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List of unnumbered trans-Neptunian objects

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For the list of numbered TNOs, see List of trans-Neptunian objects.
Full region – by eccentricity
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

cold classical: 1,226 objects (23.0%)hot classical: 1,119 objects (20.9%)SDOs: 770 objects (14.4%)plutinos (3∶2 res.): 577 objects (10.8%)other resonances: 504 objects (9.4%)centaurs: 314 objects (5.9%)twotinos (2∶1 res.): 142 objects (2.7%)damocloids: 85 objects (1.6%)neptune trojans: 28 objects (0.5%)EDDOs: 15 objects (0.3%)ESDOs: 13 objects (0.2%)haumeids: 12 objects (0.2%)unusual: 6 objects (0.1%)sednoids: 3 objects (0.1%)amors: 3 objects (0.1%)unclassified TNOs: 525 objects (9.8%)
Distribution of 5,342 listed TNO objects (with a > 30.1 AU) by subclass from Johnston's Archive (hover)[1]

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 November 2025, there are 4,518 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

[edit]
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    4,518 unnumbered TNOs and    1,037 numbered TNOs (Pluto from 1930 is not shown)[2][3][4][5]
Numbered TNOs: 1,037 obj. (18.7%)Unnumbered TNOs: 4,518 obj. (81.3%)
  •   Numbered TNOs: 1,037 obj. (18.7%)
  •   Unnumbered TNOs: 4,518 obj. (81.3%)
Split-up of numbered and unnumbered trans-Neptunian objects[2][3][4][5]

List

[edit]
See also: List of possible dwarf planets § list
See also: Minor-planet moon § Trans-Neptunian objects

1993

[edit]
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

1994

[edit]
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

1995

[edit]
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

1996

[edit]
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

1997

[edit]
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

1998

[edit]
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

1999–2007

[edit]

2008

[edit]
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

2009–2023

[edit]

2024

[edit]
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

2025

[edit]
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
2025 TS13 12 October 2025 WFST (O18) — — 47.1 0.94 95 3 91.3 — MPC · JPL
2025 TT13 1 October 2025 Kitt Peak Obs.-Bok (V00) — — 39.3 0.92 153 3.2 75.4 — MPC · JPL

See also

[edit]

References

[edit]
  1. ^ a b c d "List of Known Trans-Neptunian Objects". Johnston's Archive. 19 June 2025. Retrieved 19 October 2025.
  2. ^ a b c d "List Of Transneptunian Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
  3. ^ a b c d "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
  4. ^ a b c d "List Of Other Unusual Objects". Minor Planet Center. 19 October 2025. Retrieved 19 October 2025.
  5. ^ a b c d "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
[edit]
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