1997 || Ondřejov || L. Kotková || — || align=right | 2.4 km || |-id=506 bgcolor=#fefefe | 22506 || || — || November 24, 1997 || Oizumi || T. Kobayashi || NYS || align=right | 2.6 km || |-id=507 bgcolor=#fefefe | 22507 || || — || November 29, 1997 || Socorro || LINEAR || NYS || align=right | 2.6 km || |-id=508 bgcolor=#d6d6d6 | 22508 || || — || November 29, 1997 || Socorro || LINEAR || THM || align=right | 7.0 km || |-id=509 bgcolor=#fefefe | 22509 || || — || December 24, 1997 || Oizumi || T. Kobayashi || — || align=right | 3.6 km || |-id=510 bgcolor=#fefefe | 22510 || || — || December 21, 1997 || Kitt Peak || Spacewatch || — || align=right | 2.2 km || |-id=511 bgcolor=#E9E9E9 | 22511 || || — || December 28, 1997 || Oizumi || T. Kobayashi || — || align=right | 3.0 km || |-id=512 bgcolor=#E9E9E9 | 22512 Cannat || || || January 28, 1998 || Caussols || ODAS || GER || align=right | 4.4 km || |-id=513 bgcolor=#fefefe | 22513 || || — || January 29, 1998 || Caussols || ODAS || FLO || align=right | 1.8 km || |-id=514 bgcolor=#fefefe | 22514 || || — || February 22, 1998 || Haleakala || NEAT || — || align=right | 7.2 km || |-id=515 bgcolor=#fefefe | 22515 || || — || February 22, 1998 || Haleakala || NEAT || V || align=right | 2.4 km || |-id=516 bgcolor=#E9E9E9 | 22516 || || — || February 26, 1998 || Kitt Peak || Spacewatch || — || align=right | 3.9 km || |-id=517 bgcolor=#fefefe | 22517 Alexzanardi || || || February 26, 1998 || Cima Ekar || M. Tombelli, G. Forti || — || align=right | 3.3 km || |-id=518 bgcolor=#fefefe | 22518 || || — || February 27, 1998 || La Silla || E. W. Elst || NYS || align=right | 2.9 km || |-id=519 bgcolor=#fefefe | 22519 Gerardklein || || || March 2, 1998 || Caussols || ODAS || — || align=right | 2.2 km || |-id=520 bgcolor=#fefefe | 22520 || || — || March 2, 1998 || Caussols || ODAS || — || align=right | 2.6 km || |-id=521 bgcolor=#fefefe | 22521 ZZ Top || || || March 2, 1998 || Caussols || ODAS || V || align=right | 1.4 km || |-id=522 bgcolor=#fefefe | 22522 ||