 km || |-id=303 bgcolor=#E9E9E9 | 463303 || || — || January