List of unnumbered minor planets: 2004 A–B

This is a partial list of unnumbered minor planets for principal provisional designations assigned during 1–31 January 2004. As of November 2025^[update], a total of 118 bodies remain unnumbered for this period.^[1][2] Objects for this year are listed on the following pages: A–B · C · D–E · F · G–H · J–O · P–Q · R_i · R_ii · R_iii · S · T_i · T_ii · T_iii · T_iv · U–V · W–X and Y. Also see previous and next year.

Near-Earth obj.	MBA (inner)	MBA (outer)	Centaur
Mars-crosser	MBA (middle)	Jupiter trojan	Trans-Neptunian obj.
Unclassified

A

U	Designation	Class	Physical		Observations				Description and notes	Ref
			H	D	Opp.	Arc	Last	Used
2	2004 AC	APO	18.9	590 m	multiple	2004–2020	20 Dec 2020	147	Disc.: LINEAR	MPC · JPL
5	2004 AD	APO	24.4	47 m	single	26 days	30 Jan 2004	86	Disc.: LONEOS	MPC · JPL
7	2004 AM	AMO	19.3	490 m	single	16 days	28 Jan 2004	24	Disc.: NEAT	MPC · JPL
1	2004 AD1	APO	22.5	110 m	multiple	2004–2019	30 Aug 2019	74	Disc.: LONEOS	MPC · JPL
2	2004 AY1	APO	21.2	200 m	multiple	2004–2017	24 Feb 2017	61	Disc.: LINEAR	MPC · JPL
7	2004 AE6	APO	24.4	47 m	single	17 days	01 Feb 2004	26	Disc.: Spacewatch	MPC · JPL
2	2004 AL6	MBA-M	18.2	680 m	multiple	2004–2019	24 Oct 2019	31	Disc.: Spacewatch	MPC · JPL
3	2004 AE9	Asteroid	17.5	1.8 km	single	89 days	16 Mar 2004	81	Disc.: LONEOS MBA at MPC	MPC · JPL
0	2004 AC16	MBA-O	16.3	3.1 km	multiple	2004–2021	17 Jan 2021	38	Disc.: Spacewatch Added on 11 May 2021 Alt.: 2010 JW12	MPC · JPL
0	2004 AP18	MBA-O	16.8	2.4 km	multiple	2004–2021	18 Jan 2021	45	Disc.: Spacewatch	MPC · JPL
2	2004 AF19	MBA-I	18.6	570 m	multiple	2004–2019	10 Jan 2019	28	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
0	2004 AH19	MBA-I	18.95	480 m	multiple	2003–2021	09 Nov 2021	43	Disc.: Spacewatch	MPC · JPL
0	2004 AZ19	MBA-M	18.3	920 m	multiple	2004–2020	14 Nov 2020	28	Disc.: Spacewatch Added on 9 March 2021	MPC · JPL
0	2004 AF21	MBA-I	19.36	400 m	multiple	2004–2021	14 Nov 2021	38	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
0	2004 AM24	MBA-I	18.6	570 m	multiple	2004–2020	17 Dec 2020	36	Disc.: Spacewatch	MPC · JPL
0	2004 AG27	MBA-I	18.96	480 m	multiple	2004–2021	07 Nov 2021	54	Disc.: Spacewatch	MPC · JPL
0	2004 AM27	MBA-I	18.7	540 m	multiple	2004–2019	01 Nov 2019	37	Disc.: Spacewatch	MPC · JPL
0	2004 AQ27	MBA-I	18.7	540 m	multiple	2004–2020	23 Jun 2020	50	Disc.: Spacewatch	MPC · JPL

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B

U	Designation	Class	Physical		Observations				Description and notes	Ref
			H	D	Opp.	Arc	Last	Used
