List of unnumbered minor planets: 1997

This is a partial list of unnumbered minor planets for principal provisional designations assigned between 1 January and 31 December 1997. As of June 2024^[update], a total of 123 bodies remain unnumbered for this period.^[1]^[2]^[3] 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
U	Designation	Class	H	D	Opp.	Arc	Last	Used	Description and notes	Ref

0	1997 AC11	ATE	20.67	280 m	multiple	1997–2024	18 Dec 2024	173	Disc.: NEAT/GEODSS	MPC · JPL
0	1997 AF12	MBA-M	17.18	1.5 km	multiple	1997–2022	25 Jan 2022	184	Disc.: Spacewatch Added on 22 July 2020 Alt.: 2015 MS33, 2017 YW15	MPC · JPL
0	1997 AB15	MCA	17.80	820 m	multiple	1997–2022	26 Jan 2022	155	Disc.: NEAT/GEODSS	MPC · JPL
0	1997 AD23	MBA-O	17.8	1.5 km	multiple	1997-2024	26 Jun 2024	36	Disc.: Mauna Kea Obs. Alt.: 2018 BZ50	MPC · JPL
E	1997 AT24	MBA-O	16.0	3.5 km	single	5 days	10 Jan 1997	6	Disc.: Cerro Tololo	MPC · JPL
E	1997 AU24	MBA-O	13.5	11 km	single	5 days	10 Jan 1997	6	Disc.: Cerro Tololo	MPC · JPL

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C

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

6	1997 CD17	APO	27.5	11 m	single	2 days	11 Feb 1997	21	Disc.: Spacewatch	MPC · JPL
E	1997 CW29	TNO	6.5	237 km	single	27 days	07 Mar 1997	11	Disc.: Mauna Kea Obs. LoUTNOs, plutino?	MPC · JPL

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E

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

0	1997 EF5	MBA-M	17.3	1.9 km	multiple	1997–2020	29 Apr 2020	75	Disc.: Spacewatch Alt.: 2010 EC59	MPC · JPL
1	1997 EF10	MBA-M	19.83	370 m	multiple	1997-2019	09 Apar 2019	36	Disc.: Spacewatch Alt.: 2010 GX48, 2019 GG150	MPC · JPL
1	1997 ER12	MBA-I	18.6	570 m	multiple	1997–2020	24 Jun 2020	43	Disc.: Spacewatch Added on 22 July 2020 Alt.: 2020 JO11	MPC · JPL
1	1997 EL15	MBA-M	18.54	880 m	multiple	1997–2023	17 Mar 2023	28	Disc.: Spacewatch	MPC · JPL
0	1997 EH17	MBA-O	17.0	2.2 km	multiple	1997–2020	21 May 2020	33	Disc.: Spacewatch	MPC · JPL
1	1997 EV22	MBA-M	18.19	1.1 km	multiple	1997–2024	28 Apr 2024	50	Disc.: Spacewatch	MPC · JPL
6	1997 EN23	AMO	22.8	98 m	single	21 days	29 Mar 1997	17	Disc.: Spacewatch	MPC · JPL
0	1997 EG60	MBA-M	17.36	1.4 km	multiple	1997–2022	25 Jan 2022	90	Disc.: Spacewatch Alt.: 2015 MV52	MPC · JPL

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G

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

1	1997 GB2	MBA-O	18.7	1.0 km	multiple	1997–2023	18 Mar 2023	99	Disc.: Spacewatch	MPC · JPL
0	1997 GF3	MBA-O	17.16	2.0 km	multiple	1997–2024	09 Jun 2024	139	Disc.: NEAT/GEODSS	MPC · JPL
2	1997 GK3	APO	22.8	98 m	multiple	1997–2014	02 May 2014	64	Disc.: Spacewatch AMO at MPC	MPC · JPL
0	1997 GU24	MBA-I	18.12	710 m	multiple	1997–2021	30 Jun 2021	122	Disc.: Spacewatch Alt.: 2005 UK453	MPC · JPL
0	1997 GQ25	MCA	18.36	630 m	multiple	1997–2021	30 Apr 2021	43	Disc.: Spacewatch Alt.: 2009 FQ29	MPC · JPL
0	1997 GL27	MBA-M	18.01	1.1 km	multiple	1997–2020	18 Sep 2020	80	Disc.: Spacewatch	MPC · JPL
0	1997 GX27	MCA	18.32	750 m	multiple	1997–2023	14 Oct 2023	83	Disc.: Whipple Obs.	MPC · JPL
6	1997 GD32	APO	21.5	180 m	single	22 days	06 May 1997	90	Disc.: Spacewatch Potentially hazardous object	MPC · JPL
2	1997 GA45	TNO	8.6	98 km	multiple	1997–2017	24 Jun 2017	38	Disc.: Mauna Kea Obs. LoUTNOs, cubewano (hot) Alt.: 2001 FH193	MPC · JPL

