List of unnumbered minor planets: 1998

This is a partial list of unnumbered minor planets for principal provisional designations assigned between 1 January and 31 December 1998. , a total of 180 bodies remain unnumbered for this period. Also see previous and next year.

A

|- id="1998 AK10" bgcolor=#FA8072 | 6 || || MCA || 20.9 || data-sort-value="0.20" | 200 m || single || 33 days || 02 Feb 1998 || 26 || align=left | Disc.: Spacewatch || |- id="1998 AA12" bgcolor=#fefefe | 0 || || MBA-I || 18.72 || data-sort-value="0.54" | 540 m || multiple || 1998–2021 || 15 Apr 2021 || 42 || align=left | Disc.: Spacewatch ||

B

|- id="1998 BY7" bgcolor=#FFC2E0 | 0 || || APO || 21.47 || data-sort-value="0.18" | 180 m || multiple || 1998–2021 || 04 Aug 2021 || 156 || align=left | Disc.: SpacewatchPotentially hazardous object || |- id="1998 BT13" bgcolor=#FFC2E0 | 7 || || APO || 26.5 || data-sort-value="0.018" | 18 m || single || 6 days || 30 Jan 1998 || 15 || align=left | Disc.: Spacewatch || |- id="1998 BZ13" bgcolor=#fefefe | 2 || || MBA-I || 19.39 || data-sort-value="0.45" | 410 m || multiple || 1998–2023 || 27 Mar 2023 || 42 || align=left | Disc.: SpacewatchAlt.: 2016 EF148 || |- id="1998 BR26" bgcolor=#FFC2E0 | 7 || || APO || 26.0 || data-sort-value="0.022" | 22 m || single || 1 day || 31 Jan 1998 || 19 || align=left | Disc.: Spacewatch || |- id="1998 BC34" bgcolor=#d6d6d6 | 7 || || MBA-O || 20.8 || data-sort-value="0.39" | 390 m || single || 11 days || 02 Feb 1998 || 15 || align=left | Disc.: SpacewatchMCA at MPC ||

D

|- id="1998 DO11" bgcolor=#d6d6d6 | 0 || || MBA-O || 16.6 || 2.7 km || multiple || 1998–2021 || 10 Jun 2021 || 203 || align=left | Disc.: NEAT/GEODSSAlt.: 2014 YJ47 || |- id="1998 DX11" bgcolor=#FFC2E0 | 6 || || APO || 27.0 || data-sort-value="0.014" | 14 m || single || 3 days || 26 Feb 1998 || 13 || align=left | Disc.: Spacewatch || |- id="1998 DV20" bgcolor=#FFC2E0 | 8 || || APO || 20.3 || data-sort-value="0.31" | 310 m || single || 10 days || 06 Mar 1998 || 11 || align=left | Disc.: Spacewatch || |- id="1998 DH22" bgcolor=#fefefe | 0 || || MBA-I || 19.9 || data-sort-value="0.31" | 310 m || multiple || 1998–2021 || 17 Feb 2021 || 141 || align=left | Disc.: SpacewatchAdded on 17 June 2021Alt.: 2011 BR143 || |- id="1998 DM25" bgcolor=#fefefe | 0 || || MBA-I || 18.9 || data-sort-value="0.49" | 490 m || multiple || 1998–2021 || 10 Apr 2021 || 35 || align=left | —Added on 29 January 2022 || |- id="1998 DF26" bgcolor=#fefefe | 0 || || MBA-I || 18.96 || data-sort-value="0.48" | 480 m || multiple || 1998–2021 || 08 May 2021 || 43 || align=left | Disc.: Spacewatch || |- id="1998 DK36" bgcolor=#FFC2E0 | 7 || || ATI || 25.0 || data-sort-value="0.036" | 36 m || single || 1 day || 24 Feb 1998 || 4 || align=left | Disc.: Mauna Kea Obs. ||

