10, 1999 || Anderson Mesa || LONEOS || — || align=right | 2.0 km || |-id=416 bgcolor=#fefefe | 31416 Peteworden || || || January 15, 1999 || Caussols || ODAS || NYS || align=right | 2.3 km || |-id=417 bgcolor=#fefefe | 31417 || || — || January 15, 1999 || Kitt Peak || Spacewatch || V || align=right | 3.5 km || |-id=418 bgcolor=#fefefe | 31418 Sosaoyarzabal || || || January 14, 1999 || Anderson Mesa || LONEOS || FLO || align=right | 2.3 km || |-id=419 bgcolor=#fefefe | 31419 || || — || January 6, 1999 || Anderson Mesa || LONEOS || — || align=right | 1.6 km || |-id=420 bgcolor=#fefefe | 31420 || 1999 BV || — || January 16, 1999 || Fair Oaks Ranch || J. V. McClusky || FLO || align=right | 1.9 km || |-id=421 bgcolor=#E9E9E9 | 31421 || 1999 BZ || — || January 17, 1999 || Catalina || CSS || HNS || align=right | 5.1 km || |-id=422 bgcolor=#fefefe | 31422 || || — || January 16, 1999 || High Point || D. K. Chesney || FLO || align=right | 2.1 km || |-id=423 bgcolor=#fefefe | 31423 || || — || January 18, 1999 || Oizumi || T. Kobayashi || V || align=right | 2.0 km || |-id=424 bgcolor=#fefefe | 31424 || || — || January 18, 1999 || Oizumi || T. Kobayashi || — || align=right | 3.1 km || |-id=425 bgcolor=#fefefe | 31425 || || — || January 16, 1999 || Kushiro || S. Ueda, H. Kaneda || — || align=right | 5.1 km || |-id=426 bgcolor=#fefefe | 31426 Davidlouapre || || || January 19, 1999 || Caussols || ODAS || — || align=right | 3.8 km || |-id=427 bgcolor=#fefefe | 31427 || || — || January 20, 1999 || Višnjan Observatory || K. Korlević || MAS || align=right | 2.3 km || |-id=428 bgcolor=#fefefe | 31428 || || — || January 20, 1999 || Caussols || ODAS || — || align=right | 3.4 km || |-id=429 bgcolor=#fefefe | 31429 Diegoazzaro || || || January 21, 1999 || Colleverde || V. S. Casulli || V || align=right | 2.5 km || |-id=430 bgcolor=#fefefe | 31430 || || — || January 22, 1999 || Višnjan Observatory || K. Korlević || NYS || align=right | 3.1 km || |-id=431 bgcolor=#E9E9E9 | 31431 Cabibbo || || || January 21, 1999 || Bologna || San