List of unnumbered trans-Neptunian objects

For the list of numbered TNOs, see List of 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, List Of Other Unusual Objects, and Database Search.^[2][3][4][5] 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).

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 5,342 listed TNO objects (with a > 30.1 AU) 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][5]

•   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][5]

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	35.3	0.06	4	33.1	37.5	—	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)	83	cubewano (cold)	45.8	0.11	1	40.6	50.9	—	MPC · JPL
1994 TG	3 October 1994	Mauna Kea Obs. (568)	188	cubewano (hot)?	42.3	0	7	42.3	42.3	—	MPC · JPL
1994 TG2	8 October 1994	La Silla Obs. (809)	136	cubewano (cold)?	42.4	0	2	42.4	42.4	—	MPC · JPL
1994 TH	3 October 1994	Mauna Kea Obs. (568)	147	other TNO	40.9	0	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)	96	cubewano (cold)	46.5	0.14	4	40.1	53	—	MPC · JPL
1995 FB21	29 March 1995	Siding Spring Obs. (413)	108	cubewano (cold)?	42.4	0	1	42.4	42.4	—	MPC · JPL
1995 GA7	3 April 1995	Mauna Kea Obs. (568)	154	plutino?	39.5	0.12	4	34.8	44.2	—	MPC · JPL
1995 GJ	3 April 1995	Mauna Kea Obs. (568)	188	cubewano (hot)?	42.9	0.09	23	39	46.8	—	MPC · JPL
1995 GY7	6 April 1995	La Silla Obs. (809)	108	cubewano (cold)?	41.3	0	1	41.3	41.3	—	MPC · JPL
1995 KJ1	30 May 1995	Mauna Kea Obs. (568)	171	cubewano (cold)?	43.5	0	3	43.5	43.5	—	MPC · JPL
1995 KK1	30 May 1995	Mauna Kea Obs. (568)	97	plutino?	39.5	0.19	9	32	47	—	MPC · JPL
1995 YY3	24 December 1995	Mauna Kea Obs. (568)	97	plutino?	39.6	0.22	0	30.8	48.4	—	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	—	MPC · JPL
1996 KV1	21 May 1996	C. Trujillo D. C. Jewitt J. X. Luu (568)	164	cubewano (hot)	45	0.11	8	40.2	49.9	—	MPC · JPL
1996 KX1	22 May 1996	Mauna Kea Obs. (568)	97	plutino?	39.5	0.1	2	35.7	43.4	—	MPC · JPL
1996 KY1	16 May 1996	Mauna Kea Obs. (568)	123	plutino?	39.5	0.1	31	35.7	43.3	—	MPC · JPL
1996 PW	9 August 1996	Haleakala-NEAT/GEODSS (566)	10	damocloid	272.4	0.99	30	2.6	542.2	—	MPC · JPL
1996 RQ20	6 September 1996	D. L. Rabinowitz (675)	197	cubewano (hot)	44.1	0.1	32	39.6	48.7	—	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)	245	plutino?	39.4	0.08	19	36.3	42.5	—	MPC · JPL
1997 GA45	3 April 1997	B. Gladman (568)	90	cubewano (hot)?	47.1	0.18	8	38.8	55.4	—	MPC · JPL
1997 QH4	27 August 1997	D. C. Jewitt C. Trujillo K. Berney (568)	188	cubewano (hot)	42.9	0.09	13	39.1	46.7	—	MPC · JPL
1997 RL13	5 September 1997	Palomar Obs. (675)	60	cubewano (hot)?	44.5	0	6	44.5	44.5	—	MPC · JPL
1997 RX9	7 September 1997	B. Gladman (675)	103	cubewano (hot)	41.7	0.05	30	39.6	43.8	—	MPC · JPL
1997 RY6	6 September 1997	La Palma Obs. (950)	150	cubewano (hot)?	41.4	0	12	41.4	41.4	—	MPC · JPL
