bgcolor=#d6d6d6 | 49574 || || — || February 11, 1999 || Socorro || LINEAR || TIR || align=right | 5.9 km || |-id=575 bgcolor=#E9E9E9 | 49575 || || — || February 11, 1999 || Socorro || LINEAR || EUN || align=right | 4.0 km || |-id=576 bgcolor=#E9E9E9 | 49576 || || — || February 11, 1999 || Socorro || LINEAR || HNS || align=right | 5.6 km || |-id=577 bgcolor=#E9E9E9 | 49577 || || — || February 11, 1999 || Socorro || LINEAR || — || align=right | 7.0 km || |-id=578 bgcolor=#E9E9E9 | 49578 || || — || February 11, 1999 || Socorro || LINEAR || MAR || align=right | 4.2 km || |-id=579 bgcolor=#E9E9E9 | 49579 || || — || February 11, 1999 || Socorro || LINEAR || MAR || align=right | 3.6 km || |-id=580 bgcolor=#E9E9E9 | 49580 || || — || February 11, 1999 || Socorro || LINEAR || — || align=right | 4.1 km || |-id=581 bgcolor=#d6d6d6 | 49581 || || — || February 11, 1999 || Socorro || LINEAR || — || align=right | 10 km || |-id=582 bgcolor=#E9E9E9 | 49582 || || — || February 11, 1999 || Outside Phoenix, Arizona || LINEAR || EUN || align=right | 5.0 km || |-id=583 bgcolor=#fefefe | 49583 || || — || February 9, 1999 || Kitt Peak || Spacewatch || NYS || align=right | 2.0 km || |-id=584 bgcolor=#d6d6d6 | 49584 || || — || February 7, 1999 || Kitt Peak || Spacewatch || THM || align=right | 7.6 km || |-id=585 bgcolor=#d6d6d6 | 49585 || || — || February 9, 1999 || Kitt Peak || Spacewatch || THM || align=right | 8.2 km || |-id=586 bgcolor=#d6d6d6 | 49586 || || — || February 11, 1999 || Kitt Peak || Spacewatch || slow? || align=right | 6.0 km || |-id=587 bgcolor=#d6d6d6 | 49587 || || — || February 8, 1999 || Kitt Peak || Spacewatch || — || align=right | 6.8 km || |-id=588 bgcolor=#d6d6d6 | 49588 || || — || February 13, 1999 || Kitt Peak || Spacewatch || — || align=right | 5.3 km || |-id=589 bgcolor=#d6d6d6 | 49589 || || — || February 13, 1999 || Kitt Peak || Spacewatch || — || align=right | 6.4 km || |-id=590 bgcolor=#d6d6d6 | 49590 || || — || February 18, 1999 || Haleakala || NEAT || — || align=right | 6.4 km || |-id=591