List of unnumbered trans-Neptunian objects

	TNOs: a vs. e (semi-log plot, 30–1000 AU):
	Resonant plutinos (39 AU) and twotinos (48 AU) Inner and outer classical objects (< 39 and > 49 AU) Other resonant objects besides plutinos and twotinos Classical Kuiper belt objects (cubewanos) Scattered disc objects (SDO) Other TNOs (dots) and centaurs (asterisk) Sednoids, prominent ETNOs
	Distribution of 3,590 listed TNO objects (with a > 30.1 AU, including candidates) by subclass from Johnston's Archive (hover)

This is a list of unnumbered trans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year of principal provisional designation. The data is sourced from the Minor Planet Center's (MPC) List of Trans Neptunian Objects, List Of Centaurs and Scattered-Disk Objects, and Database Search.^[2]^[3]^[4] These objects will eventually be numbered as secured discoveries with an official discoverer determined by the MPC. Until then, additional observations are needed to sufficiently decrease an object's orbital uncertainty. As of October 2025^[update], there are 4,512 unnumbered objects, defined here as minor planets with a semi-major axis larger than 30.1 AU (Neptune's average orbital distance from the Sun).

The list also contains information from "Johnston's Archive", such as an object's diameter, its dynamical class and binary status with the satellite's diameter, as well as its albedo, spectral taxonomy and B–R color index.^[1] Members of the extreme trans-Neptunian objects (ESDOs, EDDOs and sednoids) – with a semi-major axis greater than 150 AU and perihelion greater than 30 AU – are also identified.

Statistics

250

500

750

1,000

1,250

1,500

'92

'94

'96

'98

'00

'02

'04

'06

'08

'10

'12

'14

'16

'18

'20

'22

'24

TNOs by year of principle designation since 1992 (objects with a < 30.1 AU excluded). As of October 2025, there are 4,512 unnumbered TNOs and 1,030 numbered TNOs (Pluto from 1930 is not shown)^[2]^[3]^[4]

Numbered TNOs: 1,030 obj. (18.6%)
Unnumbered TNOs: 4,512 obj. (81.4%)

Split-up of numbered and unnumbered trans-Neptunian objects^[2]^[3]^[4]

List

1993

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1993 RP	15 September 1993	Mauna Kea Obs. (568)	50	res · 4:5	35.1	0.06	4	33.2	37.0	—	MPC · JPL

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1994

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1994 ES₂	13 March 1994	J. X. Luu D. C. Jewitt (568)	102	cubewano (cold)	45.6	0.11	1	40.4	50.8	BR-mag: 1.65	MPC · JPL
1994 TG	3 October 1994	Mauna Kea Obs. (568)	187	cubewano (hot)	42.3	0.00	7	42.3	42.3	—	MPC · JPL
1994 TG₂	8 October 1994	La Silla Obs. (809)	135	cubewano?	42.4	0.00	2	42.4	42.4	—	MPC · JPL
1994 TH	3 October 1994	Mauna Kea Obs. (568)	146	other TNO	40.9	0.00	16	40.9	40.9	—	MPC · JPL

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1995

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1995 DB₂	24 February 1995	D. C. Jewitt J. X. Luu (568)	102	cubewano (cold)	46.2	0.13	4	40.1	52.2	—	MPC · JPL
1995 FB₂₁	29 March 1995	Siding Spring Observatory (413)	107	cubewano?	42.4	0.00	1	42.4	42.4	—	MPC · JPL
1995 GA₇	3 April 1995	Mauna Kea Obs. (568)	153	plutino?	39.5	0.12	4	34.8	44.2	—	MPC · JPL
1995 GJ	3 April 1995	Mauna Kea Obs. (568)	187	other TNO	42.9	0.09	23	39.0	46.8	—	MPC · JPL
1995 GY₇	6 April 1995	La Silla Obs. (809)	107	cubewano?	41.3	0.00	1	41.3	41.3	—	MPC · JPL
1995 KJ₁	30 May 1995	Mauna Kea Obs. (568)	170	cubewano?	43.5	0.00	3	43.5	43.5	—	MPC · JPL
1995 KK₁	30 May 1995	Mauna Kea Obs. (568)	97	plutino?	39.5	0.19	9	32.0	47.0	—	MPC · JPL
1995 YY₃	24 December 1995	Mauna Kea Obs. (568)	97	other TNO	39.2	0.22	0	30.6	47.7	—	MPC · JPL

