— || align=right | 3.6 km || |-id=524 bgcolor=#E9E9E9 | 25524 || || — || December 11, 1999 || Oizumi || T. Kobayashi || GEF || align=right | 4.3 km || |-id=525 bgcolor=#E9E9E9 | 25525 || || — || December 11, 1999 || Socorro || LINEAR || EUN || align=right | 5.1 km || |-id=526 bgcolor=#fefefe | 25526 || || — || December 5, 1999 || Catalina || CSS || — || align=right | 2.5 km || |-id=527 bgcolor=#E9E9E9 | 25527 || || — || December 5, 1999 || Catalina || CSS || — || align=right | 3.8 km || |-id=528 bgcolor=#E9E9E9 | 25528 || || — || December 7, 1999 || Catalina || CSS || — || align=right | 7.9 km || |-id=529 bgcolor=#E9E9E9 | 25529 || || — || December 11, 1999 || Fountain Hills || C. W. Juels || — || align=right | 7.8 km || |-id=530 bgcolor=#fefefe | 25530 || || — || December 6, 1999 || Višnjan Observatory || K. Korlević || FLO || align=right | 2.4 km || |-id=531 bgcolor=#fefefe | 25531 Lessek || || || December 12, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=532 bgcolor=#E9E9E9 | 25532 || || — || December 12, 1999 || Socorro || LINEAR || EUN || align=right | 6.2 km || |-id=533 bgcolor=#E9E9E9 | 25533 || || — || December 2, 1999 || Kitt Peak || Spacewatch || — || align=right | 3.1 km || |-id=534 bgcolor=#d6d6d6 | 25534 || || — || December 2, 1999 || Kitt Peak || Spacewatch || — || align=right | 7.9 km || |-id=535 bgcolor=#E9E9E9 | 25535 || || — || December 15, 1999 || Fountain Hills || C. W. Juels || slow || align=right | 7.0 km || |-id=536 bgcolor=#E9E9E9 | 25536 || || — || December 15, 1999 || Fountain Hills || C. W. Juels || HNS || align=right | 5.5 km || |-id=537 bgcolor=#fefefe | 25537 || || — || December 8, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=538 bgcolor=#E9E9E9 | 25538 Markcarlson || || || December 8, 1999 || Socorro || LINEAR || — || align=right | 3.6 km || |-id=539 bgcolor=#E9E9E9 | 25539 Roberthelm || || || December 8, 1999 || Socorro || LINEAR || — || align=right | 5.1 km || |-id=540 bgcolor=#fefefe | 25540 || || — || December 8, 1999