Višnjan Observatory || K. Korlević || — || align=right | 2.6 km || |-id=542 bgcolor=#d6d6d6 | 44542 || || — || January 9, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 7.5 km || |-id=543 bgcolor=#d6d6d6 | 44543 || || — || January 9, 1999 || Anderson Mesa || LONEOS || — || align=right | 6.3 km || |-id=544 bgcolor=#E9E9E9 | 44544 || || — || January 14, 1999 || Anderson Mesa || LONEOS || MAR || align=right | 6.5 km || |-id=545 bgcolor=#d6d6d6 | 44545 || || — || January 13, 1999 || Fair Oaks Ranch || J. V. McClusky || — || align=right | 8.0 km || |-id=546 bgcolor=#d6d6d6 | 44546 || 1999 BR || — || January 16, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 6.8 km || |-id=547 bgcolor=#d6d6d6 | 44547 || || — || January 19, 1999 || Needville || Needville Obs. || 7:4 || align=right | 11 km || |-id=548 bgcolor=#d6d6d6 | 44548 || || — || January 20, 1999 || Višnjan Observatory || K. Korlević || — || align=right | 6.1 km || |-id=549 bgcolor=#d6d6d6 | 44549 || || — || January 24, 1999 || Višnjan Observatory || K. Korlević || 3:2 || align=right | 13 km || |-id=550 bgcolor=#d6d6d6 | 44550 || || — || January 18, 1999 || Socorro || LINEAR || — || align=right | 14 km || |-id=551 bgcolor=#d6d6d6 | 44551 || || — || January 17, 1999 || Kitt Peak || Spacewatch || LIX || align=right | 13 km || |-id=552 bgcolor=#d6d6d6 | 44552 || || — || January 17, 1999 || Kitt Peak || Spacewatch || — || align=right | 12 km || |-id=553 bgcolor=#E9E9E9 | 44553 || || — || February 12, 1999 || Gekko || T. Kagawa || — || align=right | 12 km || |-id=554 bgcolor=#E9E9E9 | 44554 || || — || February 14, 1999 || Oizumi || T. Kobayashi || — || align=right | 3.7 km || |-id=555 bgcolor=#fefefe | 44555 || || — || February 12, 1999 || Socorro || LINEAR || H || align=right | 2.1 km || |-id=556 bgcolor=#E9E9E9 | 44556 || || — || February 10, 1999 || Socorro || LINEAR || EUN || align=right | 5.4 km || |-id=557 bgcolor=#d6d6d6 | 44557 || || — || February 10, 1999 || Socorro || LINEAR || — || align=right | 8.5