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1996

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1996 AS₂₀	14 January 1996	Spacewatch (691)	76	centaur	35.8	0.62	11	13.6	58.0	—	MPC · JPL
1996 KV₁	21 May 1996	C. Trujillo D. C. Jewitt J. X. Luu (568)	163	cubewano (hot)	45.5	0.12	8	40.2	50.9	—	MPC · JPL
1996 KX₁	22 May 1996	Mauna Kea Obs. (568)	97	plutino?	39.5	0.10	2	35.7	43.4	—	MPC · JPL
1996 KY₁	16 May 1996	Mauna Kea Obs. (568)	122	plutino?	39.5	0.10	31	35.7	43.3	—	MPC · JPL
1996 PW	9 August 1996	Haleakala-NEAT/GEODSS (566)	10	damocloid	269.67	0.9	30.09	2.4	536.8	—	MPC · JPL
1996 RQ₂₀	6 September 1996	D. L. Rabinowitz (675)	196	other TNO	44.0	0.10	32	39.4	48.7	BR-mag: 1.56; taxonomy: IR	MPC · JPL

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1997

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1997 CW₂₉	8 February 1997	Mauna Kea Obs. (568)	243	plutino?	39.4	0.08	19	36.3	42.5	—	MPC · JPL
1997 GA₄₅	3 April 1997	B. Gladman (568)	89	cubewano (hot)	47.0	0.17	8	38.9	55.0	—	MPC · JPL
1997 QH₄	27 August 1997	D. C. Jewitt C. Trujillo J. X. Luu K. Berney (568)	187	cubewano (hot)	43.0	0.09	13	39.2	46.7	BR-mag: 1.68; taxonomy: RR	MPC · JPL
1997 RL₁₃	5 September 1997	Palomar Obs. (675)	59	cubewano?	44.5	0.00	6	44.5	44.5	—	MPC · JPL
1997 RX₉	7 September 1997	B. Gladman (675)	103	other TNO	41.8	0.05	30	39.7	44.0	—	MPC · JPL
1997 RY₆	6 September 1997	La Palma Obs. (950)	149	cubewano (hot)	41.4	0.00	12	41.4	41.4	—	MPC · JPL
1997 TX₈	5 October 1997	Palomar Obs. (675)	97	plutino?	39.3	0.19	9	32.0	46.6	—	MPC · JPL
1997 UG₂₅	26 October 1997	La Palma Obs. (950)	68	cubewano?	43.3	0.00	1	43.3	43.3	—	MPC · JPL

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1998

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
1998 FS₁₄₄	23 March 1998	Northfield Mount Hermon School (807)	212	cubewano (hot)	41.6	0.02	10	40.6	42.5	BR-mag: 1.53; taxonomy: IR	MPC · JPL
1998 HL₁₅₁	29 April 1998	D. C. Jewitt J. X. Luu C. Trujillo D. J. Tholen (568)	88	other TNO	40.7	0.09	28	37.2	44.3	BR-mag: 1.06	MPC · JPL
1998 HN₁₅₁	21 April 1998	J. Kormendy R. Wainscoat D. J. Tholen D. C. Jewitt (568)	80	other TNO	37.9	0.06	25	35.8	40.0	—	MPC · JPL
1998 HO₁₅₁	22 April 1998	R. Wainscoat J. Kormendy D. C. Jewitt J. X. Luu (568)	108	other TNO	41.3	0.10	17	37.3	45.2	—	MPC · JPL
1998 HR₁₅₁	28 April 1998	Mauna Kea Obs. (568)	89	cubewano?	45.5	0.12	7	39.9	51.1	—	MPC · JPL
1998 KD₆₆	29 May 1998	Cerro Tololo Obs. (807)	79	cubewano?	43.1	0.05	5	40.9	45.3	—	MPC · JPL
1998 KE₆₆	29 May 1998	Cerro Tololo Obs. (807)	54	cubewano?	42.1	0.00	3	42.1	42.1	—	MPC · JPL
1998 KF₆₆	29 May 1998	Cerro Tololo Obs. (807)	53	plutino?	39.5	0.21	6	31.1	47.9	—	MPC · JPL
1998 KG₆₆	29 May 1998	Cerro Tololo Obs. (807)	56	cubewano?	45.2	0.00	4	45.2	45.2	—	MPC · JPL
1998 KS₆₅	29 May 1998	G. Bernstein (807)	100	cubewano (cold)	44.2	0.04	1	42.3	46.0	BR-mag: 1.73; taxonomy: RR-IR	MPC · JPL
1998 KY₆₁	29 May 1998	G. Bernstein (807)	118	cubewano (cold)	44.7	0.04	2	43.0	46.5	—	MPC · JPL
1998 UR₄₃	22 October 1998	M. W. Buie (695)	106	plutino	39.4	0.22	9	30.8	48.1	BR-mag: 1.27; taxonomy: BR	MPC · JPL
1998 WS₃₁	18 November 1998	M. W. Buie (695)	108	plutino	39.4	0.20	7	31.4	47.3	BR-mag: 1.32; taxonomy: IR-BR	MPC · JPL
1998 WV₂₄	18 November 1998	M. W. Buie (695)	85	other TNO	39.0	0.04	2	37.4	40.6	BR-mag: 1.27; taxonomy: BR; binary: 91 km	MPC · JPL
1998 WV₃₁	19 November 1998	M. W. Buie (695)	153	plutino	39.3	0.27	6	28.6	50.1	BR-mag: 1.31; taxonomy: BR	MPC · JPL
1998 WW31	18 November 1998	M. W. Buie (695)	148	cubewano (hot)	44.7	0.09	7	40.7	48.6	albedo: 0.054; binary: 123 km	MPC · JPL
1998 WX₂₄	18 November 1998	M. W. Buie (695)	155	cubewano (cold)	43.3	0.04	1	41.5	45.1	BR-mag: 1.79; taxonomy: RR	MPC · JPL
1998 WY₃₁	18 November 1998	M. W. Buie (695)	136	cubewano (cold)	45.0	0.11	2	39.9	50.2	—	MPC · JPL
1998 WZ₂₄	18 November 1998	Kitt Peak Obs. (695)	116	plutino?	39.5	0.18	5	32.4	46.6	—	MPC · JPL
1998 WZ₃₁	19 November 1998	M. W. Buie (695)	116	plutino	39.4	0.17	15	32.8	46.1	BR-mag: 1.26; taxonomy: BB-BR	MPC · JPL

