// Workers AI · dad joke modeWhy did the trans-Neptunian object go to therapy? It was feeling a little spaced out.

	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 5,630 listed TNO objects (with a > 30.1 AU) 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, 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 May 2026^[update], there are 4,969 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

'26

TNOs by year of principle designation since 1992 (objects with a < 30.1 AU excluded). As of May 2026, there are 4,969 unnumbered TNOs and 1,049 numbered TNOs (Pluto from 1930 is not shown)^[2]^[3]^[4]^[5]

Numbered TNOs: 1,049 obj. (17.4%)
Unnumbered TNOs: 4,969 obj. (82.6%)

Split-up of numbered and unnumbered trans-Neptunian objects^[2]^[3]^[4]^[5]

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	D. C. Jewitt, J. X. Luu (568)	50	res · 4:5	35.3	0.06	4	33.1	37.5	albedo: 0.126	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)	83	cubewano (cold)	45.8	0.11	1	40.6	50.9	albedo: 0.152; BRmag: 1.65	MPC · JPL
1994 TG	3 October 1994	Maunakea (568)	188	cubewano (hot)	42.3	0.00	7	42.3	42.3	albedo: 0.079	MPC · JPL
1994 TG₂	8 October 1994	European Southern Observatory, La Silla (809)	136	cubewano (cold)?	42.4	0.00	2	42.4	42.4	albedo: 0.152	MPC · JPL
1994 TH	3 October 1994	Maunakea (568)	147	other TNO	40.9	0.00	16	40.9	40.9	albedo: 0.13	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)	96	cubewano (cold)	46.5	0.14	4	40.1	53.0	albedo: 0.152	MPC · JPL
1995 FB₂₁	29 March 1995	Siding Spring Observatory (413)	108	cubewano (cold)?	42.4	0.00	1	42.4	42.4	albedo: 0.152	MPC · JPL
1995 GA₇	3 April 1995	Maunakea (568)	154	plutino?	39.5	0.12	4	34.8	44.2	albedo: 0.074	MPC · JPL
1995 GJ	3 April 1995	Maunakea (568)	188	cubewano (hot)?	42.9	0.09	23	39.0	46.8	albedo: 0.079	MPC · JPL
1995 GY₇	6 April 1995	European Southern Observatory, La Silla (809)	108	cubewano (cold)?	41.3	0.00	1	41.3	41.3	albedo: 0.152	MPC · JPL
1995 KJ₁	30 May 1995	Maunakea (568)	171	cubewano (cold)?	43.5	0.00	3	43.5	43.5	albedo: 0.152	MPC · JPL
1995 KK₁	30 May 1995	Maunakea (568)	74	other TNO	39.5	0.19	9	32.0	47.0	albedo: 0.13	MPC · JPL
1995 YY₃	24 December 1995	Maunakea (568)	74	other TNO	39.6	0.22	0	30.8	48.4	albedo: 0.13	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	albedo: 0.058	MPC · JPL
1996 KV₁	21 May 1996	C. A. Trujillo, D. C. Jewitt, J. X. Luu (568)	164	cubewano (hot)	45.0	0.11	8	40.2	49.9	albedo: 0.079	MPC · JPL
1996 KX₁	22 May 1996	Maunakea (568)	97	plutino?	39.5	0.10	2	35.7	43.4	albedo: 0.074	MPC · JPL
1996 KY₁	16 May 1996	Maunakea (568)	123	plutino?	39.5	0.10	31	35.7	43.3	albedo: 0.074	MPC · JPL
1996 PW	9 August 1996	NEAT (566)	10	damocloid	272.4	0.99	30	2.6	542.2	albedo: 0.048	MPC · JPL
1996 RQ₂₀	6 September 1996	D. L. Rabinowitz (675)	185	cubewano (hot)	44.1	0.10	32	39.6	48.7	albedo: 0.079; BRmag: 1.57; 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	Maunakea (568)	245	plutino?	39.4	0.08	19	36.3	42.5	albedo: 0.074	MPC · JPL
1997 GA₄₅	3 April 1997	B. Gladman (568)	90	cubewano (hot)?	47.1	0.18	8	38.8	55.4	albedo: 0.079	MPC · JPL
1997 QH₄	27 August 1997	D. C. Jewitt, C. A. Trujillo, J. X. Luu, K. Berney (568)	188	cubewano (hot)	42.9	0.09	13	39.1	46.7	albedo: 0.079; BRmag: 1.94; taxonomy: RR	MPC · JPL
1997 RL₁₃	5 September 1997	Palomar Mountain (675)	60	cubewano (hot)?	44.5	0.00	6	44.5	44.5	albedo: 0.079	MPC · JPL
1997 RX₉	7 September 1997	B. Gladman (675)	103	cubewano (hot)	41.7	0.05	30	39.6	43.8	albedo: 0.079	MPC · JPL
