1997 || Oohira || T. Urata || — || align=right | 4.6 km || |-id=643 bgcolor=#fefefe | 23643 || || — || January 12, 1997 || Haleakala || NEAT || — || align=right | 2.9 km || |-id=644 bgcolor=#fefefe | 23644 Yamaneko || || || January 13, 1997 || Kuma Kogen || A. Nakamura || MAS || align=right | 2.3 km || |-id=645 bgcolor=#fefefe | 23645 || || — || January 30, 1997 || Oizumi || T. Kobayashi || V || align=right | 1.9 km || |-id=646 bgcolor=#fefefe | 23646 || || — || January 30, 1997 || Oizumi || T. Kobayashi || — || align=right | 2.3 km || |-id=647 bgcolor=#fefefe | 23647 || || — || January 31, 1997 || Oizumi || T. Kobayashi || PHO || align=right | 3.1 km || |-id=648 bgcolor=#fefefe | 23648 Kolář || 1997 CB || || February 1, 1997 || Ondřejov || L. Kotková || — || align=right | 4.2 km || |-id=649 bgcolor=#fefefe | 23649 Tohoku || || || February 1, 1997 || Chichibu || N. Satō || MAS || align=right | 2.1 km || |-id=650 bgcolor=#fefefe | 23650 Čvančara || || || February 7, 1997 || Kleť || M. Tichý || FLO || align=right | 1.5 km || |-id=651 bgcolor=#E9E9E9 | 23651 || || — || February 3, 1997 || Kitt Peak || Spacewatch || — || align=right | 2.4 km || |-id=652 bgcolor=#fefefe | 23652 || || — || February 12, 1997 || Oizumi || T. Kobayashi || NYS || align=right | 1.9 km || |-id=653 bgcolor=#fefefe | 23653 || || — || February 6, 1997 || Kitt Peak || Spacewatch || NYS || align=right | 2.7 km || |-id=654 bgcolor=#fefefe | 23654 || || — || February 13, 1997 || Oohira || T. Urata || NYS || align=right | 2.0 km || |-id=655 bgcolor=#fefefe | 23655 || || — || February 14, 1997 || Oizumi || T. Kobayashi || — || align=right | 2.8 km || |-id=656 bgcolor=#fefefe | 23656 || || — || February 14, 1997 || Oizumi || T. Kobayashi || — || align=right | 3.0 km || |-id=657 bgcolor=#fefefe | 23657 || || — || February 6, 1997 || Xinglong || SCAP || — || align=right | 3.6 km || |-id=658 bgcolor=#fefefe | 23658 || || — || February 6, 1997 || Xinglong || SCAP || MAS || align=right | 1.9 km || |-id=659 bgcolor=#fefefe