E

|- id="1998 EE3" bgcolor=#FFC2E0 | 3 || || APO || 27.2 || data-sort-value="0.013" | 13 m || single || 3 days || 04 Mar 1998 || 11 || align=left | Disc.: Spacewatch || |- id="1998 EO3" bgcolor=#fefefe | 1 || || MBA-I || 18.7 || data-sort-value="0.54" | 540 m || multiple || 1998–2020 || 15 May 2020 || 35 || align=left | Disc.: SpacewatchAdded on 19 October 2020 || |- id="1998 EP4" bgcolor=#FFC2E0 | 2 || || APO || 21.5 || data-sort-value="0.18" | 180 m || multiple || 1996–1998 || 05 Apr 1998 || 71 || align=left | Disc.: Spacewatch ||

F

|- id="1998 FL5" bgcolor=#FFC2E0 | 0 || || APO || 21.52 || data-sort-value="0.17" | 170 m || multiple || 1998–2022 || 19 Oct 2022 || 114 || align=left | Disc.: LINEAR || |- id="1998 FM9" bgcolor=#FFC2E0 | 0 || || AMO || 19.70 || data-sort-value="0.41" | 410 m || multiple || 1998–2022 || 22 Jan 2022 || 121 || align=left | Disc.: LINEAR || |- id="1998 FS11" bgcolor=#FA8072 | 1 || || MCA || 19.69 || data-sort-value="0.39" | 390 m || multiple || 1998–2025 || 11 Dec 2025 || 87 || align=left | Disc.: NEAT/GEODSS || |- id="1998 FG12" bgcolor=#FFC2E0 | 6 || || APO || 21.0 || data-sort-value="0.22" | 220 m || single || 39 days || 02 May 1998 || 42 || align=left | Disc.: LINEAR || |- id="1998 FS144" bgcolor=#C2E0FF | 4 || || TNO || 6.7 || 235 km || multiple || 1998–2022 || 26 Apr 2022 || 22 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano (hot), BR-mag: 1.53; taxonomy: IR ||

G

|- id="1998 GC1" bgcolor=#FFC2E0 | 0 || || AMO || 21.27 || data-sort-value="0.23" | 210 m || multiple || 1998–2023 || 10 Dec 2023 || 95 || align=left | Disc.: LINEAR || |- id="1998 GL10" bgcolor=#FFC2E0 | 0 || || AMO || 19.09 || data-sort-value="0.56" | 560 m || multiple || 1998–2025 || 18 Oct 2025 || 289 || align=left | Disc.: LINEARAlt.: 22014 UW34 || |- id="1998 GM10" bgcolor=#FA8072 | 1 || || MCA || 19.3 || data-sort-value="0.41" | 410 m || multiple || 1998–2021 || 19 Jun 2021 || 84 || align=left | Disc.: LINEARAlt.: 2021 ES4 ||

H

|- id="1998 HH1" bgcolor=#FFC2E0 | 4 || || AMO || 23.2 || data-sort-value="0.081" | 81 m || single || 32 days || 19 May 1998 || 40 || align=left | Disc.: Spacewatch || |- id="1998 HM1" bgcolor=#FFC2E0 | 3 || || APO || 24.4 || data-sort-value="0.047" | 47 m || single || 7 days || 25 Apr 1998 || 33 || align=left | Disc.: Spacewatch || |- id="1998 HZ7" bgcolor=#d6d6d6 | 2 || || MBA-O || 17.2 || 2.0 km || multiple || 1998–2004 || 18 Jul 2004 || 102 || align=left | Disc.: Kleť Obs. || |- id="1998 HT31" bgcolor=#FFC2E0 | 2 || || APO || 20.8 || data-sort-value="0.25" | 250 m || single || 19 days || 09 May 1998 || 133 || align=left | Disc.: NEAT/GEODSSPotentially hazardous object || |- id="1998 HD43" bgcolor=#fefefe | 1 || || MBA-I || 19.37 || data-sort-value="0.45" | 450 m || multiple || 1998–2025 || 26 Mar 2025 || 53 || align=left | Disc.: SpacewatchAdded on 24 December 2021 || |- id="1998 HP126" bgcolor=#FFC2E0 | 9 || || ATE || 25.77 || data-sort-value="0.025" | 25 m || single || 1 day || 25 Apr 1998 || 15 || align=left | Disc.: LINEARAdded on 21 August 2021 || |- id="1998 HL151" bgcolor=#C2E0FF | 3 || || TNO || 8.1 || 100 km || multiple || 1998–2013 || 08 May 2013 || 25 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO, BR-mag: 1.06 || |- id="1998 HN151" bgcolor=#C2E0FF | 2 || || TNO || 8.3 || 91 km || multiple || 1998–2017 || 01 Apr 2017 || 31 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO || |- id="1998 HO151" bgcolor=#C2E0FF | 3 || || TNO || 8.2 || 95 km || multiple || 1998–2017 || 30 Mar 2017 || 19 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO || |- id="1998 HR151" bgcolor=#C2E0FF | E || || TNO || 8.6 || 65 km || single || 63 days || 30 Jun 1998 || 11 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? ||

