 |
| TNOs:a vs.e (semi-log plot, 30–1000 AU):[1] |
Resonantplutinos (39 AU) andtwotinos (48 AU) Inner andouter classical objects (< 39 and > 49 AU) Otherresonant objects besides plutinos and twotinos Classical Kuiper belt objects (cubewanos) Scattered disc objects (SDO) Other TNOs (dots) andcentaurs (asterisk) Sednoids, prominentETNOs |
 |
| 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 unnumberedtrans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year ofprincipal provisional designation. The data is sourced from theMinor Planet Center's (MPC)List of Trans Neptunian Objects,List Of Centaurs and Scattered-Disk Objects,List Of Other Unusual Objects, andDatabase Search.[2][3][4][5] These objects will eventually benumbered as secured discoveries with an officialdiscoverer determined by the MPC. Until then, additional observations are needed to sufficiently decrease an object'sorbital uncertainty. As of October 2025[update], there are4,512 unnumbered objects, defined here asminor planets with asemi-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 andbinary status with the satellite's diameter, as well as itsalbedo,spectral taxonomy andB–R color index.[1] Members of theextreme trans-Neptunian objects (ESDOs,EDDOs andsednoids) – with a semi-major axis greater than 150 AU andperihelion greater than 30 AU – are also identified.
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 TelescopeRubin 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 |
5548 trans-Neptunian objects
| Consensus | _(cropped).jpg)  | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Candidate (for TNOs, D+1σ ≥ 700 km or H ≤ 4.0) |
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