|-id=539 bgcolor=#E9E9E9 | 16539 || || — || August 5, 1991 || Palomar || H. E. Holt || — || align=right | 8.0 km || |-id=540 bgcolor=#E9E9E9 | 16540 || || — || August 7, 1991 || Palomar || H. E. Holt || EUN || align=right | 5.9 km || |-id=541 bgcolor=#d6d6d6 | 16541 || || — || August 8, 1991 || Palomar || H. E. Holt || KOR || align=right | 8.6 km || |-id=542 bgcolor=#d6d6d6 | 16542 || || — || August 14, 1991 || La Silla || E. W. Elst || — || align=right | 10 km || |-id=543 bgcolor=#fefefe | 16543 Rosetta || || || September 5, 1991 || Haute Provence || E. W. Elst || — || align=right | 3.8 km || |-id=544 bgcolor=#d6d6d6 | 16544 Hochlehnert || || || September 9, 1991 || Tautenburg Observatory || L. D. Schmadel, F. Börngen || CHA || align=right | 5.4 km || |-id=545 bgcolor=#fefefe | 16545 || || — || September 9, 1991 || Kiyosato || S. Otomo || — || align=right | 3.3 km || |-id=546 bgcolor=#d6d6d6 | 16546 || || — || September 13, 1991 || Palomar || H. E. Holt || ALA || align=right | 19 km || |-id=547 bgcolor=#E9E9E9 | 16547 || || — || September 7, 1991 || Palomar || E. F. Helin || — || align=right | 9.0 km || |-id=548 bgcolor=#fefefe | 16548 || || — || September 10, 1991 || Palomar || H. E. Holt || — || align=right | 3.2 km || |-id=549 bgcolor=#E9E9E9 | 16549 || || — || September 12, 1991 || Palomar || H. E. Holt || DOR || align=right | 13 km || |-id=550 bgcolor=#E9E9E9 | 16550 || || — || September 10, 1991 || Palomar || H. E. Holt || DOR || align=right | 8.7 km || |-id=551 bgcolor=#E9E9E9 | 16551 || || — || September 15, 1991 || Palomar || H. E. Holt || — || align=right | 7.8 km || |-id=552 bgcolor=#fefefe | 16552 Sawamura || 1991 SB || || September 16, 1991 || Kitami || K. Endate, K. Watanabe || — || align=right | 7.3 km || |-id=553 bgcolor=#fefefe | 16553 || || — || October 7, 1991 || Palomar || C. P. de Saint-Aignan || FLO || align=right | 2.3 km || |-id=554 bgcolor=#E9E9E9 | 16554 || || — || October 29, 1991 || Kushiro || S. Ueda, H.