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H

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

1	1997 HB4	MBA-M	18.15	960 m	multiple	1997–2023	19 Jun 2023	35	Disc.: Spacewatch Alt.: 2010 HY81	MPC · JPL

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J

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

0	1997 JS3	MBA-O	17.42	1.8 km	multiple	1997–2021	28 Nov 2021	54	Disc.: Mauna Kea Obs. Alt.: 2010 RA100	MPC · JPL
0	1997 JP5	MBA-I	17.45	960 m	multiple	1997–2020	15 Dec 2020	117	Disc.: Spacewatch	MPC · JPL
0	1997 JP19	MBA-M	17.94	770 m	multiple	1997–2021	10 May 2021	77	Disc.: Spacewatch Added on 11 May 2021	MPC · JPL

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K

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

0	1997 KP	MBA-M	17.27	2.0 km	multiple	1997–2021	26 Nov 2021	103	Disc.: Whipple Obs.	MPC · JPL

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L

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

0	1997 LA1	MBA-I	18.58	620 m	multiple	1997–2022	22 Sep 2022	99	Disc.: Spacewatch	MPC · JPL

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M

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

1	1997 MS	APO	19.41	480 m	multiple	1997-2024	10 May 2024	55	Disc.: LINEAR	MPC · JPL
1	1997 MD10	CEN	16.0	4.0 km	single	137 days	13 Nov 1997	115	Disc.: LINEAR MCA at MPC	MPC · JPL
0	1997 MM12	MBA-O	17.4	1.8 km	multiple	1997–2019	20 Dec 2019	50	Disc.: DB Missing Added on 22 July 2020	MPC · JPL

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N

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

2	1997 NN4	MCA	21.41	160 m	multiple	1997–2016	30 Aug 2016	37	Disc.: Spacewatch	MPC · JPL
0	1997 NR5	MBA-I	19.0	470 m	multiple	1997–2020	27 Apr 2020	30	Disc.: Spacewatch	MPC · JPL
0	1997 NP9	MBA-I	19.61	360 m	multiple	1997–2021	13 Oct 2021	35	Disc.: Spacewatch Added on 5 November 2021 Alt.: 2014 OG7	MPC · JPL
0	1997 NP10	MCA	20.36	250 m	multiple	1997–2021	14 Nov 2021	98	Disc.: Spacewatch Alt.: 2021 RZ101	MPC · JPL
1	1997 NE12	MBA-I	18.93	490 m	multiple	1997–2018	17 Nov 2018	49	Disc.: Spacewatch Alt.: 2018 RM47	MPC · JPL

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O

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

–	1997 OH	MCA	19.0	470 m	single	4 days	30 Jul 1997	31	Disc.: ODAS	MPC · JPL
0	1997 OJ3	MBA-M	18.47	600 m	multiple	1997–2021	18 Jul 2021	44	Disc.: Spacewatch	MPC · JPL

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P

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

2	1997 PN	AMO	19.7	410 m	multiple	1997–2007	16 Aug 2007	127	Disc.: NEAT/GEODSS	MPC · JPL

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Q

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

0	1997 QK1	APO	20.08	340 m	multiple	1997–2011	09 Oct 2011	180	Disc.: Mauna Kea Obs. Potentially hazardous object	MPC · JPL
2	1997 QH4	TNO	7.0	204 km	multiple	1997–2014	27 Sep 2014	30	Disc.: Mauna Kea Obs. LoUTNOs, cubewano (hot), BR-mag: 1.68; taxonomy: RR	MPC · JPL

