km || |-id=551 bgcolor=#fefefe | 31551 || || — || February 18, 1999 || Anderson Mesa || LONEOS || — || align=right | 2.9 km || |-id=552 bgcolor=#E9E9E9 | 31552 || 1999 EJ || — || March 7, 1999 || Reedy Creek || J. Broughton || — || align=right | 4.7 km || |-id=553 bgcolor=#E9E9E9 | 31553 || || — || March 9, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.1 km || |-id=554 bgcolor=#E9E9E9 | 31554 || || — || March 9, 1999 || Kitt Peak || Spacewatch || MAR || align=right | 7.5 km || |-id=555 bgcolor=#fefefe | 31555 Wheeler || || || March 7, 1999 || Gnosca || S. Sposetti || V || align=right | 2.1 km || |-id=556 bgcolor=#E9E9E9 | 31556 Shatner || || || March 13, 1999 || Goodricke-Pigott || R. A. Tucker || VIB || align=right | 5.8 km || |-id=557 bgcolor=#E9E9E9 | 31557 Holleybakich || || || March 13, 1999 || Goodricke-Pigott || R. A. Tucker || GEF || align=right | 3.3 km || |-id=558 bgcolor=#fefefe | 31558 || || — || March 12, 1999 || Kitt Peak || Spacewatch || — || align=right | 2.1 km || |-id=559 bgcolor=#fefefe | 31559 Alonmillet || || || March 15, 1999 || Socorro || LINEAR || FLO || align=right | 1.9 km || |-id=560 bgcolor=#fefefe | 31560 || || — || March 11, 1999 || Kitt Peak || Spacewatch || — || align=right | 5.5 km || |-id=561 bgcolor=#fefefe | 31561 || || — || March 21, 1999 || Farra d'Isonzo || Farra d'Isonzo || — || align=right | 3.1 km || |-id=562 bgcolor=#fefefe | 31562 || || — || March 19, 1999 || Caussols || ODAS || — || align=right | 2.1 km || |-id=563 bgcolor=#fefefe | 31563 || || — || March 19, 1999 || Anderson Mesa || LONEOS || NYS || align=right | 7.1 km || |-id=564 bgcolor=#fefefe | 31564 || || — || March 20, 1999 || Anderson Mesa || LONEOS || FLO || align=right | 3.9 km || |-id=565 bgcolor=#fefefe | 31565 || || — || March 22, 1999 || Anderson Mesa || LONEOS || — || align=right | 3.5 km || |-id=566 bgcolor=#E9E9E9 | 31566 || || — || March 22, 1999 || Anderson Mesa || LONEOS || — || align=right | 4.6 km || |-id=567 bgcolor=#E9E9E9 | 31567 || || — || March 22,