1997 RY₆	6 September 1997	La Palma (950)	150	cubewano (hot)	41.4	0.00	12	41.4	41.4	albedo: 0.079	MPC · JPL
1997 TX₈	5 October 1997	Palomar Mountain (675)	94	cubewano (hot)?	39.3	0.19	9	32.0	46.6	albedo: 0.079	MPC · JPL
1997 UG₂₅	26 October 1997	La Palma (950)	68	cubewano (cold)?	43.3	0.00	1	43.3	43.3	albedo: 0.152	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)	213	cubewano (hot)	41.7	0.02	10	40.7	42.7	albedo: 0.079; BRmag: 1.53; taxonomy: IR	MPC · JPL
1998 HL₁₅₁	29 April 1998	D. C. Jewitt, J. X. Luu, C. A. Trujillo, D. J. Tholen (568)	88	other TNO	40.6	0.09	28	36.9	44.3	albedo: 0.13; BRmag: 1.06	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	albedo: 0.13	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	albedo: 0.079	MPC · JPL
1998 HR₁₅₁	28 April 1998	Maunakea (568)	90	cubewano (hot)?	45.5	0.12	7	39.9	51.1	albedo: 0.079	MPC · JPL
1998 KD₆₆	29 May 1998	Cerro Tololo Observatory, La Serena (807)	78	cubewano (hot)?	43.1	0.05	5	40.9	45.3	albedo: 0.079	MPC · JPL
1998 KE₆₆	29 May 1998	Cerro Tololo Observatory, La Serena (807)	54	cubewano (cold)?	42.1	0.00	3	42.1	42.1	albedo: 0.152	MPC · JPL
1998 KF₆₆	29 May 1998	Cerro Tololo Observatory, La Serena (807)	54	plutino?	39.5	0.21	6	31.1	47.9	albedo: 0.074	MPC · JPL
1998 KG₆₆	29 May 1998	Cerro Tololo Observatory, La Serena (807)	57	cubewano (cold)?	45.2	0.00	4	45.2	45.2	albedo: 0.152	MPC · JPL
1998 KS₆₅	29 May 1998	G. Bernstein (807)	101	cubewano (cold)	43.7	0.03	1	42.3	45.2	albedo: 0.152; BRmag: 1.73; taxonomy: RR-IR	MPC · JPL
1998 KY₆₁	29 May 1998	G. Bernstein (807)	119	cubewano (cold)	44.3	0.05	2	42.1	46.5	albedo: 0.152	MPC · JPL
1998 UR₄₃	22 October 1998	M. W. Buie (695)	106	plutino	39.8	0.23	9	30.8	48.9	albedo: 0.074; BRmag: 1.27; taxonomy: BR	MPC · JPL
1998 WS₃₁	18 November 1998	M. W. Buie (695)	107	plutino	39.7	0.21	7	31.5	47.9	albedo: 0.074; BRmag: 1.32; taxonomy: IR-BR	MPC · JPL
1998 WV₂₄	18 November 1998	M. W. Buie (695)	162	plutino?	39.2	0.04	2	37.8	40.7	binary: 106 km; albedo: 0.074; BRmag: 1.27; taxonomy: BR	MPC · JPL
1998 WV₃₁	19 November 1998	M. W. Buie (695)	118	plutino	39.5	0.27	6	28.9	50.2	albedo: 0.074; BRmag: 1.34; taxonomy: BR	MPC · JPL
1998 WW31	18 November 1998	M. W. Buie (695)	145	cubewano (hot)	44.9	0.08	7	41.3	48.5	binary: 121 km; albedo: 0.16	MPC · JPL
1998 WX₂₄	18 November 1998	M. W. Buie (695)	156	cubewano (cold)	43.6	0.04	1	42.0	45.2	albedo: 0.152; BRmag: 1.79; taxonomy: RR	MPC · JPL
1998 WY₃₁	18 November 1998	M. W. Buie (695)	137	cubewano (cold)	45.5	0.12	2	40.0	51.0	albedo: 0.152	MPC · JPL
1998 WZ₂₄	18 November 1998	Kitt Peak (695)	88	other TNO	39.5	0.18	5	32.4	46.6	albedo: 0.13	MPC · JPL
1998 WZ₃₁	19 November 1998	M. W. Buie (695)	111	plutino	39.8	0.17	15	33.0	46.6	albedo: 0.074; BRmag: 1.26; taxonomy: IR-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	P. A. Wiegert (568)	121	res · 4:7	43.9	0.16	1	37.0	50.8	albedo: 0.126	MPC · JPL
2008 AU₁₃₈	8 January 2008	Maunakea (568)	256	centaur	32.5	0.37	43	20.4	44.5	albedo: 0.058	MPC · JPL
2008 BN₁₈	30 January 2008	Spacewatch (291)	11	damocloid	35.2	0.93	29	2.6	67.8	albedo: 0.048	MPC · JPL
2008 JO₄₁	11 May 2008	Maunakea (568)	79	SDO	86.7	0.54	49	39.9	133.4	albedo: 0.124	MPC · JPL
2008 LD₁₈	7 June 2008	Maunakea (568)	81	other TNO	40.2	0.31	15	28.0	52.5	albedo: 0.13	MPC · JPL
2008 QQ₅₃	—	—	—	—	46.1	0.18	8	37.8	54.5	—	MPC · JPL
2008 TA₂₃₉	7 October 2008	D. J. Tholen (T14)	144	plutino	39.7	0.10	32	35.7	43.8	albedo: 0.074	MPC · JPL
2008 UA₃₃₂	26 October 2008	L. H. Wasserman (807)	220	res · 1:4	76.4	0.51	31	37.1	115.6	albedo: 0.126; taxonomy: BR	MPC · JPL