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R

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

0	1997 RT	AMO	19.96	390 m	multiple	1997–2024	30 Sep 2024	312	Disc.: Ondřejov Obs.	MPC · JPL
E	1997 RY6	TNO	7.5	162 km	single	52 days	29 Oct 1997	20	Disc.: La Palma Obs. LoUTNOs, cubewano (hot)	MPC · JPL
0	1997 RN7	MCA	17.7	1.2 km	multiple	1997–2020	23 Mar 2020	107	Disc.: NRC Alt.: 1997 RL10, 2014 QQ419	MPC · JPL
5	1997 RX9	TNO	8.3	91 km	multiple	1997–2000	08 Aug 2000	22	Disc.: Palomar Obs. LoUTNOs, other TNO	MPC · JPL
0	1997 RC12	MBA-M	18.3	920 m	multiple	1997–2019	02 Oct 2019	43	Disc.: ODAS Added on 22 July 2020	MPC · JPL
E	1997 RL13	TNO	9.5	43 km	single	1 day	06 Sep 1997	4	Disc.: Palomar Obs. LoUTNOs, cubewano?	MPC · JPL

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S

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

0	1997 SU3	MBA-I	18.7	540 m	multiple	1997–2020	02 Feb 2020	41	Disc.: Spacewatch	MPC · JPL
0	1997 SX5	MBA-I	18.65	550 m	multiple	1997–2021	08 Nov 2021	97	Disc.: Spacewatch Alt.: 2014 RE20	MPC · JPL
0	1997 SK7	MBA-O	17.1	2.2 km	multiple	1997–2021	07 Jan 2021	108	Disc.: Spacewatch Alt.: 2010 ED152	MPC · JPL
0	1997 ST7	MBA-O	17.3	1.9 km	multiple	1997–2020	15 Oct 2020	49	Disc.: Spacewatch Added on 17 January 2021	MPC · JPL
0	1997 SY8	MBA-I	18.8	520 m	multiple	1997–2020	27 Jan 2020	30	Disc.: Spacewatch	MPC · JPL
0	1997 ST11	MBA-I	18.5	590 m	multiple	1997–2020	11 Dec 2020	32	Disc.: Spacewatch Added on 22 July 2020 Alt.: 2013 NM47	MPC · JPL
–	1997 SY11	MBA-M	19.3	410 m	single	7 days	04 Oct 1997	8	Disc.: Spacewatch	MPC · JPL
0	1997 SA12	HIL	15.81	3.8 km	multiple	1997–2021	09 Dec 2021	103	Disc.: Spacewatch Alt.: 1997 TD30, 2012 QP67	MPC · JPL
1	1997 SB12	MBA-I	19.82	320 m	multiple	1997–2021	30 Nov 2021	41	Disc.: Spacewatch Alt.: 2014 UG164	MPC · JPL
0	1997 SW14	MBA-I	18.93	520 m	multiple	1997–2022	19 Nov 2022	93	Disc.: Spacewatch Alt.: 2015 WZ5	MPC · JPL
0	1997 SX16	MBA-M	19.2	430 m	multiple	1997–2022	14 Sep 2022	55	Disc.: Spacewatch Alt.: 2018 VR92	MPC · JPL
0	1997 SB17	MBA-M	17.81	810 m	multiple	1997–2021	11 Sep 2021	52	Disc.: Mauna Kea Obs.	MPC · JPL
–	1997 SS19	MBA-M	18.8	520 m	single	12 days	10 Oct 1997	9	Disc.: Spacewatch	MPC · JPL
0	1997 ST19	MBA-I	18.47	600 m	multiple	1993–2020	05 Nov 2020	83	Disc.: Spacewatch Alt.: 1993 QF11	MPC · JPL
0	1997 SE20	MBA-I	17.88	790 m	multiple	1997–2021	02 Dec 2021	204	Disc.: Spacewatch Alt.: 2007 RW6	MPC · JPL
0	1997 SK20	MBA-O	18.39	1 km	multiple	1997–2024	29 Nov 2024	35	Disc.: Spacewatch Added on 11 May 2021 Alt.: 2013 TB128	MPC · JPL
0	1997 SR22	MBA-O	17.2	2.0 km	multiple	1997–2022	29 Apr 2022	46	Disc.: Spacewatch Added on 17 June 2021 Alt.: 2008 WU158	MPC · JPL
0	1997 SD23	MBA-I	18.4	620 m	multiple	1997–2020	07 Dec 2020	96	Disc.: Spacewatch Alt.: 2016 SP45	MPC · JPL
2	1997 SC26	MBA-M	18.93	700 m	multiple	1997-2022	02 Oct 2022	35	Disc.: Spacewatch	MPC · JPL
0	1997 SF26	MBA-O	16.77	2.5 km	multiple	1997–2021	10 Oct 2021	116	Disc.: Spacewatch Alt.: 2013 RC1	MPC · JPL
0	1997 SB28	MBA-M	18.0	1.1 km	multiple	1997–2019	27 Nov 2019	83	Disc.: Spacewatch Alt.: 2015 XF307	MPC · JPL
0	1997 SX28	MBA-M	17.9	1.1 km	multiple	1997–2021	12 Feb 2021	69	Disc.: Spacewatch Alt.: 2019 NW22	MPC · JPL
0	1997 SN29	MBA-I	19.1	460 m	multiple	1997–2022	01 Aug 2022	52	Disc.: Spacewatch Alt.: 2015 OW28	MPC · JPL
0	1997 SC32	MBA-M	17.72	850 m	multiple	1997–2021	02 May 2021	114	Disc.: Bergisch Gladbach Alt.: 2018 RD34	MPC · JPL
1	1997 SV32	MBA-I	19.23	420 m	multiple	1997–2021	08 Dec 2021	44	Disc.: Spacewatch Alt.: 2014 TN38	MPC · JPL

