List of unnumbered trans-Neptunian objects

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).

For the list of numbered TNOs, see List of trans-Neptunian objects.

TNOs: a vs. e (semi-log plot, 30–1000 AU):[1]

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)[1]

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^[update], 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

See also: List of possible dwarf planets § list

See also: Minor-planet moon § Trans-Neptunian objects

1993

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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

• List of unnumbered trans-Neptunian objects: 1999
• List of unnumbered trans-Neptunian objects: 2000
• List of unnumbered trans-Neptunian objects: 2001
• List of unnumbered trans-Neptunian objects: 2002
• List of unnumbered trans-Neptunian objects: 2003
• List of unnumbered trans-Neptunian objects: 2004
• List of unnumbered trans-Neptunian objects: 2005
• List of unnumbered trans-Neptunian objects: 2006
• List of unnumbered trans-Neptunian objects: 2007

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2008

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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

• List of unnumbered trans-Neptunian objects: 2009
• List of unnumbered trans-Neptunian objects: 2010
• List of unnumbered trans-Neptunian objects: 2011
• List of unnumbered trans-Neptunian objects: 2012
• List of unnumbered trans-Neptunian objects: 2013
• List of unnumbered trans-Neptunian objects: 2014
• List of unnumbered trans-Neptunian objects: 2015
• List of unnumbered trans-Neptunian objects: 2016
• List of unnumbered trans-Neptunian objects: 2017
• List of unnumbered trans-Neptunian objects: 2018

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2019

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
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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See also

• List of unnumbered minor planets
• List of the brightest Kuiper belt objects
• List of Solar System objects by greatest aphelion
• List of Solar System objects most distant from the Sun