| 2.9 km || |-id=485 bgcolor=#fefefe | 21485 Ash || || || April 20, 1998 || Socorro || LINEAR || V || align=right | 2.2 km || |-id=486 bgcolor=#fefefe | 21486 || || — || April 25, 1998 || La Silla || E. W. Elst || — || align=right | 4.1 km || |-id=487 bgcolor=#d6d6d6 | 21487 || || — || April 25, 1998 || La Silla || E. W. Elst || — || align=right | 7.9 km || |-id=488 bgcolor=#fefefe | 21488 Danyellelee || || || April 21, 1998 || Socorro || LINEAR || — || align=right | 2.2 km || |-id=489 bgcolor=#fefefe | 21489 || 1998 JU || — || May 1, 1998 || Haleakala || NEAT || — || align=right | 5.0 km || |-id=490 bgcolor=#E9E9E9 | 21490 || 1998 JW || — || May 1, 1998 || Haleakala || NEAT || — || align=right | 6.6 km || |-id=491 bgcolor=#fefefe | 21491 || || — || May 1, 1998 || Haleakala || NEAT || NYS || align=right | 1.8 km || |-id=492 bgcolor=#fefefe | 21492 || || — || May 1, 1998 || Haleakala || NEAT || — || align=right | 2.9 km || |-id=493 bgcolor=#fefefe | 21493 || || — || May 1, 1998 || Haleakala || NEAT || NYS || align=right | 7.8 km || |-id=494 bgcolor=#fefefe | 21494 || || — || May 1, 1998 || Haleakala || NEAT || NYS || align=right | 2.8 km || |-id=495 bgcolor=#fefefe | 21495 Feaga || || || May 1, 1998 || Anderson Mesa || LONEOS || — || align=right | 3.6 km || |-id=496 bgcolor=#E9E9E9 | 21496 Lijianyang || || || May 1, 1998 || Anderson Mesa || LONEOS || — || align=right | 7.3 km || |-id=497 bgcolor=#fefefe | 21497 Alicehine || || || May 1, 1998 || Anderson Mesa || LONEOS || — || align=right | 2.4 km || |-id=498 bgcolor=#fefefe | 21498 Keenanferar || || || May 22, 1998 || Socorro || LINEAR || PHO || align=right | 3.9 km || |-id=499 bgcolor=#fefefe | 21499 Perillat || || || May 22, 1998 || Anderson Mesa || LONEOS || — || align=right | 4.2 km || |-id=500 bgcolor=#fefefe | 21500 Vazquez || || || May 22, 1998 || Anderson Mesa || LONEOS || — || align=right | 4.8 km || |} 21501–21600 |-bgcolor=#fefefe | 21501 Acevedo || || || May 23, 1998 ||