1997 TX8	5 October 1997	Palomar Obs. (675)	97	plutino?	39.3	0.19	9	32	46.6	—	MPC · JPL
1997 UG25	26 October 1997	La Palma Obs. (950)	68	cubewano (cold)?	43.3	0	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)	213	cubewano (hot)	41.7	0.02	10	40.7	42.7	—	MPC · JPL
1998 HL151	29 April 1998	D. C. Jewitt J. X. Luu C. Trujillo D. J. Tholen (568)	88	other TNO	40.6	0.09	28	36.9	44.3	—	MPC · JPL
1998 HN151	21 April 1998	J. Kormendy R. Wainscoat D. J. Tholen D. C. Jewitt (568)	83	other TNO	37.9	0.05	25	35.9	39.8	—	MPC · JPL
1998 HO151	22 April 1998	R. Wainscoat J. Kormendy D. C. Jewitt J. X. Luu (568)	108	cubewano (hot)	41.3	0.09	17	37.5	45.1	—	MPC · JPL
1998 HR151	28 April 1998	Mauna Kea Obs. (568)	90	cubewano (hot)?	45.5	0.12	7	39.9	51.1	—	MPC · JPL
1998 KD66	29 May 1998	Cerro Tololo Obs. (807)	78	cubewano (hot)?	43.1	0.05	5	40.9	45.3	—	MPC · JPL
1998 KE66	29 May 1998	Cerro Tololo Obs. (807)	54	cubewano (cold)?	42.1	0	3	42.1	42.1	—	MPC · JPL
1998 KF66	29 May 1998	Cerro Tololo Obs. (807)	54	plutino?	39.5	0.21	6	31.1	47.9	—	MPC · JPL
1998 KG66	29 May 1998	Cerro Tololo Obs. (807)	57	cubewano (cold)?	45.2	0	4	45.2	45.2	—	MPC · JPL
1998 KS65	29 May 1998	G. Bernstein (807)	101	cubewano (cold)	43.7	0.03	1	42.3	45.2	—	MPC · JPL
1998 KY61	29 May 1998	G. Bernstein (807)	119	cubewano (cold)	44.3	0.05	2	42.1	46.5	—	MPC · JPL
1998 UR43	22 October 1998	M. W. Buie (695)	107	plutino	39.8	0.23	9	30.8	48.9	—	MPC · JPL
1998 WS31	18 November 1998	M. W. Buie (695)	109	plutino	39.7	0.21	7	31.5	47.9	—	MPC · JPL
1998 WV24	18 November 1998	M. W. Buie (695)	122	plutino?	39.2	0.04	2	37.8	40.7	—	MPC · JPL
1998 WV31	19 November 1998	M. W. Buie (695)	118	plutino	39.5	0.27	6	28.9	50.2	—	MPC · JPL
1998 WW31	18 November 1998	M. W. Buie (695)	145	cubewano (hot)	44.9	0.08	7	41.3	48.5	—	MPC · JPL
1998 WX24	18 November 1998	M. W. Buie (695)	156	cubewano (cold)	43.6	0.04	1	42	45.2	—	MPC · JPL
1998 WY31	18 November 1998	M. W. Buie (695)	137	cubewano (cold)	45.5	0.12	2	40	51	—	MPC · JPL
1998 WZ24	18 November 1998	Kitt Peak Obs. (695)	117	plutino?	39.5	0.18	5	32.4	46.6	—	MPC · JPL
1998 WZ31	19 November 1998	M. W. Buie (695)	111	plutino	39.8	0.17	15	33	46.6	—	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	P. A. Wiegert (568)	121	res · 4:7	43.9	0.16	1	37	50.8	—	MPC · JPL
2008 AU138	8 January 2008	Mauna Kea Obs. (568)	256	centaur	32.5	0.37	43	20.4	44.5	—	MPC · JPL
2008 BN18	30 January 2008	Spacewatch (291)	11	damocloid	35.2	0.93	29	2.6	67.8	—	MPC · JPL
2008 JO41	11 May 2008	Mauna Kea Obs. (568)	79	SDO	86.7	0.54	49	39.9	133.4	—	MPC · JPL
2008 LD18	7 June 2008	Mauna Kea Obs. (568)	81	other TNO	40.2	0.31	15	28	52.5	—	MPC · JPL
2008 TA239	7 October 2008	D. J. Tholen (T14)	144	plutino	39.7	0.1	32	35.7	43.8	—	MPC · JPL
2008 UA332	26 October 2008	L. H. Wasserman (807)	219	res · 1:4	76.4	0.51	31	37.1	115.6	—	MPC · JPL