0	2004 BB1	MBA-O	17.9	1.5 km	multiple	2004–2020	02 Feb 2020	41	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
8	2004 BY1	ATE	24.5	45 m	single	28 days	14 Feb 2004	37	Disc.: AMOS	MPC · JPL
0	2004 BZ6	MBA-O	17.2	2.0 km	multiple	2004–2019	28 Dec 2019	41	Disc.: Spacewatch Added on 22 July 2020 Alt.: 2015 BX209	MPC · JPL
0	2004 BF7	MBA-M	17.7	1.2 km	multiple	2004–2021	07 Feb 2021	31	Disc.: Spacewatch Added on 9 March 2021	MPC · JPL
–	2004 BK7	MBA-M	19.6	360 m	single	2 days	18 Jan 2004	9	Disc.: Spacewatch	MPC · JPL
–	2004 BD11	MCA	21.2	170 m	single	2 days	19 Jan 2004	18	Disc.: Spacewatch	MPC · JPL
6	2004 BF11	AMO	24.0	56 m	single	35 days	22 Feb 2004	37	Disc.: Spacewatch	MPC · JPL
2	2004 BH11	APO	23.95	60 m	multiple	2004-2024	15 Feb 2024	28	Disc.: Spacewatch	MPC · JPL
5	2004 BJ11	AMO	21.7	160 m	multiple	2004–2011	02 Feb 2011	21	Disc.: Spacewatch	MPC · JPL
5	2004 BK11	AMO	22.4	120 m	single	29 days	16 Feb 2004	31	Disc.: Spacewatch	MPC · JPL
1	2004 BM11	APO	21.99	150 m	multiple	2004–2016	30 Aug 2016	45	Disc.: NEAT Alt.: 2016 QP11	MPC · JPL
0	2004 BR18	MBA-I	18.94	480 m	multiple	2004–2021	27 Nov 2021	63	Disc.: Spacewatch Added on 5 November 2021	MPC · JPL
5	2004 BV18	APO	25.9	23 m	single	30 days	18 Feb 2004	96	Disc.: Spacewatch	MPC · JPL
4	2004 BW18	AMO	22.5	110 m	single	105 days	13 Apr 2004	93	Disc.: LINEAR	MPC · JPL
6	2004 BZ18	AMO	21.2	200 m	single	27 days	15 Feb 2004	30	Disc.: LINEAR	MPC · JPL
0	2004 BY21	AMO	18.8	620 m	multiple	2004–2019	15 Jan 2019	50	Disc.: LINEAR	MPC · JPL
0	2004 BD22	MCA	17.8	820 m	multiple	2004–2019	24 Aug 2019	70	Disc.: NEAT Alt.: 2015 OF47	MPC · JPL
3	2004 BG25	MBA-M	17.6	1.3 km	multiple	2004–2020	09 Dec 2020	56	Disc.: CSS	MPC · JPL
0	2004 BG41	APO	24.4	47 m	multiple	2004–2015	02 Nov 2015	84	Disc.: LINEAR Alt.: 2008 AA31	MPC · JPL
E	2004 BL41	MBA-M	19.1	640 m	single	3 days	26 Jan 2004	16	Disc.: Sierra Nevada Obs.	MPC · JPL
8	2004 BN41	APO	26.1	21 m	single	7 days	30 Jan 2004	23	Disc.: LINEAR	MPC · JPL
0	2004 BP53	MCA	18.9	700 m	multiple	2004–2021	10 Feb 2021	47	Disc.: LINEAR Added on 9 March 2021	MPC · JPL
1	2004 BL57	MBA-M	17.9	1.1 km	multiple	2003–2020	17 Nov 2020	38	Disc.: LINEAR Alt.: 2013 FC13	MPC · JPL
0	2004 BR58	MBA-M	18.0	1.1 km	multiple	2004–2021	11 Jan 2021	81	Disc.: Sandlot Obs. Alt.: 2017 BV132	MPC · JPL
0	2004 BT58	ATE	22.2	130 m	multiple	2004–2020	25 Jan 2020	132	Disc.: LINEAR	MPC · JPL
0	2004 BX58	AMO	19.57	450 m	multiple	2004-2022	04 Dec 2022	61	Disc.: LINEAR	MPC · JPL
1	2004 BZ62	MBA-M	16.8	1.3 km	multiple	2004–2020	18 Jan 2020	35	Disc.: LINEAR Alt.: 2008 CX89	MPC · JPL
0	2004 BH65	MBA-O	17.7	1.6 km	multiple	2003–2020	03 Feb 2020	30	Disc.: LINEAR Added on 22 July 2020	MPC · JPL
–	2004 BC69	MCA	19.6	360 m	single	26 days	14 Feb 2004	18	Disc.: Spacewatch	MPC · JPL
0	2004 BR69	HUN	18.7	540 m	multiple	2004–2021	16 Jan 2021	23	Disc.: Spacewatch Added on 11 May 2021	MPC · JPL
0	2004 BZ74	APO	18.1	962 m	multiple	2004–2020	05 Feb 2020	165	Disc.: LINEAR NEO larger than 1 kilometer	MPC · JPL
8	2004 BA75	APO	24.4	47 m	single	4 days	31 Jan 2004	14	Disc.: Spacewatch	MPC · JPL
7	2004 BB75	AMO	23.1	85 m	single	21 days	18 Feb 2004	41	Disc.: LINEAR	MPC · JPL
1	2004 BS75	MBA-M	17.4	980 m	multiple	2004–2020	31 Jan 2020	66	Disc.: LINEAR	MPC · JPL
2	2004 BN77	MBA-M	18.3	650 m	multiple	2004–2019	18 Nov 2019	44	Disc.: LINEAR	MPC · JPL
0	2004 BU77	MBA-M	17.7	1.2 km	multiple	2004–2020	19 Dec 2020	42	Disc.: LINEAR	MPC · JPL
5	2004 BF85	APO	20.2	320 m	single	34 days	09 Feb 2004	51	Disc.: LINEAR	MPC · JPL
–	2004 BV85	MBA-I	17.4	980 m	single	2 days	30 Jan 2004	11	Disc.: LINEAR	MPC · JPL
0	2004 BE86	AMO	21.09	200 m	multiple	2003–2023	08 Mar 2023	397	Disc.: LINEAR	MPC · JPL
8	2004 BK86	APO	25.4	30 m	single	1 day	31 Jan 2004	8	Disc.: LINEAR	MPC · JPL
0	2004 BL100	MBA-M	18.55	490 m	multiple	2004-2025	23 May 2025	33	Disc.: Spacewatch	MPC · JPL
1	2004 BC101	MBA-O	17.6	1.7 km	multiple	2004–2020	15 Mar 2020	40	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
0	2004 BN101	MBA-I	19.19	430 m	multiple	2004–2022	25 Jan 2022	38	Disc.: Spacewatch	MPC · JPL
–	2004 BT122	MBA-M	19.2	800 m	single	9 days	30 Jan 2004	13	Disc.: Mauna Kea Obs.	MPC · JPL
–	2004 BU122	HIL	18.6	1.1 km	single	9 days	30 Jan 2004	13	Disc.: Mauna Kea Obs.	MPC · JPL
0	2004 BJ123	MBA-I	19.53	370 m	multiple	2004–2022	25 Jan 2022	106	Disc.: Mauna Kea Obs. Added on 17 June 2021 Alt.: 2020 RL111	MPC · JPL
0	2004 BN123	MBA-M	18.3	920 m	multiple	2004–2018	14 Sep 2018	44	Disc.: Mauna Kea Obs.	MPC · JPL
0	2004 BR123	MBA-M	18.7	540 m	multiple	2004–2021	08 May 2021	27	Disc.: Mauna Kea Obs. Added on 21 August 2021 Alt.: 2017 HG79	MPC · JPL
2	2004 BZ124	MBA-I	19.8	330 m	multiple	2004–2015	15 Mar 2015	28	Disc.: Spacewatch Alt.: 2015 BK507	MPC · JPL
0	2004 BD126	MBA-I	19.13	440 m	multiple	2004–2021	30 Oct 2021	64	Disc.: Spacewatch Added on 30 September 2021	MPC · JPL
0	2004 BQ127	MBA-M	18.08	1.3 km	multiple	2004–2021	28 Nov 2021	74	Disc.: Spacewatch Added on 5 November 2021	MPC · JPL
1	2004 BA131	MBA-O	18.3	1.2 km	multiple	2004–2020	02 Feb 2020	24	Disc.: Spacewatch Added on 17 January 2021	MPC · JPL
1	2004 BZ133	MBA-O	17.8	1.5 km	multiple	2004–2021	17 Feb 2021	23	Disc.: Spacewatch Added on 17 June 2021	MPC · JPL
0	2004 BQ135	MBA-O	17.1	2.1 km	multiple	2004–2020	22 Mar 2020	43	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
