| 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 |
| 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 |
| Gliese 876 b | June 23, 1998 | Geoffrey Marcy | exoplanet |
| 21527 Horton | June 24, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21528 Chrisfaust | June 24, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11369 Brazelton | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 11371 Camley | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12878 Erneschiller | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12880 Juliegrady | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 12881 Yepeiyu | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13258 Bej | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13259 Bhat | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13265 Terbunkley | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13269 Dahlstrom | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13274 Roygross | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13278 Grotecloss | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13281 Aliciahall | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13283 Dahart | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13285 Stephicks | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13710 Shridhar | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13714 Stainbrook | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13716 Trevino | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 13718 Welcker | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 14116 Ogea | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 14119 Johnprince | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21542 Kennajeannet | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21545 Koirala | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21548 Briekugler | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |
| 21552 Richardlee | August 17, 1998 | Lincoln Near-Earth Asteroid Research | asteroid |