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2009–2023

• 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
• List of unnumbered trans-Neptunian objects: 2019
• List of unnumbered trans-Neptunian objects: 2020
• List of unnumbered trans-Neptunian objects: 2021
• List of unnumbered trans-Neptunian objects: 2022
• List of unnumbered trans-Neptunian objects: 2023

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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	10 January 2024	WFST (O18)	164	plutino	39.7	0.3	4	27.9	51.5	—	MPC · JPL
2024 CC30	7 February 2024	Cerro Tololo-DECam (W84)	—	—	58.4	0.1	84	52.6	64.2	—	MPC · JPL
2024 CE30	7 February 2024	Cerro Tololo-DECam (W84)	—	—	37.3	0.1	26	33.7	40.9	—	MPC · JPL
2024 DJ4	18 February 2024	Pan-STARRS 1 (F51)	4	unusual	38.7	0.92	25	3.2	74.3	—	MPC · JPL
2024 EL7	4 March 2024	KMTNet-CTIO (W93)	160	cubewano (cold)?	43	0.1	1	38.7	47.4	—	MPC · JPL
2024 FA27	16 March 2024	Cerro Tololo-DECam (W84)	—	—	88.5	0.8	9	17.8	159.1	—	MPC · JPL
2024 FB27	16 March 2024	Cerro Tololo-DECam (W84)	—	—	38.4	0.11	2	34.1	42.7	—	MPC · JPL
2024 FV24	19 March 2024	Pan-STARRS 1 (F51)	7	SDO	61.7	0.89	31	6.6	116.8	—	MPC · JPL
2024 FX26	16 March 2024	Cerro Tololo-DECam (W84)	—	—	251.2	0.84	16	40.9	461.5	—	MPC · JPL
2024 FY26	16 March 2024	Cerro Tololo-DECam (W84)	—	—	80.6	0.59	6	32.9	128.3	—	MPC · JPL
2024 FZ26	16 March 2024	Cerro Tololo-DECam (W84)	—	—	48.2	0.29	8	34.4	61.9	—	MPC · JPL
2024 GF30	3 April 2024	Cerro Tololo-DECam (W84)	—	—	42.5	0.16	37	35.6	49.3	—	MPC · JPL
2024 GG30	3 April 2024	Cerro Tololo-DECam (W84)	—	—	46.9	0.41	31	27.9	66	—	MPC · JPL
2024 GT4	4 April 2024	ATLAS–SAAO (M22)	146	centaur	33.4	0.54	35	15.4	51.4	—	MPC · JPL
2024 JD27	2 May 2024	Pan-STARRS 1 (F51)	3	damocloid	41.4	0.93	58	3.1	79.8	—	MPC · JPL
2024 JL23	7 May 2024	Pan-STARRS 2 (F52)	19	SDO	76.5	0.85	22	11.5	141.4	—	MPC · JPL
2024 LY9	15 June 2024	Pan-STARRS 2 (F52)	24	SDO	60.2	0.84	146	9.7	110.7	—	MPC · JPL
2024 OR4	30 July 2024	Purple Mountain Observatory, XuYi Station (D29)	102	centaur	35.8	0.52	19	17.2	54.4	—	MPC · JPL
2024 PL17	15 August 2024	Pan-STARRS 1 (F51)	24	SDO	87.4	0.93	142	6.6	168.2	—	MPC · JPL
2024 PP38	3 August 2024	Pan-STARRS 1 (F51)	—	—	187.3	0.97	153	6.3	368.4	—	MPC · JPL
