| 21434 Stanchiang | March 31, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21436 Chaoyichi | March 31, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21437 Georgechen | March 31, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 39971 József | April 2, 1998 | Krisztián Sárneczky | asteroid |
| 20321 Lightdonovan | April 18, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20351 Kaborchardt | April 18, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20352 Pinakibose | April 19, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12086 Joshualevine | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12855 Tewksbury | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 16944 Wangler | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20323 Tomlindstom | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20324 Johnmahoney | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20329 Manfro | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20331 Bijemarks | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21450 Kissel | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21453 Victorlevine | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21454 Chernoby | April 20, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11716 Amahartman | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11718 Hayward | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11719 Hicklen | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11720 Horodyskyj | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11724 Ronaldhsu | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12093 Chrimatthews | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12094 Mazumder | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12519 Pullen | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20336 Gretamills | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20337 Naeve | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20338 Elainepappas | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20339 Eileenreed | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20343 Vaccariello | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20354 Rebeccachan | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21463 Nickerson | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21470 Frankchuang | April 21, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20345 Davidvito | April 23, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12095 Pinel | April 25, 1998 | Eric Walter Elst | small Solar System body |
| 12527 Anneraugh | May 1998 | Lowell Observatory Near-Earth-Object Search | asteroid |
| 12859 Marlamoore | May 18, 1998 | Lowell Observatory Near-Earth-Object Search | asteroid |
| 12860 Turney | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12866 Yanamadala | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20371 Ekladyous | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20372 Juliafanning | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20373 Fullmer | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20375 Sherrigerten | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20376 Joyhines | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 20379 Christijohns | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21503 Beksha | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21505 Bernert | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21506 Betsill | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21507 Bhasin | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21509 Lucascavin | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21512 Susieclary | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21513 Bethcochran | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21514 Gamalski | May 22, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 18730 Wingip | May 23, 1998 | Lowell Observatory Near-Earth-Object Search | asteroid |
| 21515 Gavini | May 23, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21516 Mariagodinez | May 23, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21518 Maysunhasan | May 23, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21519 Josephhenry | May 23, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12111 Ulm | June 1998 | Eric Walter Elst | asteroid |
| 21522 Entwisle | June 19, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |