| 401501 || || — || March 21, 2004 || Kitt Peak || Spacewatch || — || align=right | 2.2 km || |-id=502 bgcolor=#fefefe | 401502 || || — || September 13, 2007 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.1 km || |-id=503 bgcolor=#E9E9E9 | 401503 || || — || April 28, 2009 || Catalina || CSS || — || align=right | 1.9 km || |-id=504 bgcolor=#E9E9E9 | 401504 || || — || September 18, 2006 || Kitt Peak || Spacewatch || || align=right | 2.7 km || |-id=505 bgcolor=#E9E9E9 | 401505 || || — || February 9, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.5 km || |-id=506 bgcolor=#d6d6d6 | 401506 || || — || December 27, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.4 km || |-id=507 bgcolor=#d6d6d6 | 401507 || || — || March 10, 2003 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=508 bgcolor=#d6d6d6 | 401508 || || — || October 1, 2010 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 3.4 km || |-id=509 bgcolor=#d6d6d6 | 401509 || || — || January 15, 2007 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=510 bgcolor=#fefefe | 401510 || || — || September 12, 2007 || Kitt Peak || Spacewatch || V || align=right data-sort-value="0.75" | 750 m || |-id=511 bgcolor=#fefefe | 401511 || || — || February 25, 2006 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.75" | 750 m || |-id=512 bgcolor=#fefefe | 401512 || || — || August 24, 2007 || Kitt Peak || Spacewatch || — || align=right | 1.1 km || |-id=513 bgcolor=#E9E9E9 | 401513 || || — || June 18, 2005 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.3 km || |-id=514 bgcolor=#E9E9E9 | 401514 || || — || August 28, 2006 || Catalina || CSS || — || align=right | 1.2 km || |-id=515 bgcolor=#fefefe | 401515 || || — || October 11, 2004 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.82" | 820 m || |-id=516 bgcolor=#E9E9E9 | 401516 || || — || August 18, 2006 || Kitt Peak || Spacewatch || AGN || align=right | 1.1 km || |-id=517 bgcolor=#d6d6d6 | 401517 || || — ||