3	2004 BB136	MBA-O	17.6	1.7 km	multiple	2004–2020	14 Feb 2020	43	Disc.: Spacewatch Added on 22 July 2020 Alt.: 2015 EJ52	MPC · JPL
0	2004 BQ138	MBA-O	17.68	1.6 km	multiple	2004–2021	03 Apr 2021	25	Disc.: Spacewatch	MPC · JPL
0	2004 BX141	MBA-M	18.2	960 m	multiple	2004–2021	15 Jan 2021	42	Disc.: Spacewatch	MPC · JPL
0	2004 BT142	MBA-O	17.55	1.7 km	multiple	2004–2021	17 Apr 2021	39	Disc.: Spacewatch Alt.: 2015 EB72	MPC · JPL
0	2004 BB143	MBA-I	19.24	420 m	multiple	2004–2021	30 Nov 2021	49	Disc.: Spacewatch Alt.: 2015 AG141	MPC · JPL
0	2004 BN143	MBA-I	18.65	550 m	multiple	2004–2021	01 Nov 2021	48	Disc.: Spacewatch Alt.: 2019 AQ56	MPC · JPL
0	2004 BA148	MBA-M	18.2	960 m	multiple	2004–2020	16 Aug 2020	43	Disc.: NEAT	MPC · JPL
0	2004 BP148	MBA-M	18.39	880 m	multiple	2004–2020	17 Dec 2020	57	Disc.: Spacewatch Added on 17 January 2021 Alt.: 2007 VE254	MPC · JPL
0	2004 BQ153	MBA-I	18.93	490 m	multiple	2004–2022	27 Jan 2022	49	Disc.: Spacewatch Alt.: 2015 BK435	MPC · JPL
4	2004 BR156	MBA-O	17.9	1.5 km	multiple	2004–2021	15 Mar 2021	23	Disc.: Spacewatch Added on 17 June 2021 Alt.: 2015 BE172	MPC · JPL
2	2004 BG159	MBA-M	18.9	490 m	multiple	2004–2021	09 May 2021	107	Disc.: Cerro Paranal Added on 17 June 2021 Alt.: 2021 GC100	MPC · JPL
E	2004 BK159	MBA-M	18.4	1.2 km	single	2 days	22 Jan 2004	6	Disc.: Paranal Obs.	MPC · JPL
0	2004 BN159	MBA-I	18.5	590 m	multiple	2004–2020	21 Oct 2020	41	Disc.: Paranal Obs.	MPC · JPL
–	2004 BR159	MBA-O	17.3	1.9 km	single	3 days	23 Jan 2004	8	Disc.: Paranal Obs.	MPC · JPL
–	2004 BV159	MBA-M	18.5	840 m	single	2 days	22 Jan 2004	9	Disc.: Paranal Obs.	MPC · JPL
0	2004 BB160	MBA-O	17.7	1.6 km	multiple	2004–2017	21 Sep 2017	36	Disc.: Paranal Obs. Added on 11 May 2021 Alt.: 2006 SL104	MPC · JPL
0	2004 BD160	MBA-O	17.36	1.9 km	multiple	2004–2021	29 Apr 2021	67	Disc.: Paranal Obs. Alt.: 2010 PZ29, 2015 FK46	MPC · JPL
0	2004 BG160	MBA-M	17.8	1.5 km	multiple	2004–2021	06 Jan 2021	95	Disc.: Paranal Obs.	MPC · JPL
0	2004 BL160	MBA-O	17.94	1.4 km	multiple	2004–2021	11 Nov 2021	64	Disc.: Paranal Obs.	MPC · JPL
0	2004 BR160	MBA-I	19.37	400 m	multiple	2004–2022	07 Jan 2022	32	Disc.: Paranal Obs.	MPC · JPL
0	2004 BO162	MBA-O	17.6	1.7 km	multiple	2004–2018	30 Dec 2018	40	Disc.: Mauna Kea Obs. Added on 21 August 2021 Alt.: 2007 TY47	MPC · JPL
0	2004 BA164	MBA-O	18.25	1.2 km	multiple	2004–2021	07 Nov 2021	38	Disc.: Mauna Kea Obs. Added on 9 March 2021 Alt.: 2006 SC383	MPC · JPL
0	2004 BU167	MBA-I	18.7	540 m	multiple	2004–2018	15 Apr 2018	38	Disc.: Spacewatch	MPC · JPL
