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. As of March 2026^[update], a total of 185 bodies remain unnumbered for this period.^[1]^[2]^[3]^[4] Also see previous and next year.

U	Designation	Class	Physical		Observations				Description and notes	Ref
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

6	1998 AK10	MCA	20.9	200 m	single	33 days	02 Feb 1998	26	Disc.: Spacewatch	MPC · JPL
0	1998 AA12	MBA-I	18.72	540 m	multiple	1998–2021	15 Apr 2021	42	Disc.: Spacewatch	MPC · JPL

U	Designation	Class	Physical		Observations				Description and notes	Ref
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

0	1998 BY7	APO	21.47	180 m	multiple	1998–2021	04 Aug 2021	156	Disc.: Spacewatch Potentially hazardous object	MPC · JPL
7	1998 BT13	APO	26.5	18 m	single	6 days	30 Jan 1998	15	Disc.: Spacewatch	MPC · JPL
2	1998 BZ13	MBA-I	19.39	410 m	multiple	1998–2023	27 Mar 2023	42	Disc.: Spacewatch Alt.: 2016 EF148	MPC · JPL
7	1998 BR26	APO	26.0	22 m	single	1 day	31 Jan 1998	19	Disc.: Spacewatch	MPC · JPL
7	1998 BC34	Asteroid	20.8	390 m	single	11 days	02 Feb 1998	15	Disc.: Spacewatch MCA at MPC	MPC · JPL

U	Designation	Class	Physical		Observations				Description and notes	Ref
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

0	1998 DO11	MBA-O	16.6	2.7 km	multiple	1998–2021	10 Jun 2021	203	Disc.: NEAT/GEODSS Alt.: 2014 YJ47	MPC · JPL
6	1998 DX11	APO	27.0	14 m	single	3 days	26 Feb 1998	13	Disc.: Spacewatch	MPC · JPL
8	1998 DV20	APO	20.3	310 m	single	10 days	06 Mar 1998	11	Disc.: Spacewatch	MPC · JPL
0	1998 DH22	MBA-I	19.9	310 m	multiple	1998–2021	17 Feb 2021	141	Disc.: Spacewatch Added on 17 June 2021 Alt.: 2011 BR143	MPC · JPL
0	1998 DM25	MBA-I	18.9	490 m	multiple	1998–2021	10 Apr 2021	35	— Added on 29 January 2022	MPC · JPL
0	1998 DF26	MBA-I	18.96	480 m	multiple	1998–2021	08 May 2021	43	Disc.: Spacewatch	MPC · JPL
7	1998 DK36	ATI	25.0	36 m	single	1 day	24 Feb 1998	4	Disc.: Mauna Kea Obs.	MPC · JPL
0	1998 DV38	MBA-M	17.9	1.5 km	multiple	1998–2017	01 Jul 2017	39	Disc.: Spacewatch	MPC · JPL

U	Designation	Class	Physical		Observations				Description and notes	Ref
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

3	1998 EE3	APO	27.2	13 m	single	3 days	04 Mar 1998	11	Disc.: Spacewatch	MPC · JPL
1	1998 EO3	MBA-I	18.7	540 m	multiple	1998–2020	15 May 2020	35	Disc.: Spacewatch Added on 19 October 2020	MPC · JPL
2	1998 EP4	APO	21.5	180 m	multiple	1996–1998	05 Apr 1998	71	Disc.: Spacewatch	MPC · JPL

U	Designation	Class	Physical		Observations				Description and notes	Ref
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

0	1998 FL5	APO	21.52	170 m	multiple	1998–2022	19 Oct 2022	114	Disc.: LINEAR	MPC · JPL
0	1998 FM9	AMO	19.70	410 m	multiple	1998–2022	22 Jan 2022	121	Disc.: LINEAR	MPC · JPL
1	1998 FS11	MCA	19.69	390 m	multiple	1998–2025	11 Dec 2025	87	Disc.: NEAT/GEODSS	MPC · JPL
6	1998 FG12	APO	21.0	220 m	single	39 days	02 May 1998	42	Disc.: LINEAR	MPC · JPL
4	1998 FS144	TNO	6.7	235 km	multiple	1998–2022	26 Apr 2022	22	Disc.: Cerro Tololo LoUTNOs, cubewano (hot), BR-mag: 1.53; taxonomy: IR	MPC · JPL

B