W. Elst || — || align=right | 3.6 km || |-id=290 bgcolor=#fefefe | 12290 || 1991 LZ || — || June 14, 1991 || Palomar || E. F. Helin || — || align=right | 3.6 km || |-id=291 bgcolor=#d6d6d6 | 12291 Gohnaumann || || || June 6, 1991 || La Silla || E. W. Elst || — || align=right | 13 km || |-id=292 bgcolor=#d6d6d6 | 12292 Dalton || || || June 6, 1991 || La Silla || E. W. Elst || HYG || align=right | 11 km || |-id=293 bgcolor=#fefefe | 12293 || || — || July 13, 1991 || Palomar || H. E. Holt || V || align=right | 4.0 km || |-id=294 bgcolor=#fefefe | 12294 Avogadro || || || August 2, 1991 || La Silla || E. W. Elst || — || align=right | 4.3 km || |-id=295 bgcolor=#fefefe | 12295 Tasso || || || August 2, 1991 || La Silla || E. W. Elst || NYS || align=right | 4.2 km || |-id=296 bgcolor=#fefefe | 12296 || || — || August 5, 1991 || Palomar || H. E. Holt || NYS || align=right | 3.4 km || |-id=297 bgcolor=#fefefe | 12297 || || — || August 6, 1991 || Palomar || H. E. Holt || — || align=right | 3.9 km || |-id=298 bgcolor=#fefefe | 12298 Brecht || || || August 6, 1991 || Tautenburg Observatory || F. Börngen || KLI || align=right | 6.6 km || |-id=299 bgcolor=#fefefe | 12299 || || — || August 7, 1991 || Palomar || H. E. Holt || NYS || align=right | 3.3 km || |-id=300 bgcolor=#fefefe | 12300 || || — || September 10, 1991 || Palomar || H. E. Holt || — || align=right | 4.1 km || |} 12301–12400 |-bgcolor=#fefefe | 12301 Eötvös || || || September 4, 1991 || La Silla || E. W. Elst || — || align=right | 2.9 km || |-id=302 bgcolor=#fefefe | 12302 || || — || September 13, 1991 || Palomar || H. E. Holt || NYS || align=right | 3.0 km || |-id=303 bgcolor=#fefefe | 12303 || || — || September 11, 1991 || Palomar || H. E. Holt || — || align=right | 2.9 km || |-id=304 bgcolor=#E9E9E9 | 12304 || || — || September 19, 1991 || Kiyosato || S. Otomo || EUN || align=right | 6.6 km || |-id=305 bgcolor=#E9E9E9 | 12305 || || — ||