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2009–2023

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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	10 January 2024	WFST, Lenghu (O18)	164	plutino	39.7	0.30	4	27.9	51.5	albedo: 0.074	MPC · JPL
2024 CC₃₀	7 February 2024	Cerro Tololo-DECam (W84)	152	other TNO	58.4	0.10	84	52.6	64.2	albedo: 0.13	MPC · JPL
2024 CE₃₀	7 February 2024	Cerro Tololo-DECam (W84)	150	other TNO	37.3	0.10	26	33.7	40.9	albedo: 0.13	MPC · JPL
2024 DJ₄	18 February 2024	Pan-STARRS 1 (F51)	4	unusual	38.7	0.92	25	3.2	74.3	albedo: 0.051	MPC · JPL
2024 EL₇	4 March 2024	Korea Microlensing Telescope Network-CTIO (W93)	160	cubewano (cold)?	43.0	0.10	1	38.7	47.4	albedo: 0.152	MPC · JPL
2024 FA₂₇	—	—	209	centaur	74.8	0.75	8	18.7	130.8	albedo: 0.058	MPC · JPL
2024 FB₂₇	16 March 2024	Cerro Tololo-DECam (W84)	201	other TNO	38.4	0.11	2	34.1	42.7	albedo: 0.13	MPC · JPL
2024 FV₂₄	19 March 2024	Pan-STARRS 1 (F51)	10	centaur	61.7	0.89	31	6.6	116.8	albedo: 0.058	MPC · JPL
2024 FX₂₆	16 March 2024	Cerro Tololo-DECam (W84)	152	SDO	251.2	0.84	16	40.9	461.5	albedo: 0.124	MPC · JPL
2024 FY₂₆	16 March 2024	Cerro Tololo-DECam (W84)	107	SDO	80.6	0.59	6	32.9	128.3	albedo: 0.124	MPC · JPL
2024 FZ₂₆	16 March 2024	Cerro Tololo-DECam (W84)	217	twotino	48.1	0.28	8	34.5	61.6	albedo: 0.126	MPC · JPL
2024 GF₃₀	3 April 2024	Cerro Tololo-DECam (W84)	214	other TNO	41.6	0.17	37	34.7	48.5	albedo: 0.13	MPC · JPL
2024 GG₃₀	3 April 2024	Cerro Tololo-DECam (W84)	163	centaur	46.9	0.41	31	27.9	66.0	albedo: 0.058	MPC · JPL
2024 GT₄	4 April 2024	ATLAS South Africa, Sutherland (M22)	146	centaur	33.4	0.54	35	15.4	51.4	albedo: 0.058	MPC · JPL
2024 JD₂₇	2 May 2024	Pan-STARRS 1 (F51)	3	damocloid	41.4	0.93	58	3.1	79.8	albedo: 0.048	MPC · JPL
2024 LY₉	15 June 2024	Pan-STARRS 2 (F52)	35	centaur	60.2	0.84	146	9.7	110.7	albedo: 0.058	MPC · JPL
2024 OR₄	30 July 2024	Purple Mountain Observatory, XuYi Station (D29)	107	centaur	35.8	0.52	19	17.2	54.4	albedo: 0.058	MPC · JPL
2024 PL₁₇	15 August 2024	Pan-STARRS 1 (F51)	37	centaur	87.4	0.93	142	6.6	168.2	albedo: 0.058	MPC · JPL
2024 PP₃₈	3 August 2024	Pan-STARRS 1 (F51)	44	centaur	187.3	0.97	153	6.3	368.4	albedo: 0.058	MPC · JPL
2024 PP₈	15 August 2024	Calar Alto-Schmidt (Z84)	4	damocloid	92.4	0.97	136	2.9	181.8	albedo: 0.048	MPC · JPL
2024 QX₁	27 August 2024	Pan-STARRS 1 (F51)	4	damocloid	255.8	0.99	144	3.1	508.5	albedo: 0.048	MPC · JPL
2024 RA₂₂	11 September 2024	Pan-STARRS 2 (F52)	96	centaur	53.6	0.64	26	19.4	87.8	albedo: 0.058	MPC · JPL
2024 RQ₁₁	1 September 2024	Pan-STARRS 2 (F52)	2.3	damocloid	58.2	0.95	133	2.7	113.7	albedo: 0.048	MPC · JPL
2024 TF₃	3 October 2024	Pan-STARRS 2 (F52)	42	centaur	47.9	0.77	89	10.9	84.8	albedo: 0.058	MPC · JPL
2024 XN₂₅	8 December 2024	Pan-STARRS 2 (F52)	2.7	damocloid	55.4	0.95	98	2.7	108.1	albedo: 0.048	MPC · JPL
2024 XR₄₉	2 December 2024	Subaru Telescope, Maunakea (T09)	139	other TNO	48.2	0.24	19	36.4	59.9	albedo: 0.13	MPC · JPL
2024 XS₁₅	2 December 2024	Kitt Peak-Bok (V00)	4	centaur	48.1	0.89	29	5.3	91.0	albedo: 0.058	MPC · JPL
2024 XS₄₉	3 December 2024	Subaru Telescope, Maunakea (T09)	251	SDO	69.3	0.49	19	35.3	103.4	albedo: 0.124	MPC · JPL
2024 XT₄₉	3 December 2024	Subaru Telescope, Maunakea (T09)	121	other TNO	47.9	0.29	9	34.2	61.6	albedo: 0.13	MPC · JPL
2024 XW₄₉	4 December 2024	Subaru Telescope, Maunakea (T09)	92	other TNO	45.9	0.18	10	37.5	54.4	binary: 72 km; albedo: 0.13	MPC · JPL
2024 XX₄₉	2 December 2024	Subaru Telescope, Maunakea (T09)	195	centaur	39.9	0.25	12	30.0	49.9	albedo: 0.058	MPC · JPL

