EUN || align=right | 3.7 km || |-id=490 bgcolor=#fefefe | 42490 || 1991 SU || — || September 30, 1991 || Siding Spring || R. H. McNaught || — || align=right | 3.9 km || |-id=491 bgcolor=#E9E9E9 | 42491 || 1991 TF || — || October 1, 1991 || Siding Spring || R. H. McNaught || JUN || align=right | 2.7 km || |-id=492 bgcolor=#fefefe | 42492 Brüggenthies || || || October 3, 1991 || Tautenburg Observatory || L. D. Schmadel, F. Börngen || — || align=right | 2.1 km || |-id=493 bgcolor=#d6d6d6 | 42493 || || — || October 2, 1991 || Palomar || C. P. de Saint-Aignan || — || align=right | 12 km || |-id=494 bgcolor=#E9E9E9 | 42494 || || — || October 29, 1991 || Kitt Peak || Spacewatch || RAF || align=right | 3.7 km || |-id=495 bgcolor=#E9E9E9 | 42495 || || — || November 11, 1991 || Kitt Peak || Spacewatch || — || align=right | 2.5 km || |-id=496 bgcolor=#E9E9E9 | 42496 || || — || December 13, 1991 || Kiyosato || S. Otomo || JUN || align=right | 9.0 km || |-id=497 bgcolor=#E9E9E9 | 42497 || || — || January 30, 1992 || La Silla || E. W. Elst || — || align=right | 5.8 km || |-id=498 bgcolor=#E9E9E9 | 42498 || || — || February 29, 1992 || La Silla || UESAC || — || align=right | 3.3 km || |-id=499 bgcolor=#fefefe | 42499 || || — || August 6, 1992 || Palomar || H. E. Holt || FLO || align=right | 2.6 km || |-id=500 bgcolor=#d6d6d6 | 42500 || || — || September 2, 1992 || La Silla || E. W. Elst || THMslow || align=right | 8.6 km || |} 42501–42600 |-bgcolor=#FA8072 | 42501 || 1992 YC || — || December 17, 1992 || Caussols || C. Pollas || — || align=right | 3.0 km || |-id=502 bgcolor=#E9E9E9 | 42502 || || — || February 10, 1993 || Kushiro || S. Ueda, H. Kaneda || — || align=right | 3.7 km || |-id=503 bgcolor=#E9E9E9 | 42503 || || — || March 17, 1993 || La Silla || UESAC || — || align=right | 3.5 km || |-id=504 bgcolor=#E9E9E9 | 42504 || || — || March 17, 1993 || La Silla || UESAC || — || align=right | 4.4 km || |-id=505 bgcolor=#fefefe | 42505 || || — || March