|| Catalina || CSS || — || align=right | 3.7 km || |-id=495 bgcolor=#E9E9E9 | 177495 || || — || March 15, 2004 || Socorro || LINEAR || — || align=right | 1.4 km || |-id=496 bgcolor=#E9E9E9 | 177496 || || — || March 15, 2004 || Catalina || CSS || — || align=right | 2.4 km || |-id=497 bgcolor=#E9E9E9 | 177497 || || — || March 15, 2004 || Catalina || CSS || — || align=right | 2.0 km || |-id=498 bgcolor=#E9E9E9 | 177498 || || — || March 15, 2004 || Catalina || CSS || — || align=right | 2.0 km || |-id=499 bgcolor=#E9E9E9 | 177499 || || — || March 12, 2004 || Palomar || NEAT || — || align=right data-sort-value="0.99" | 990 m || |-id=500 bgcolor=#E9E9E9 | 177500 || || — || March 15, 2004 || Catalina || CSS || WAT || align=right | 3.8 km || |} 177501–177600 |-bgcolor=#E9E9E9 | 177501 || || — || March 15, 2004 || Socorro || LINEAR || — || align=right | 2.9 km || |-id=502 bgcolor=#E9E9E9 | 177502 || || — || March 15, 2004 || Socorro || LINEAR || — || align=right | 2.6 km || |-id=503 bgcolor=#E9E9E9 | 177503 || || — || March 15, 2004 || Socorro || LINEAR || GEF || align=right | 2.2 km || |-id=504 bgcolor=#E9E9E9 | 177504 || || — || March 14, 2004 || Palomar || NEAT || — || align=right | 2.1 km || |-id=505 bgcolor=#E9E9E9 | 177505 || || — || March 14, 2004 || Palomar || NEAT || RAF || align=right | 1.6 km || |-id=506 bgcolor=#E9E9E9 | 177506 || || — || March 15, 2004 || Catalina || CSS || — || align=right | 1.8 km || |-id=507 bgcolor=#E9E9E9 | 177507 || || — || March 15, 2004 || Socorro || LINEAR || EUN || align=right | 1.4 km || |-id=508 bgcolor=#E9E9E9 | 177508 || || — || March 15, 2004 || Palomar || NEAT || — || align=right | 4.1 km || |-id=509 bgcolor=#E9E9E9 | 177509 || || — || March 15, 2004 || Palomar || NEAT || — || align=right | 2.8 km || |-id=510 bgcolor=#E9E9E9 | 177510 || || — || March 14, 2004 || Socorro || LINEAR || INO || align=right | 1.9 km || |-id=511 bgcolor=#E9E9E9 | 177511 || || — || March 14, 2004 || Socorro || LINEAR || KRM ||