November 16, 1998 || Kitt Peak || Spacewatch || — || align=right | 2.5 km || |-id=389 bgcolor=#E9E9E9 | 401389 || || — || February 25, 2009 || Siding Spring || SSS || — || align=right | 1.7 km || |-id=390 bgcolor=#d6d6d6 | 401390 || || — || September 29, 2005 || Kitt Peak || Spacewatch || — || align=right | 3.1 km || |-id=391 bgcolor=#E9E9E9 | 401391 || || — || March 29, 2009 || Siding Spring || SSS || — || align=right | 3.0 km || |-id=392 bgcolor=#E9E9E9 | 401392 || || — || September 11, 2006 || Catalina || CSS || (194) || align=right | 3.1 km || |-id=393 bgcolor=#fefefe | 401393 || || — || March 3, 2006 || Catalina || CSS || — || align=right data-sort-value="0.95" | 950 m || |-id=394 bgcolor=#fefefe | 401394 || || — || October 21, 2001 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.73" | 730 m || |-id=395 bgcolor=#d6d6d6 | 401395 || || — || September 1, 2005 || Kitt Peak || Spacewatch || — || align=right | 2.5 km || |-id=396 bgcolor=#fefefe | 401396 || || — || December 22, 2008 || Mount Lemmon || Mount Lemmon Survey || V || align=right data-sort-value="0.79" | 790 m || |-id=397 bgcolor=#E9E9E9 | 401397 || || — || November 21, 2003 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.97" | 970 m || |-id=398 bgcolor=#fefefe | 401398 || || — || October 25, 2008 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.73" | 730 m || |-id=399 bgcolor=#E9E9E9 | 401399 || || — || December 31, 2008 || Kitt Peak || Spacewatch || — || align=right | 1.6 km || |-id=400 bgcolor=#fefefe | 401400 || || — || November 19, 2008 || Mount Lemmon || Mount Lemmon Survey || — || align=right data-sort-value="0.95" | 950 m || |} 401401–401500 |-bgcolor=#d6d6d6 | 401401 || || — || October 1, 2005 || Catalina || CSS || — || align=right | 3.3 km || |-id=402 bgcolor=#d6d6d6 | 401402 || || — || April 12, 2008 || Catalina || CSS || — || align=right | 3.6 km || |-id=403 bgcolor=#d6d6d6 | 401403 || || — || December 9, 1996 || Kitt Peak || Spacewatch || TEL || align=right | 1.6 km || |-id=404 bgcolor=#fefefe | 401404 || || — || April 9, 2006 || Mount Lemmon || Mount Lemmon