K

|- id="1998 KH" bgcolor=#FFC2E0 | 4 || 1998 KH || APO || 19.2 || data-sort-value="0.51" | 510 m || multiple || 1998–2015 || 01 Jun 2015 || 133 || align=left | Disc.: LINEAR || |- id="1998 KD3" bgcolor=#FFC2E0 | 4 || || APO || 20.6 || data-sort-value="0.27" | 270 m || single || 28 days || 21 Jun 1998 || 172 || align=left | Disc.: LINEARAMO at MPC || |- id="1998 KF3" bgcolor=#FFC2E0 | 0 || || AMO || 19.09 || data-sort-value="0.59" | 520 m || multiple || 1998–2026 || 14 Jun 2026 || 104 || align=left | Disc.: LINEAR || |- id="1998 KO3" bgcolor=#FFC2E0 | 8 || || APO || 19.5 || data-sort-value="0.45" | 450 m || single || 6 days || 30 May 1998 || 60 || align=left | Disc.: LINEAR || |- id="1998 KF6" bgcolor=#FA8072 | 0 || || MCA || 20.44 || data-sort-value="0.26" | 260 m || multiple || 1998–2025 || 31 Mar 2025 || 93 || align=left | Disc.: LINEARAlt.: 2013 JT6 || |- id="1998 KJ17" bgcolor=#FFC2E0 | 6 || || AMO || 23.5 || data-sort-value="0.071" | 71 m || single || 8 days || 05 Jun 1998 || 59 || align=left | Disc.: LINEAR || |- id="1998 KY26" bgcolor=#FFC2E0 | 0 || || APO || 25.73 || data-sort-value="0.027" | 25 m || multiple || 1998–2024 || 01 May 2024 || 236 || align=left | Disc.: Spacewatch || |- id="1998 KY61" bgcolor=#C2E0FF | 2 || || TNO || 7.3 || 115 km || multiple || 1998–2017 || 22 Aug 2017 || 58 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano (cold) || |- id="1998 KS65" bgcolor=#C2E0FF | 4 || || TNO || 7.65 || 98 km || multiple || 1998–2021 || 12 Sep 2021 || 57 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano (cold), BR-mag: 1.73; taxonomy: RR-IR || |- id="1998 KD66" bgcolor=#C2E0FF | E || || TNO || 8.9 || 57 km || single || 10 days || 30 May 1998 || 3 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano? || |- id="1998 KE66" bgcolor=#C2E0FF | E || || TNO || 9.0 || 54 km || single || 10 days || 30 May 1998 || 3 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano? || |- id="1998 KF66" bgcolor=#C2E0FF | E || || TNO || 9.8 || 52 km || single || 10 days || 30 May 1998 || 3 || align=left | Disc.: Cerro TololoLoUTNOs, plutino? || |- id="1998 KG66" bgcolor=#C2E0FF | E || || TNO || 8.9 || 57 km || single || 10 days || 30 May 1998 || 3 || align=left | Disc.: Cerro TololoLoUTNOs, cubewano? ||

L

|- id="1998 LE" bgcolor=#FFC2E0 | 0 || 1998 LE || APO || 20.36 || data-sort-value="0.30" | 300 m || multiple || 1998–2024 || 19 May 2024 || 111 || align=left | Disc.: LINEAR ||

