MAR || align=right | 5.8 km || |-id=602 bgcolor=#d6d6d6 | 31602 || 1999 GG || — || April 3, 1999 || Višnjan Observatory || K. Korlević || THM || align=right | 8.1 km || |-id=603 bgcolor=#E9E9E9 | 31603 || || — || April 10, 1999 || Fountain Hills || C. W. Juels || — || align=right | 5.5 km || |-id=604 bgcolor=#fefefe | 31604 || || — || April 13, 1999 || Oaxaca || J. M. Roe || V || align=right | 3.5 km || |-id=605 bgcolor=#E9E9E9 | 31605 Braschi || || || April 10, 1999 || Montelupo || M. Tombelli, A. Boattini || — || align=right | 8.8 km || |-id=606 bgcolor=#E9E9E9 | 31606 || || — || April 13, 1999 || Woomera || F. B. Zoltowski || — || align=right | 2.4 km || |-id=607 bgcolor=#E9E9E9 | 31607 || || — || April 15, 1999 || Gekko || T. Kagawa || HEN || align=right | 4.2 km || |-id=608 bgcolor=#d6d6d6 | 31608 || || — || April 12, 1999 || Reedy Creek || J. Broughton || EOS || align=right | 5.8 km || |-id=609 bgcolor=#d6d6d6 | 31609 || || — || April 15, 1999 || Fountain Hills || C. W. Juels || THM || align=right | 10 km || |-id=610 bgcolor=#E9E9E9 | 31610 || || — || April 14, 1999 || Nachi-Katsuura || Y. Shimizu, T. Urata || MAR || align=right | 7.3 km || |-id=611 bgcolor=#fefefe | 31611 || || — || April 13, 1999 || Višnjan Observatory || K. Korlević || V || align=right | 2.9 km || |-id=612 bgcolor=#E9E9E9 | 31612 || || — || April 13, 1999 || Višnjan Observatory || K. Korlević || GEF || align=right | 3.7 km || |-id=613 bgcolor=#E9E9E9 | 31613 || || — || April 10, 1999 || Anderson Mesa || LONEOS || — || align=right | 3.1 km || |-id=614 bgcolor=#d6d6d6 | 31614 || || — || April 11, 1999 || Kitt Peak || Spacewatch || THM || align=right | 9.6 km || |-id=615 bgcolor=#d6d6d6 | 31615 || || — || April 9, 1999 || Socorro || LINEAR || — || align=right | 7.5 km || |-id=616 bgcolor=#d6d6d6 | 31616 || || — || April 15, 1999 || Socorro || LINEAR || EOS || align=right | 8.9 km || |-id=617 bgcolor=#fefefe | 31617 Meeraradha || || || April 15, 1999 || Socorro || LINEAR || — || align=right