4.5 km || |-id=529 bgcolor=#fefefe | 177529 || || — || March 16, 2004 || Socorro || LINEAR || — || align=right | 2.3 km || |-id=530 bgcolor=#E9E9E9 | 177530 || || — || March 16, 2004 || Kitt Peak || Spacewatch || AGN || align=right | 1.6 km || |-id=531 bgcolor=#E9E9E9 | 177531 || || — || March 16, 2004 || Kitt Peak || Spacewatch || — || align=right | 1.4 km || |-id=532 bgcolor=#E9E9E9 | 177532 || || — || March 17, 2004 || Kitt Peak || Spacewatch || — || align=right | 3.0 km || |-id=533 bgcolor=#E9E9E9 | 177533 || || — || March 17, 2004 || Socorro || LINEAR || MAR || align=right | 1.8 km || |-id=534 bgcolor=#E9E9E9 | 177534 || || — || March 17, 2004 || Kitt Peak || Spacewatch || WIT || align=right | 1.5 km || |-id=535 bgcolor=#E9E9E9 | 177535 || || — || March 27, 2004 || Bergisch Gladbach || W. Bickel || — || align=right | 4.6 km || |-id=536 bgcolor=#E9E9E9 | 177536 || || — || March 16, 2004 || Socorro || LINEAR || RAF || align=right | 1.6 km || |-id=537 bgcolor=#E9E9E9 | 177537 || || — || March 17, 2004 || Kitt Peak || Spacewatch || — || align=right | 4.4 km || |-id=538 bgcolor=#E9E9E9 | 177538 || || — || March 18, 2004 || Socorro || LINEAR || MAR || align=right | 2.0 km || |-id=539 bgcolor=#E9E9E9 | 177539 || || — || March 18, 2004 || Socorro || LINEAR || — || align=right | 3.3 km || |-id=540 bgcolor=#E9E9E9 | 177540 || || — || March 20, 2004 || Socorro || LINEAR || NEM || align=right | 5.3 km || |-id=541 bgcolor=#E9E9E9 | 177541 || || — || March 20, 2004 || Socorro || LINEAR || — || align=right | 3.1 km || |-id=542 bgcolor=#E9E9E9 | 177542 || || — || March 18, 2004 || Kitt Peak || Spacewatch || — || align=right | 2.7 km || |-id=543 bgcolor=#E9E9E9 | 177543 || || — || March 19, 2004 || Socorro || LINEAR || — || align=right | 3.7 km || |-id=544 bgcolor=#E9E9E9 | 177544 || || — || March 19, 2004 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=545 bgcolor=#E9E9E9 | 177545 || || — || March 19, 2004 || Socorro || LINEAR || GEF || align=right | 2.3