M

|- id="1998 MS2" bgcolor=#FFC2E0 | 0 || || AMO || 20.4 || data-sort-value="0.30" | 300 m || multiple || 1998–2023 || 12 Jan 2023 || 145 || align=left | Disc.: CSS || |- id="1998 MV5" bgcolor=#FFC2E0 | 7 || || APO || 24.0 || data-sort-value="0.056" | 56 m || single || 9 days || 02 Jul 1998 || 27 || align=left | Disc.: LINEAR ||

O

|- id="1998 OP4" bgcolor=#FFC2E0 | 7 || || AMO || 24.0 || data-sort-value="0.056" | 56 m || single || 4 days || 31 Jul 1998 || 21 || align=left | Disc.: Spacewatch ||

Q

|- id="1998 QQ" bgcolor=#FFC2E0 | 3 || 1998 QQ || APO || 18.7 || data-sort-value="0.65" | 650 m || multiple || 1998–2019 || 18 Oct 2019 || 172 || align=left | Disc.: LINEARAlt.: 2015 TV350 || |- id="1998 QF1" bgcolor=#FA8072 | 0 || || MCA || 18.82 || data-sort-value="0.51" | 510 m || multiple || 1998–2022 || 06 Jan 2022 || 111 || align=left | Disc.: LINEAR || |- id="1998 QH1" bgcolor=#FFC2E0 | 1 || || AMO || 20.7 || data-sort-value="0.26" | 260 m || multiple || 1998–2002 || 14 Sep 2002 || 47 || align=left | Disc.: LINEAR || |- id="1998 QJ1" bgcolor=#C7FF8F | 4 || || CEN || 16.64 || 2.9 km || single || 62 days || 18 Oct 1998 || 158 || align=left | Disc.: LINEAR || |- id="1998 QV3" bgcolor=#FFC2E0 | 5 || || AMO || 20.5 || data-sort-value="0.28" | 280 m || single || 58 days || 13 Oct 1998 || 63 || align=left | Disc.: LINEAR || |- id="1998 QV27" bgcolor=#FA8072 | 0 || || MCA || 19.02 || data-sort-value="0.52" | 500 m || multiple || 1998–2023 || 16 Apr 2023 || 59 || align=left | Disc.: Spacewatch || |- id="1998 QF28" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.64 || 1.7 km || multiple || 1998–2021 || 29 Aug 2021 || 69 || align=left | Disc.: SpacewatchAlt.: 2012 RC7 || |- id="1998 QH28" bgcolor=#FFC2E0 | 8 || || AMO || 22.9 || data-sort-value="0.093" | 93 m || single || 7 days || 30 Aug 1998 || 15 || align=left | Disc.: Spacewatch || |- id="1998 QP52" bgcolor=#FA8072 | 0 || || MCA || 18.08 || 1.3 km || multiple || 1998–2022 || 09 Jan 2022 || 103 || align=left | Disc.: LINEAR || |- id="1998 QJ56" bgcolor=#FA8072 | 0 || || MCA || 18.0 || 1.1 km || multiple || 1998–2024 || 30 Jun 2024 || 122 || align=left | Disc.: LINEAR || |- id="1998 QX56" bgcolor=#fefefe | 3 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 1998–2019 || 03 Oct 2019 || 42 || align=left | Disc.: Spacewatch || |- id="1998 QO59" bgcolor=#fefefe | 1 || || MBA-I || 19.51 || data-sort-value="0.39" | 390 m || multiple || 1998–2025 || 13 Oct 2025 || 25 || align=left | Disc.: Spacewatch || |- id="1998 QA62" bgcolor=#FFC2E0 | 0 || || APO || 19.29 || data-sort-value="0.56" | 500 m || multiple || 1998-2025 || 03 Apr 2025 || 167 || align=left | Disc.: LINEARPotentially hazardous object || |- id="1998 QQ85" bgcolor=#FA8072 | 1 || || MCA || 18.05 || 1.4 km || multiple || 1998–2021 || 29 Nov 2021 || 69 || align=left | Disc.: LINEARAlt.: 2007 PN4 || |- id="1998 QX104" bgcolor=#FA8072