Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.2 km || |-id=278 bgcolor=#E9E9E9 | 383278 || || — || September 21, 2003 || Kitt Peak || Spacewatch || — || align=right | 2.2 km || |-id=279 bgcolor=#E9E9E9 | 383279 || || — || February 25, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.9 km || |-id=280 bgcolor=#E9E9E9 | 383280 || || — || February 25, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.2 km || |-id=281 bgcolor=#E9E9E9 | 383281 || || — || February 27, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.1 km || |-id=282 bgcolor=#E9E9E9 | 383282 || || — || December 9, 2004 || Kitt Peak || Spacewatch || AGN || align=right | 1.4 km || |-id=283 bgcolor=#E9E9E9 | 383283 || || — || February 27, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 2.0 km || |-id=284 bgcolor=#E9E9E9 | 383284 || || — || February 27, 2006 || Kitt Peak || Spacewatch || — || align=right | 2.2 km || |-id=285 bgcolor=#E9E9E9 | 383285 || || — || February 21, 2006 || Catalina || CSS || — || align=right | 1.2 km || |-id=286 bgcolor=#E9E9E9 | 383286 || || — || February 25, 2006 || Catalina || CSS || EUN || align=right | 1.6 km || |-id=287 bgcolor=#E9E9E9 | 383287 || || — || February 28, 2006 || Catalina || CSS || — || align=right | 3.3 km || |-id=288 bgcolor=#E9E9E9 | 383288 || || — || February 27, 2006 || Catalina || CSS || EUN || align=right | 1.3 km || |-id=289 bgcolor=#E9E9E9 | 383289 || || — || February 25, 2006 || Mount Lemmon || Mount Lemmon Survey || — || align=right | 1.7 km || |-id=290 bgcolor=#E9E9E9 | 383290 || || — || February 24, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.3 km || |-id=291 bgcolor=#E9E9E9 | 383291 || || — || March 2, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.9 km || |-id=292 bgcolor=#E9E9E9 | 383292 || || — || March 3, 2006 || Kitt Peak || Spacewatch || — || align=right data-sort-value="0.72" | 720 m || |-id=293 bgcolor=#E9E9E9 | 383293 || || — || March 3, 2006 || Kitt Peak || Spacewatch || — || align=right | 1.8 km