2024 PP8	15 August 2024	Calar Alto-Schmidt (Z84)	4	damocloid	92.4	0.97	136	2.9	181.9	—	MPC · JPL
2024 QX1	27 August 2024	Pan-STARRS 1 (F51)	4	damocloid	255.8	0.99	144	3.1	508.5	—	MPC · JPL
2024 RA22	11 September 2024	Pan-STARRS 2 (F52)	92	centaur	53.6	0.64	26	19.4	87.8	—	MPC · JPL
2024 RQ11	1 September 2024	Pan-STARRS 2 (F52)	2.3	damocloid	58.2	0.95	133	2.7	113.7	—	MPC · JPL
2024 TF3	3 October 2024	Pan-STARRS 2 (F52)	42	centaur	47.9	0.77	89	10.9	84.8	—	MPC · JPL
2024 XN25	8 December 2024	Pan-STARRS 2 (F52)	2.7	damocloid	55.4	0.95	98	2.7	108.1	—	MPC · JPL
2024 XS15	2 December 2024	Kitt Peak Obs.-Bok (V00)	4	centaur	48.1	0.89	29	5.3	91	—	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	19 January 2025	Pan-STARRS 1 (F51)	52	centaur	73.1	0.84	10	11.7	134.4	—	MPC · JPL
2025 BU10	27 January 2025	Mt. Lemmon Survey (G96)	14	centaur	78.1	0.91	54	7.3	149	—	MPC · JPL
2025 DB51	25 February 2025	Kitt Peak Obs.-Bok (V00)	48	centaur	500.6	0.97	105	13.7	987.6	—	MPC · JPL
2025 DZ48	24 February 2025	Mt. Lemmon Survey (G96)	19	centaur	33.9	0.81	63	6.4	61.4	—	MPC · JPL
2025 FU12	22 March 2025	Pan-STARRS 2 (F52)	30	centaur	42.9	0.79	15	9	76.9	—	MPC · JPL
2025 FX19	30 March 2025	Pan-STARRS 1 (F51)	75	centaur	38.7	0.66	41	13.3	64.2	—	MPC · JPL
2025 GG	2 April 2025	Pan-STARRS 1 (F51)	54	centaur	54	0.81	22	10.4	97.6	—	MPC · JPL
2025 ML58	22 April 2025	Simonyi Survey Telescope Rubin Obs. (X05)	—	—	51.1	0.4	16	30.7	71.5	—	MPC · JPL
2025 MM66	2 May 2025	Simonyi Survey Telescope Rubin Obs. (X05)	—	—	47.5	0.23	9	36.8	58.2	—	MPC · JPL
2025 MP35	22 April 2025	Simonyi Survey Telescope Rubin Obs. (X05)	—	—	46.1	0.19	10	37.3	54.9	—	MPC · JPL
2025 MV13	2 May 2025	Simonyi Survey Telescope Rubin Obs. (X05)	—	—	39.2	0.25	22	29.6	48.9	—	MPC · JPL
2025 MW47	28 April 2025	Simonyi Survey Telescope Rubin Obs. (X05)	—	—	39.1	0.32	7	26.8	51.5	—	MPC · JPL
2025 OO1	22 July 2025	Pan-STARRS 2 (F52)	—	—	52.7	0.26	20	38.9	66.6	—	MPC · JPL
2025 PA2	15 August 2025	Pan-STARRS 2 (F52)	—	—	42.8	0.2	9	34.2	51.4	—	MPC · JPL
2025 QY2	16 August 2025	WFST (O18)	—	—	54.4	0.49	10	27.5	81.2	—	MPC · JPL
2025 RY11	15 September 2025	Pan-STARRS 2 (F52)	—	—	34.9	0.82	17	6.4	63.3	—	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