| 33421 Byronxu || || || February 13, 1999 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=422 bgcolor=#d6d6d6 | 33422 || || — || February 8, 1999 || Kitt Peak || Spacewatch || KOR || align=right | 3.5 km || |-id=423 bgcolor=#fefefe | 33423 || 1999 DK || — || February 16, 1999 || Caussols || ODAS || FLO || align=right | 2.6 km || |-id=424 bgcolor=#fefefe | 33424 || || — || February 16, 1999 || Socorro || LINEAR || PHO || align=right | 3.5 km || |-id=425 bgcolor=#fefefe | 33425 || || — || February 19, 1999 || Oizumi || T. Kobayashi || — || align=right | 2.4 km || |-id=426 bgcolor=#fefefe | 33426 || || — || February 19, 1999 || Oizumi || T. Kobayashi || V || align=right | 2.1 km || |-id=427 bgcolor=#fefefe | 33427 || || — || February 21, 1999 || Oizumi || T. Kobayashi || FLO || align=right | 2.3 km || |-id=428 bgcolor=#fefefe | 33428 || || — || February 18, 1999 || Višnjan Observatory || K. Korlević, M. Jurić || — || align=right | 2.2 km || |-id=429 bgcolor=#d6d6d6 | 33429 || || — || February 23, 1999 || Višnjan Observatory || K. Korlević, M. Jurić || — || align=right | 6.7 km || |-id=430 bgcolor=#fefefe | 33430 || 1999 EH || — || March 7, 1999 || Reedy Creek || J. Broughton || — || align=right | 2.4 km || |-id=431 bgcolor=#fefefe | 33431 || 1999 EK || — || March 9, 1999 || Zeno || T. Stafford || NYS || align=right | 3.3 km || |-id=432 bgcolor=#d6d6d6 | 33432 || || — || March 15, 1999 || Prescott || P. G. Comba || — || align=right | 6.0 km || |-id=433 bgcolor=#fefefe | 33433 Maurilia || || || March 14, 1999 || Gnosca || S. Sposetti || — || align=right | 3.3 km || |-id=434 bgcolor=#d6d6d6 | 33434 Scottmanley || 1999 FU || || March 17, 1999 || Caussols || ODAS || KOR || align=right | 4.6 km || |-id=435 bgcolor=#E9E9E9 | 33435 || || — || March 16, 1999 || Kitt Peak || Spacewatch || MIS || align=right | 7.6 km || |-id=436 bgcolor=#E9E9E9 | 33436 || || — || March 20, 1999 || Caussols || ODAS || — || align=right | 8.4 km || |-id=437 bgcolor=#fefefe | 33437 || || —