|| — || align=right | 6.6 km || |-id=506 bgcolor=#fefefe | 39506 || || — || March 7, 1981 || Siding Spring || S. J. Bus || — || align=right | 1.7 km || |-id=507 bgcolor=#d6d6d6 | 39507 || || — || March 7, 1981 || Siding Spring || S. J. Bus || — || align=right | 6.1 km || |-id=508 bgcolor=#d6d6d6 | 39508 || || — || March 2, 1981 || Siding Spring || S. J. Bus || — || align=right | 5.5 km || |-id=509 bgcolor=#E9E9E9 | 39509 Kardashev || || || October 22, 1981 || Nauchnij || N. S. Chernykh || DOR || align=right | 7.7 km || |-id=510 bgcolor=#d6d6d6 | 39510 || 1982 DU || — || February 21, 1982 || Anderson Mesa || E. Bowell || — || align=right | 17 km || |-id=511 bgcolor=#fefefe | 39511 || || — || September 18, 1985 || La Silla || H. Debehogne || NYS || align=right | 5.1 km || |-id=512 bgcolor=#fefefe | 39512 || || — || October 15, 1985 || Anderson Mesa || E. Bowell || NYS || align=right | 2.3 km || |-id=513 bgcolor=#fefefe | 39513 || || — || August 26, 1986 || La Silla || H. Debehogne || — || align=right | 3.1 km || |-id=514 bgcolor=#fefefe | 39514 || || — || October 4, 1986 || Kleť || A. Mrkos || — || align=right | 3.0 km || |-id=515 bgcolor=#fefefe | 39515 || || — || December 4, 1986 || Kleť || A. Mrkos || — || align=right | 4.9 km || |-id=516 bgcolor=#E9E9E9 | 39516 Lusigny || 1987 OO || || July 27, 1987 || Haute Provence || E. W. Elst || — || align=right | 3.7 km || |-id=517 bgcolor=#fefefe | 39517 || || — || February 11, 1988 || La Silla || E. W. Elst || — || align=right | 2.6 km || |-id=518 bgcolor=#E9E9E9 | 39518 || || — || February 13, 1988 || La Silla || E. W. Elst || — || align=right | 9.8 km || |-id=519 bgcolor=#fefefe | 39519 || || — || February 13, 1988 || La Silla || E. W. Elst || V || align=right | 1.7 km || |-id=520 bgcolor=#fefefe | 39520 || 1988 NY || — || July 12, 1988 || Palomar || E. F. Helin || PHO || align=right | 3.7 km || |-id=521 bgcolor=#fefefe | 39521 || 1988