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T

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

E	1997 TN	MBA-O	—	—	single	2 days	04 Oct 1997	18	Disc.: Mauna Kea Obs.	MPC · JPL
5	1997 TQ	MBA-O	18.57	970 m	multiple	1997-2017	26 Jan 2017	41	Disc.: Mauna Kea Obs. Added on 21 August 2021	MPC · JPL
0	1997 TD3	MBA-M	17.24	2.0 km	multiple	1997–2022	25 Jan 2022	72	Disc.: ODAS Alt.: 2011 VJ9	MPC · JPL
0	1997 TC8	MBA-O	17.0	2.2 km	multiple	1997–2020	25 Jan 2020	37	Disc.: Spacewatch	MPC · JPL
0	1997 TL8	MBA-I	18.75	530 m	multiple	1997–2021	09 Oct 2021	64	Disc.: Spacewatch Alt.: 2014 RW32	MPC · JPL
E	1997 TX8	TNO	8.5	94 km	single	24 days	29 Oct 1997	12	Disc.: Palomar Obs. LoUTNOs, plutino?	MPC · JPL
0	1997 TU12	MBA-M	18.28	680 m	multiple	1997–2022	24 Dec 2022	62	Disc.: Spacewatch	MPC · JPL
0	1997 TO15	MCA	18.7	540 m	multiple	1997–2019	07 Apr 2019	55	Disc.: Spacewatch Alt.: 2010 TN181	MPC · JPL
7	1997 TZ16	APO	24.5	45 m	single	3 days	12 Oct 1997	27	Disc.: Spacewatch	MPC · JPL
7	1997 TC25	APO	24.6	43 m	single	23 days	23 Oct 1997	17	Disc.: Spacewatch	MPC · JPL
1	1997 TT25	AMO	19.3	490 m	multiple	1997–2020	05 Mar 2020	168	Disc.: Xinglong Stn.	MPC · JPL
0	1997 TS30	MBA-I	19.0	490 m	multiple	1997–2022	29 Aug 2022	36	Disc.: Spacewatch	MPC · JPL