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2025

List of unnumbered trans-Neptunian objects: 2025

2026

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
2026 AZ₁₇	—	—	—	—	64.6	0.96	36	2.5	126.7	—	MPC · JPL
2026 HO₅	—	—	—	—	49.6	0.64	40	17.9	81.2	—	MPC · JPL

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References

1 2 3 "List of Known Trans-Neptunian Objects". Johnston's Archive. 19 June 2025. Retrieved 19 October 2025.
1 2 3 "List Of Transneptunian Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
1 2 3 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
1 2 3 "List Of Other Unusual Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
1 2 3 "MPC Database Search: a ≥ 30.1 AU". Minor Planet Center. Archived from the original on 2 November 2025. Retrieved 2 November 2025. 5561 trans-Neptunian objects

External links

How many dwarf planets are there in the outer solar system?, Michael Brown, Caltech
OSSOS TNODB by the Outer Solar System Origins Survey
Known extreme outer solar system objects, Scott Sheppard, Carnegie Science Center

[TNO-list-Johnstons-1] 1 2 3 "List of Known Trans-Neptunian Objects". Johnston's Archive. 19 June 2025. Retrieved 19 October 2025.

[MPC-List-TNOs-2] 1 2 3 "List Of Transneptunian Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.

[MPC-List-Cen-and-SDO-3] 1 2 3 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.

[MPC-List-Unusual-4] 1 2 3 "List Of Other Unusual Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.

[MPC-a30.1-5] 1 2 3 "MPC Database Search: a ≥ 30.1 AU". Minor Planet Center. Archived from the original on 2 November 2025. Retrieved 2 November 2025. 5561 trans-Neptunian objects

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This page was redesigned at the edge.

A page that knows where it met you.

// Workers AI · dad joke modeWhy did the trans-Neptunian object go to therapy? It was feeling a little spaced out.

Statistics

List

1993

1994

1995

1996

1997

1998

1999–2007

2008

2009–2023

2024

2025

2026

See also

References

External links