F. Börngen || FLO || align=right | 1.7 km || |-id=537 bgcolor=#E9E9E9 | 39537 || || — || November 12, 1990 || Yorii || M. Arai, H. Mori || GEF || align=right | 5.9 km || |-id=538 bgcolor=#fefefe | 39538 || || — || March 20, 1991 || La Silla || H. Debehogne || NYS || align=right | 2.6 km || |-id=539 bgcolor=#d6d6d6 | 39539 Emmadesmet || || || April 8, 1991 || La Silla || E. W. Elst || EMA || align=right | 13 km || |-id=540 bgcolor=#fefefe | 39540 Borchert || || || April 11, 1991 || Tautenburg Observatory || F. Börngen || — || align=right | 1.9 km || |-id=541 bgcolor=#fefefe | 39541 || 1991 LA || — || June 3, 1991 || Kitt Peak || Spacewatch || — || align=right | 1.1 km || |-id=542 bgcolor=#fefefe | 39542 || || — || August 2, 1991 || La Silla || E. W. Elst || NYS || align=right | 1.7 km || |-id=543 bgcolor=#E9E9E9 | 39543 Aubriet || || || August 6, 1991 || La Silla || E. W. Elst || — || align=right | 7.8 km || |-id=544 bgcolor=#E9E9E9 | 39544 || || — || October 7, 1991 || Palomar || C. P. de Saint-Aignan || — || align=right | 4.0 km || |-id=545 bgcolor=#E9E9E9 | 39545 || || — || February 25, 1992 || Kitt Peak || Spacewatch || DOR || align=right | 6.2 km || |-id=546 bgcolor=#E9E9E9 | 39546 || || — || February 29, 1992 || La Silla || UESAC || HOFslow || align=right | 7.5 km || |-id=547 bgcolor=#E9E9E9 | 39547 || || — || February 29, 1992 || La Silla || UESAC || — || align=right | 4.1 km || |-id=548 bgcolor=#E9E9E9 | 39548 || || — || February 29, 1992 || La Silla || UESAC || AGN || align=right | 3.6 km || |-id=549 bgcolor=#E9E9E9 | 39549 Casals || || || February 27, 1992 || Tautenburg Observatory || F. Börngen || — || align=right | 6.7 km || |-id=550 bgcolor=#E9E9E9 | 39550 || || — || March 1, 1992 || La Silla || UESAC || — || align=right | 5.3 km || |-id=551 bgcolor=#fefefe | 39551 || || — || March 2, 1992 || La Silla || UESAC || — || align=right | 2.8 km || |-id=552 bgcolor=#E9E9E9 | 39552 || || — || March 2, 1992 || La Silla ||