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U

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

6	1997 UR	APO	23.2	81 m	single	21 days	12 Nov 1997	143	Disc.: LINEAR AMO at MPC	MPC · JPL
0	1997 UE7	MBA-O	16.8	2.4 km	multiple	1997–2021	08 Sep 2021	58	Disc.: Mauna Kea Obs. Added on 29 January 2022	MPC · JPL
0	1997 UT9	MCA	19.61	370 m	multiple	1997–2023	04 Oct 2023	150	Disc.: NEAT/GEODSS Alt.: 2010 TT19	MPC · JPL
8	1997 UZ10	AMO	23.0	89 m	single	14 days	12 Nov 1997	36	Disc.: LINEAR	MPC · JPL
3	1997 UA11	APO	25.2	32 m	single	13 days	08 Nov 1997	29	Disc.: LINEAR	MPC · JPL
1	1997 UR14	MBA-O	16.95	2.3 km	multiple	1997–2023	18 Mar 2023	28	Disc.: Spacewatch Alt.: 2014 WP303	MPC · JPL
0	1997 UX18	MBA-I	18.02	740 m	multiple	1997–2022	26 Jan 2022	149	Disc.: Spacewatch	MPC · JPL
1	1997 UR19	MBA-M	18.5	840 m	multiple	1997–2018	04 Oct 2018	26	Disc.: Spacewatch	MPC · JPL
E	1997 UG25	TNO	8.5	68 km	single	1 day	27 Oct 1997	4	Disc.: La Palma Obs. LoUTNOs, cubewano?	MPC · JPL

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V

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

8	1997 VG	AMO	22.2	130 m	single	10 days	09 Nov 1997	74	Disc.: LINEAR	MPC · JPL
2	1997 VN4	AMO	23.3	78 m	multiple	1997–2016	08 Nov 2016	140	Disc.: LINEAR	MPC · JPL
8	1997 VG6	APO	19.6	430 m	single	15 days	23 Nov 1997	50	Disc.: LINEAR Potentially hazardous object	MPC · JPL
0	1997 VU9	MBA-O	17.75	1.6 km	multiple	1997–2021	24 Nov 2021	60	Disc.: Spacewatch Added on 24 December 2021	MPC · JPL

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W

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

0	1997 WT6	MBA-O	17.17	2.0 km	multiple	1997-2ß23	05 Nov 2023	53	Disc.: Spacewatch	MPC · JPL
0	1997 WE14	MBA-M	17.78	1.1 km	multiple	1997–2023	16 Dec 2023	51	Disc.: Spacewatch	MPC · JPL
0	1997 WX15	MBA-O	17.54	1.7 km	multiple	1997–2021	06 Nov 2021	48	Disc.: Spacewatch Added on 5 November 2021 Alt.: 2007 VS169	MPC · JPL
0	1997 WO19	MBA-M	17.80	1.2 km	multiple	1997–2021	09 Apr 2021	68	Disc.: Spacewatch Alt.: 2015 XO369	MPC · JPL
1	1997 WQ23	APO	20.8	250 m	multiple	1997–2020	18 Dec 2020	185	Disc.: LINEAR Potentially hazardous object	MPC · JPL
0	1997 WJ29	MBA-M	17.79	820 m	multiple	1997–2021	11 Jun 2021	62	Disc.: Spacewatch	MPC · JPL

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X

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

0	1997 XS2	AMO	19.63	450 m	multiple	1997–2023	20 Sep 2023	129	Disc.: LINEAR	MPC · JPL
0	1997 XE10	APO	24.53	44 m	multiple	1997–2021	02 Jan 2021	68	Disc.: LINEAR	MPC · JPL

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Y

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

0	1997 YM9	APO	24.36	48 m	multiple	1997–2021	09 Sep 2021	70	Disc.: NEAT/GEODSS Alt.: 2005 YM128	MPC · JPL
8	1997 YR10	AMO	20.1	340 m	single	6 days	03 Jan 1998	34	Disc.: NEAT/GEODSS	MPC · JPL
0	1997 YM15	MBA-O	16.03	3.5 km	multiple	1997–2021	07 Apr 2021	398	Disc.: Spacewatch Alt.: 2010 KR56	MPC · JPL

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References

^ "Data Available from the Minor Planet Center – MPCORB.DAT". Minor Planet Center. 29 January 2022. (doc)
^ "NEOWISE Diameters and Albedos – V2.0". PDS Small Bodies Node. 2019. Retrieved 31 January 2022.
^ Johnston, Wm. Robert (2 January 2022). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 31 January 2022.

[MPCORB-1] "Data Available from the Minor Planet Center – MPCORB.DAT". Minor Planet Center. 29 January 2022. (doc)

[PDS-NEOWISE-diameters-2] "NEOWISE Diameters and Albedos – V2.0". PDS Small Bodies Node. 2019. Retrieved 31 January 2022.

[johnstonsarchive-TNO-list-3] Johnston, Wm. Robert (2 January 2022). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 31 January 2022.

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