1	2004 BY167	MBA-I	18.7	540 m	multiple	2004–2018	16 May 2018	31	Disc.: LPL/Spacewatch II	MPC · JPL
0	2004 BK168	MBA-I	19.30	410 m	multiple	2004–2022	27 Jan 2022	38	Disc.: Spacewatch	MPC · JPL
0	2004 BM168	MBA-M	18.4	620 m	multiple	2004–2019	17 Dec 2019	62	Disc.: Spacewatch	MPC · JPL
0	2004 BO168	MBA-M	17.9	1.1 km	multiple	2004–2020	20 Dec 2020	34	Disc.: Spacewatch	MPC · JPL
0	2004 BR168	MBA-M	18.1	1.0 km	multiple	2004–2021	09 Jan 2021	21	Disc.: Spacewatch	MPC · JPL
0	2004 BS168	MBA-O	17.70	1.6 km	multiple	2004–2021	08 Apr 2021	36	Disc.: Spacewatch	MPC · JPL
0	2004 BD170	MBA-O	17.0	2.2 km	multiple	2004–2021	18 Jan 2021	56	Disc.: Spacewatch	MPC · JPL
0	2004 BS170	MBA-I	18.19	680 m	multiple	2004–2021	09 Jul 2021	47	Disc.: Spacewatch	MPC · JPL
0	2004 BT170	MBA-O	17.8	1.5 km	multiple	2004–2019	26 Feb 2019	38	Disc.: Spacewatch	MPC · JPL
0	2004 BU170	MBA-I	18.98	480 m	multiple	2004–2021	07 Oct 2021	59	Disc.: Spacewatch	MPC · JPL
0	2004 BY171	MBA-M	17.3	1.5 km	multiple	2004–2021	12 Jan 2021	59	Disc.: Spacewatch	MPC · JPL
1	2004 BG172	MBA-M	18.8	520 m	multiple	2004–2020	02 Feb 2020	50	Disc.: Spacewatch	MPC · JPL
0	2004 BK172	MBA-O	17.1	2.1 km	multiple	2004–2019	29 Nov 2019	28	Disc.: Spacewatch	MPC · JPL
0	2004 BM172	MBA-O	17.5	1.8 km	multiple	2004–2020	22 Mar 2020	24	Disc.: SDSS	MPC · JPL
0	2004 BE173	MBA-M	18.3	920 m	multiple	2004–2021	17 Jan 2021	41	Disc.: Spacewatch	MPC · JPL
1	2004 BH173	MBA-O	18.0	1.4 km	multiple	2004–2020	16 Mar 2020	35	Disc.: Spacewatch Added on 22 July 2020	MPC · JPL
1	2004 BL173	MBA-M	18.1	1.0 km	multiple	2004–2020	20 Oct 2020	42	Disc.: Spacewatch Added on 17 January 2021	MPC · JPL
0	2004 BO173	MBA-M	18.2	960 m	multiple	2004–2020	17 Nov 2020	50	Disc.: Spacewatch Added on 17 January 2021	MPC · JPL
0	2004 BS173	MBA-I	19.1	450 m	multiple	2004–2021	19 Mar 2021	34	Disc.: Spacewatch Added on 11 May 2021	MPC · JPL
0	2004 BT173	MBA-I	19.36	400 m	multiple	2004–2019	05 Nov 2019	26	Disc.: Spacewatch Added on 17 June 2021	MPC · JPL
0	2004 BV173	MBA-I	19.0	470 m	multiple	2004–2021	10 Feb 2021	24	Disc.: Spacewatch Added on 5 November 2021	MPC · JPL
0	2004 BW173	MBA-O	17.4	1.8 km	multiple	2004–2021	10 Apr 2021	24	Disc.: SDSS Added on 5 November 2021 Alt.: 2010 MT134	MPC · JPL
0	2004 BX173	MBA-M	18.37	1.2 km	multiple	2004–2021	08 Dec 2021	40	Disc.: Spacewatch Added on 24 December 2021	MPC · JPL

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References

1. "Data Available from the Minor Planet Center – MPCORB.DAT". Minor Planet Center. 29 January 2022. (doc)
2. "NEOWISE Diameters and Albedos – V2.0". PDS Small Bodies Node. 2019. Retrieved 1 February 2022.