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1999–2007

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2008

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2008 AP₁₁₈	6 January 2008	Mauna Kea Obs. (568)	95	cubewano?	43.8	0.15	0	36.9	50.7	—	MPC · JPL
2008 AU₁₃₈	8 January 2008	Mauna Kea Obs. (568)	251	centaur	32.4	0.37	42	20.3	44.4	—	MPC · JPL
2008 JO₄₁	11 May 2008	Mauna Kea Obs. (568)	78	SDO	86.7	0.54	48	39.8	133	—	MPC · JPL
2008 LD₁₈	7 June 2008	Mauna Kea Obs. (568)	80	other TNO	40.2	0.30	14	27.9	52.4	—	MPC · JPL
2008 TA₂₃₉	7 October 2008	D. J. Tholen (T14)	143	plutino	39.7	0.10	32	35.7	43.8	—	MPC · JPL
2008 UA₃₃₂	26 October 2008	L. H. Wasserman (807)	218	res · 1:4	76.5	0.51	30	37.0	116	—	MPC · JPL

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2009–2018

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2019

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2019 AC₇₇	11 January 2019	Cerro Tololo Obs. (807)	181	SDO	57.1	0.38	12	35.3	78.9	—	MPC · JPL
2019 EA₅	6 March 2019	Cerro Tololo Obs. (807)	171	SDO	69.8	0.45	28	38.2	101	—	MPC · JPL
2019 EB₅	4 March 2019	Cerro Tololo Obs. (807)	155	SDO	52.3	0.32	8	35.6	68.9	—	MPC · JPL
2019 ET₅	5 March 2019	Mauna Kea Obs. (568)	187	SDO	52.4	0.26	12	38.9	66.0	—	MPC · JPL
2019 EU5	6 January 2016	Mauna Kea Obs. (568)	198	EDDO	973	0.95	18	46.7	1900	ETNO	MPC · JPL
2019 EV₅	5 March 2019	Mauna Kea Obs. (568)	117	SDO	55.7	0.43	9	31.7	79.8	—	MPC · JPL
2019 GJ₂₃	5 April 2019	Korea Microlensing Telescope Network-CTIO (W93)	130	cubewano (cold)	43.7	0.08	1	40.4	47.0	—	MPC · JPL
2019 GZ₁₂₉	4 April 2019	Cerro Tololo Obs. (807)	146	SDO	61.8	0.36	9	39.3	84.3	—	MPC · JPL
2019 QQ₈	28 August 2019	Pan-STARRS (F51)	10	centaur	61.8	0.89	24	6.8	117	—	MPC · JPL
2019 RO₄	4 September 2019	Lowell Discovery Tel. (G37)	164	other TNO	42.0	0.17	20	34.7	49.3	—	MPC · JPL
2019 SJ₁₈₇	26 September 2019	Cerro Tololo Obs. (807)	192	SDO	74.5	0.50	21	36.9	112	—	MPC · JPL
2019 SS₁₄₉	24 September 2019	Cerro Tololo Obs. (807)	213	SDO	119	0.70	15	35.4	203	—	MPC · JPL
2019 TX₇	7 October 2019	Pan-STARRS (F51)	10	centaur	33.2	0.80	5	6.6	59.9	—	MPC · JPL
2019 UH₁₂	27 October 2019	Pan-STARRS 2 (F52)	40	centaur	52.9	0.85	47	7.9	98.0	—	MPC · JPL

