|| Oizumi || T. Kobayashi || DOR || align=right | 8.4 km || |-id=507 bgcolor=#fefefe | 25507 || || — || December 9, 1999 || Oizumi || T. Kobayashi || — || align=right | 2.7 km || |-id=508 bgcolor=#fefefe | 25508 || || — || December 9, 1999 || Oizumi || T. Kobayashi || V || align=right | 2.4 km || |-id=509 bgcolor=#fefefe | 25509 Rodwong || || || December 7, 1999 || Socorro || LINEAR || NYS || align=right | 6.3 km || |-id=510 bgcolor=#fefefe | 25510 Donvincent || || || December 7, 1999 || Socorro || LINEAR || V || align=right | 2.3 km || |-id=511 bgcolor=#fefefe | 25511 Annlipinsky || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 2.7 km || |-id=512 bgcolor=#fefefe | 25512 Anncomins || || || December 7, 1999 || Socorro || LINEAR || slow || align=right | 3.6 km || |-id=513 bgcolor=#fefefe | 25513 Weseley || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 3.8 km || |-id=514 bgcolor=#E9E9E9 | 25514 Lisawu || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 4.2 km || |-id=515 bgcolor=#fefefe | 25515 Briancarey || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 2.8 km || |-id=516 bgcolor=#fefefe | 25516 Davidknight || || || December 7, 1999 || Socorro || LINEAR || NYS || align=right | 2.5 km || |-id=517 bgcolor=#fefefe | 25517 Davidlau || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 3.5 km || |-id=518 bgcolor=#E9E9E9 | 25518 Paulcitrin || || || December 7, 1999 || Socorro || LINEAR || PAD || align=right | 6.9 km || |-id=519 bgcolor=#fefefe | 25519 Bartolomeo || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=520 bgcolor=#fefefe | 25520 Deronchang || || || December 7, 1999 || Socorro || LINEAR || V || align=right | 2.5 km || |-id=521 bgcolor=#fefefe | 25521 Stevemorgan || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 4.4 km || |-id=522 bgcolor=#E9E9E9 | 25522 Roisen || || || December 7, 1999 || Socorro || LINEAR || — || align=right | 4.9 km || |-id=523 bgcolor=#E9E9E9 | 25523 || || — || December 10, 1999 || Oizumi || T. Kobayashi ||