|| align=right | 7.9 km || |-id=581 bgcolor=#fefefe | 12581 Rovinj || || || September 8, 1999 || Višnjan Observatory || Višnjan Obs. || NYS || align=right | 2.4 km || |-id=582 bgcolor=#fefefe | 12582 || || — || September 11, 1999 || Višnjan Observatory || Višnjan Obs. || — || align=right | 5.1 km || |-id=583 bgcolor=#d6d6d6 | 12583 Buckjean || || || September 11, 1999 || High Point || D. K. Chesney || — || align=right | 26 km || |-id=584 bgcolor=#fefefe | 12584 Zeljkoandreic || || || September 12, 1999 || Višnjan Observatory || K. Korlević || V || align=right | 2.6 km || |-id=585 bgcolor=#E9E9E9 | 12585 Katschwarz || || || September 7, 1999 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=586 bgcolor=#E9E9E9 | 12586 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 5.6 km || |-id=587 bgcolor=#E9E9E9 | 12587 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 6.7 km || |-id=588 bgcolor=#fefefe | 12588 || || — || September 7, 1999 || Socorro || LINEAR || — || align=right | 5.5 km || |-id=589 bgcolor=#fefefe | 12589 || || — || September 9, 1999 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=590 bgcolor=#E9E9E9 | 12590 || || — || September 9, 1999 || Socorro || LINEAR || — || align=right | 4.3 km || |-id=591 bgcolor=#fefefe | 12591 || || — || September 9, 1999 || Socorro || LINEAR || V || align=right | 3.9 km || |-id=592 bgcolor=#E9E9E9 | 12592 || || — || September 9, 1999 || Socorro || LINEAR || — || align=right | 4.6 km || |-id=593 bgcolor=#fefefe | 12593 Shashlov || || || September 9, 1999 || Socorro || LINEAR || — || align=right | 3.0 km || |-id=594 bgcolor=#E9E9E9 | 12594 || || — || September 9, 1999 || Socorro || LINEAR || — || align=right | 7.5 km || |-id=595 bgcolor=#fefefe | 12595 Amandashaw || || || September 9, 1999 || Socorro || LINEAR || FLO || align=right | 4.8 km || |-id=596 bgcolor=#fefefe | 12596 Shukla || || || September 9, 1999 || Socorro || LINEAR || — || align=right | 3.4 km || |-id=597 bgcolor=#d6d6d6 | 12597 || || — || September 9, 1999 || Socorro || LINEAR || KOR