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2020

List of unnumbered trans-Neptunian objects: 2020

2021

List of unnumbered trans-Neptunian objects: 2021

2022

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2022 FA₇	12 April 2021	Korea Microlensing Telescope Network-CTIO (W93)	202	other TNO	44.0	0.31	15	30.5	57.5	—	MPC · JPL
2022 FR₆	1 March 2020	Korea Microlensing Telescope Network-CTIO (W93)	112	cubewano?	44.1	0.08	7	40.8	47.5	—	MPC · JPL
2022 GP₄	12 April 2021	Korea Microlensing Telescope Network-CTIO (W93)	81	cubewano?	43.6	0.12	10	38.5	48.8	—	MPC · JPL
2022 GY₃	16 April 2021	Korea Microlensing Telescope Network-CTIO (W93)	114	cubewano?	42.7	0.14	2	36.7	48.6	—	MPC · JPL
2022 GZ₃	16 April 2021	Korea Microlensing Telescope Network-CTIO (W93)	105	cubewano?	41.6	0.07	16	38.5	44.8	—	MPC · JPL

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2023

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2023 DP₅	19 February 2023	Mount Lemmon Survey (G96)		damocloid	93.37	0.95	118.4	4.8	181.94	—	MPC · JPL
2023 KQ14		Subaru Telescope		sednoid	252	0.738	11	66			^[5]

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2024

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2024 AW₁₅										—	MPC · JPL
2024 CC₃₀										—	MPC · JPL
2024 DJ₄										—	MPC · JPL
2024 EL₇										—	MPC · JPL
2024 FA₂₇										—	MPC · JPL
2024 FB₂₇										—	MPC · JPL
2024 FV₂₄										—	MPC · JPL
2024 FX₂₆										—	MPC · JPL
2024 FY₂₆										—	MPC · JPL
2024 FZ₂₆										—	MPC · JPL
2024 GF₃₀										—	MPC · JPL
2024 GG₃₀										—	MPC · JPL
2024 GT₄										—	MPC · JPL
2024 JD₂₇										—	MPC · JPL
2024 JL₂₃										—	MPC · JPL
2024 LY₉										—	MPC · JPL
2024 OR₄										—	MPC · JPL
2024 PL₁₇										—	MPC · JPL
2024 PP₃₈										—	MPC · JPL
2024 PP₈										—	MPC · JPL
2024 QX₁										—	MPC · JPL
2024 RA₂₂										—	MPC · JPL
2024 RQ₁₁										—	MPC · JPL
2024 TF₃										—	MPC · JPL
2024 XN₂₅										—	MPC · JPL
2024 XS₁₅										—	MPC · JPL

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2025

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
Designation	Date	Observer (Site)	D (km)	Class	a (AU)	e	i (°)	q (AU)	Q (AU)	Remarks	Refs
2025 BD₄										—	MPC · JPL
2025 BU₁₀										—	MPC · JPL
2025 DB₅₁										—	MPC · JPL
2025 DZ₄₈										—	MPC · JPL
2025 FU₁₂										—	MPC · JPL
2025 FX₁₉										—	MPC · JPL
2025 GG										—	MPC · JPL
2025 ML₅₈										—	MPC · JPL
2025 MM₆₆										—	MPC · JPL
2025 MP₃₅										—	MPC · JPL
2025 MV₁₃										—	MPC · JPL
2025 MW₄₇										—	MPC · JPL
2025 OO₁										—	MPC · JPL
2025 PA₂										—	MPC · JPL
2025 QY₂										—	MPC · JPL
2025 RY₁₁										—	MPC · JPL

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References

^ ^a ^b ^c ^d "List of Known Trans-Neptunian Objects". Johnston's Archive. 2 January 2022. Retrieved 16 April 2022.
^ ^a ^b ^c ^d "List Of Transneptunian Objects". Minor Planet Center. 16 April 2022.
^ ^a ^b ^c ^d "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 16 April 2022.
^ ^a ^b ^c ^d "MPC Database Search: a ≥ 30.1 AU". Minor Planet Center. Archived from the original on 2 October 2025. Retrieved 2 October 2025. 5542 trans-Neptunian objects
^ Chen, Ying-Tung; Lykawka, Patryk Sofia; Huang, Yukun; Kavelaars, J. J.; Fraser, Wesley C.; Bannister, Michele T.; Wang, Shiang-Yu; Chang, Chan-Kao; Lehner, Matthew J.; Yoshida, Fumi; Gladman, Brett; Alexandersen, Mike; Ashton, Edward; Choi, Young-Jun; Granados Contreras, A. Paula (14 July 2025). "Discovery and dynamics of a Sedna-like object with a perihelion of 66 au". Nature Astronomy: 1–8. arXiv:2508.02162. doi:10.1038/s41550-025-02595-7. ISSN 2397-3366.