km || |-id=306 bgcolor=#d6d6d6 | 53306 || || — || April 24, 1999 || Reedy Creek || J. Broughton || EOS || align=right | 6.3 km || |-id=307 bgcolor=#E9E9E9 | 53307 || || — || April 20, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.5 km || |-id=308 bgcolor=#E9E9E9 | 53308 || || — || April 16, 1999 || Socorro || LINEAR || — || align=right | 4.6 km || |-id=309 bgcolor=#d6d6d6 | 53309 || || — || April 17, 1999 || Socorro || LINEAR || — || align=right | 3.8 km || |-id=310 bgcolor=#d6d6d6 | 53310 || || — || April 17, 1999 || Socorro || LINEAR || — || align=right | 8.9 km || |-id=311 bgcolor=#C2E0FF | 53311 Deucalion || || || April 18, 1999 || Kitt Peak || DES || cubewano (cold)critical || align=right | 203 km || |-id=312 bgcolor=#E9E9E9 | 53312 || 1999 JZ || — || May 7, 1999 || Socorro || LINEAR || — || align=right | 9.9 km || |-id=313 bgcolor=#d6d6d6 | 53313 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 5.1 km || |-id=314 bgcolor=#E9E9E9 | 53314 || || — || May 7, 1999 || Xinglong || SCAP || INO || align=right | 3.4 km || |-id=315 bgcolor=#E9E9E9 | 53315 || || — || May 10, 1999 || High Point || D. K. Chesney || ADE || align=right | 8.6 km || |-id=316 bgcolor=#d6d6d6 | 53316 Michielford || || || May 9, 1999 || Farpoint || G. Hug || — || align=right | 3.4 km || |-id=317 bgcolor=#E9E9E9 | 53317 || || — || May 13, 1999 || Socorro || LINEAR || — || align=right | 9.0 km || |-id=318 bgcolor=#E9E9E9 | 53318 || || — || May 13, 1999 || Reedy Creek || J. Broughton || EUN || align=right | 4.6 km || |-id=319 bgcolor=#FFC2E0 | 53319 || || — || May 13, 1999 || Socorro || LINEAR || APO +1kmPHAslow || align=right | 7.0 km || |-id=320 bgcolor=#d6d6d6 | 53320 || || — || May 14, 1999 || Prescott || P. G. Comba || EOS || align=right | 4.7 km || |-id=321 bgcolor=#E9E9E9 | 53321 || || — || May 8, 1999 || Catalina || CSS || — || align=right | 3.9 km || |-id=322 bgcolor=#E9E9E9 | 53322 || || — || May 15, 1999 || Catalina ||