|| || — || April 21, 1999 || Xinglong || SCAP || NYS || align=right | 3.2 km || |-id=653 bgcolor=#d6d6d6 | 31653 || || — || April 16, 1999 || Kitt Peak || Spacewatch || THM || align=right | 5.7 km || |-id=654 bgcolor=#fefefe | 31654 || || — || April 17, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.4 km || |-id=655 bgcolor=#E9E9E9 | 31655 Averyclowes || || || April 17, 1999 || Socorro || LINEAR || — || align=right | 7.4 km || |-id=656 bgcolor=#d6d6d6 | 31656 || || — || April 16, 1999 || Socorro || LINEAR || EOS || align=right | 11 km || |-id=657 bgcolor=#fefefe | 31657 || || — || April 16, 1999 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=658 bgcolor=#d6d6d6 | 31658 || || — || April 17, 1999 || Socorro || LINEAR || EOS || align=right | 5.9 km || |-id=659 bgcolor=#d6d6d6 | 31659 || || — || April 17, 1999 || Socorro || LINEAR || HYG || align=right | 9.7 km || |-id=660 bgcolor=#fefefe | 31660 Maximiliandu || || || April 17, 1999 || Socorro || LINEAR || — || align=right | 2.5 km || |-id=661 bgcolor=#fefefe | 31661 Eggebraaten || || || April 17, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=662 bgcolor=#FFC2E0 | 31662 || || — || April 19, 1999 || Kitt Peak || Spacewatch || APO || align=right data-sort-value="0.47" | 470 m || |-id=663 bgcolor=#fefefe | 31663 || || — || May 8, 1999 || Catalina || CSS || V || align=right | 2.2 km || |-id=664 bgcolor=#E9E9E9 | 31664 Randiiwessen || || || May 8, 1999 || Farpoint || G. Hug || MAR || align=right | 5.5 km || |-id=665 bgcolor=#d6d6d6 | 31665 Veblen || || || May 10, 1999 || Prescott || P. G. Comba || THM || align=right | 6.3 km || |-id=666 bgcolor=#E9E9E9 | 31666 || || — || May 8, 1999 || Oizumi || T. Kobayashi || EUN || align=right | 5.9 km || |-id=667 bgcolor=#fefefe | 31667 || || — || May 8, 1999 || Oizumi || T. Kobayashi || PHO || align=right | 3.3 km || |-id=668 bgcolor=#d6d6d6 | 31668 || || — || May 6, 1999 || Woomera || F. B. Zoltowski || EOS || align=right | 8.8 km || |-id=669 bgcolor=#FFC2E0