|| Socorro || LINEAR || URS || align=right | 15 km || |-id=500 bgcolor=#fefefe | 31500 Grutzik || || || February 12, 1999 || Socorro || LINEAR || FLO || align=right | 2.7 km || |} 31501–31600 |-bgcolor=#fefefe | 31501 Williamhang || || || February 12, 1999 || Socorro || LINEAR || — || align=right | 2.1 km || |-id=502 bgcolor=#fefefe | 31502 Hellerstein || || || February 12, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=503 bgcolor=#E9E9E9 | 31503 Jessicahong || || || February 12, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=504 bgcolor=#fefefe | 31504 Jaisonjain || || || February 12, 1999 || Socorro || LINEAR || V || align=right | 2.3 km || |-id=505 bgcolor=#fefefe | 31505 || || — || February 12, 1999 || Socorro || LINEAR || NYS || align=right | 9.0 km || |-id=506 bgcolor=#fefefe | 31506 || || — || February 12, 1999 || Socorro || LINEAR || — || align=right | 5.1 km || |-id=507 bgcolor=#fefefe | 31507 Williamjin || || || February 12, 1999 || Socorro || LINEAR || FLO || align=right | 4.6 km || |-id=508 bgcolor=#fefefe | 31508 Kanevsky || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 4.0 km || |-id=509 bgcolor=#fefefe | 31509 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 2.4 km || |-id=510 bgcolor=#fefefe | 31510 Saumya || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 4.1 km || |-id=511 bgcolor=#E9E9E9 | 31511 Jessicakim || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 2.9 km || |-id=512 bgcolor=#E9E9E9 | 31512 Koyyalagunta || || || February 10, 1999 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=513 bgcolor=#fefefe | 31513 Lafazan || || || February 10, 1999 || Socorro || LINEAR || V || align=right | 2.8 km || |-id=514 bgcolor=#fefefe | 31514 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 4.1 km || |-id=515 bgcolor=#E9E9E9 | 31515 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 5.7 km || |-id=516 bgcolor=#fefefe | 31516 Leibowitz || || || February 10, 1999 || Socorro || LINEAR || — || align=right