March 15, 2008 || Kitt Peak || Spacewatch || — || align=right | 2.8 km || |-id=518 bgcolor=#E9E9E9 | 401518 || || — || March 12, 2005 || Kitt Peak || Spacewatch || — || align=right | 1.2 km || |-id=519 bgcolor=#E9E9E9 | 401519 || || — || September 26, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.6 km || |-id=520 bgcolor=#E9E9E9 | 401520 || || — || April 2, 2005 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.87" | 870 m || |-id=521 bgcolor=#d6d6d6 | 401521 || || — || February 12, 2008 || Kitt Peak || Spacewatch || — || align=right | 2.3 km || |-id=522 bgcolor=#fefefe | 401522 || || — || October 1, 2003 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.93" | 930 m || |-id=523 bgcolor=#E9E9E9 | 401523 || || — || December 19, 2007 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.5 km || |-id=524 bgcolor=#E9E9E9 | 401524 || || — || February 22, 2004 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=525 bgcolor=#E9E9E9 | 401525 || || — || March 16, 2004 || Catalina || CSS || — || align=right | 2.6 km || |-id=526 bgcolor=#E9E9E9 | 401526 || || — || May 13, 2005 || Kitt Peak || Spacewatch || — || align=right | 2.0 km || |-id=527 bgcolor=#d6d6d6 | 401527 || || — || January 17, 2007 || Kitt Peak || Spacewatch || — || align=right | 3.4 km || |-id=528 bgcolor=#E9E9E9 | 401528 || || — || December 22, 2003 || Socorro || LINEAR || — || align=right | 1.3 km || |-id=529 bgcolor=#E9E9E9 | 401529 || || — || March 29, 2000 || Kitt Peak || Spacewatch || — || align=right | 1.4 km || |-id=530 bgcolor=#E9E9E9 | 401530 || || — || March 14, 2004 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=531 bgcolor=#E9E9E9 | 401531 || || — || November 18, 2007 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.5 km || |-id=532 bgcolor=#E9E9E9 | 401532 || || — || August 21, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.0 km || |-id=533 bgcolor=#d6d6d6 | 401533 || || — || February 8, 2007 || Mount Lemmon || Mount Lemmon Survey || — ||