align=right | 3.9 km || |-id=534 bgcolor=#d6d6d6 | 401534 || || — || November 2, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.8 km || |-id=535 bgcolor=#d6d6d6 | 401535 || || — || April 1, 2008 || Kitt Peak || Spacewatch || — || align=right | 4.1 km || |-id=536 bgcolor=#E9E9E9 | 401536 || || — || March 4, 2000 || Socorro || LINEAR || — || align=right | 1.8 km || |-id=537 bgcolor=#E9E9E9 | 401537 || || — || March 18, 2009 || Kitt Peak || Spacewatch || — || align=right | 1.6 km || |-id=538 bgcolor=#d6d6d6 | 401538 || || — || October 21, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.3 km || |-id=539 bgcolor=#E9E9E9 | 401539 || || — || October 11, 2007 || Kitt Peak || Spacewatch || — || align=right | 1.1 km || |-id=540 bgcolor=#d6d6d6 | 401540 || || — || June 19, 1998 || Kitt Peak || Spacewatch || SHU3:2 || align=right | 7.3 km || |-id=541 bgcolor=#E9E9E9 | 401541 || || — || April 6, 2005 || Catalina || CSS || EUN || align=right | 1.4 km || |-id=542 bgcolor=#E9E9E9 | 401542 || || — || May 10, 2005 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.5 km || |-id=543 bgcolor=#E9E9E9 | 401543 || || — || August 10, 2010 || Kitt Peak || Spacewatch || — || align=right | 2.0 km || |-id=544 bgcolor=#E9E9E9 | 401544 || || — || November 19, 2007 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.6 km || |-id=545 bgcolor=#d6d6d6 | 401545 || || — || October 24, 2005 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=546 bgcolor=#E9E9E9 | 401546 || || — || February 14, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.6 km || |-id=547 bgcolor=#E9E9E9 | 401547 || || — || September 16, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.5 km || |-id=548 bgcolor=#fefefe | 401548 || || — || April 20, 2006 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.88" | 880 m || |-id=549 bgcolor=#E9E9E9 | 401549 || || — || March 28, 2009 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.9 km || |-id=550 bgcolor=#E9E9E9