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 and List Of Centaurs and Scattered-Disk Objects.[2][3] 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 2020, there are 2,786 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).[lower-alpha 1]
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TNOs plot — semi-major axis (a) against:[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 |
The list also contains information from the "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
- Numbered TNOs: 678 obj. (19.6%)
- Unnumbered TNOs: 2,786 obj. (80.4%)
List
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 | D. C. Jewitt J. X. Luu (568) | 70 | plutino? | 39.3 | 0.11 | 3 | 34.9 | 43.8 | — | MPC · JPL |
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) | 134 | cubewano (cold) | 46.0 | 0.12 | 1 | 40.5 | 51.5 | BR-mag: 1.65 | MPC · JPL |
| 1994 EV3 | 13 March 1994 | D. C. Jewitt J. X. Luu (568) | 168 | cubewano (cold) | 43.2 | 0.04 | 2 | 41.7 | 44.7 | BR-mag: 1.73; taxonomy: RR | MPC · JPL |
| 1994 TG | 3 October 1994 | J. Chen D. C. Jewitt G. Knopp (568) | 176 | cubewano (hot) | 42.3 | 0.00 | 7 | 42.3 | 42.3 | — | MPC · JPL |
| 1994 TG2 | 8 October 1994 | O. R. Hainaut (809) | 176 | cubewano (cold) | 42.4 | 0.00 | 2 | 42.4 | 42.4 | — | MPC · JPL |
| 1994 TH | 3 October 1994 | J. Chen D. C. Jewitt G. Knopp (568) | 176 | other TNO | 40.9 | 0.00 | 16 | 40.9 | 40.9 | — | MPC · JPL |
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) | 134 | cubewano (cold) | 46.3 | 0.13 | 4 | 40.2 | 52.4 | — | MPC · JPL |
| 1995 DC2 | 24 February 1995 | J. X. Luu D. C. Jewitt (568) | 161 | cubewano (cold) | 44.2 | 0.07 | 2 | 41.3 | 47.1 | — | MPC · JPL |
| 1995 FB21 | 29 March 1995 | S. F. Green N. McBride (413) | 140 | cubewano (cold) | 42.4 | 0.00 | 1 | 42.4 | 42.4 | — | MPC · JPL |
| 1995 GA7 | 3 April 1995 | J. Chen D. C. Jewitt (568) | 140 | plutino? | 39.5 | 0.12 | 4 | 34.8 | 44.2 | — | MPC · JPL |
| 1995 GJ | 3 April 1995 | D. C. Jewitt J. Chen (568) | 176 | cubewano (hot) | 42.9 | 0.09 | 23 | 39.0 | 46.8 | — | MPC · JPL |
| 1995 GY7 | 6 April 1995 | C.-I. Lagerkvist (809) | 140 | cubewano (cold) | 41.3 | 0.00 | 1 | 41.3 | 41.3 | — | MPC · JPL |
| 1995 HM5 | 26 April 1995 | J. X. Luu (807) | 128 | plutino | 39.8 | 0.26 | 5 | 29.6 | 50.1 | BR-mag: 1.22; taxonomy: BR | MPC · JPL |
| 1995 KJ1 | 30 May 1995 | J. Chen (568) | 222 | cubewano (cold) | 43.5 | 0.00 | 3 | 43.5 | 43.5 | — | MPC · JPL |
| 1995 KK1 | 30 May 1995 | D. C. Jewitt (568) | 88 | plutino? | 39.5 | 0.19 | 9 | 32.0 | 47.0 | — | MPC · JPL |
| 1995 YY3 | 24 December 1995 | J. Chen D. C. Jewitt (568) | 88 | plutino? | 39.1 | 0.21 | 0 | 30.7 | 47.5 | — | MPC · JPL |
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 | A. Gleason (691) | 61 | 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) | 154 | cubewano (hot) | 45.6 | 0.12 | 8 | 40.2 | 51.0 | — | MPC · JPL |
| 1996 KX1 | 22 May 1996 | J. Chen C. Trujillo D. C. Jewitt J. X. Luu (568) | 88 | plutino? | 39.5 | 0.10 | 2 | 35.7 | 43.4 | — | MPC · JPL |
| 1996 KY1 | 16 May 1996 | J. X. Luu C. Trujillo D. C. Jewitt (568) | 111 | plutino? | 39.5 | 0.10 | 31 | 35.7 | 43.3 | — | MPC · JPL |
| 1996 RQ20 | 6 September 1996 | D. L. Rabinowitz (675) | 185 | cubewano (hot) | 43.7 | 0.10 | 32 | 39.4 | 48.0 | BR-mag: 1.56; taxonomy: IR | MPC · JPL |
| 1996 RR20 | 15 September 1996 | A. Fitzsimmons M. J. Irwin I. P. Williams (950) | 193 | plutino | 39.7 | 0.17 | 5 | 32.9 | 46.5 | BR-mag: 1.87; taxonomy: RR | MPC · JPL |
| 1996 TK66 | 9 October 1996 | B. Schmidt and the High-Z team (807) | 243 | cubewano (cold) | 42.6 | 0.01 | 3 | 42.0 | 43.3 | BR-mag: 1.62; taxonomy: RR | MPC · JPL |
| 1996 TS66 | 12 October 1996 | D. C. Jewitt J. X. Luu C. Trujillo (568) | 194 | cubewano (hot) | 43.6 | 0.12 | 7 | 38.3 | 49.0 | albedo: 0.120; BR-mag: 1.78; taxonomy: RR | MPC · JPL |
1997
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 1997 CT29 | 2 February 1997 | D. C. Jewitt J. X. Luu J. Chen C. Trujillo (568) | 222 | cubewano (cold) | 43.6 | 0.04 | 1 | 42.1 | 45.1 | — | MPC · JPL |
| 1997 CW29 | 8 February 1997 | J. X. Luu D. C. Jewitt C. Trujillo J. Chen (568) | 222 | plutino? | 39.4 | 0.08 | 19 | 36.3 | 42.5 | — | MPC · JPL |
| 1997 GA45 | 3 April 1997 | B. Gladman (568) | 84 | cubewano (hot) | 47.4 | 0.17 | 8 | 39.1 | 55.7 | — | MPC · JPL |
| 1997 QH4 | 27 August 1997 | D. C. Jewitt C. Trujillo J. X. Luu K. Berney (568) | 176 | cubewano (hot) | 42.6 | 0.08 | 13 | 39.2 | 46.0 | BR-mag: 1.68; taxonomy: RR | MPC · JPL |
| 1997 RL13 | 5 September 1997 | B. Gladman P. Nicholson J. A. Burns (675) | 56 | cubewano (hot) | 44.5 | 0.00 | 6 | 44.5 | 44.5 | — | MPC · JPL |
| 1997 RX9 | 7 September 1997 | B. Gladman (675) | 97 | cubewano (hot) | 41.6 | 0.06 | 30 | 39.2 | 43.9 | — | MPC · JPL |
| 1997 RY6 | 6 September 1997 | S. F. Green N. McBride (950) | 140 | cubewano (hot) | 41.4 | 0.00 | 12 | 41.4 | 41.4 | — | MPC · JPL |
| 1997 SZ10 | 24 September 1997 | D. C. Jewitt (568) | 88 | twotino | 47.7 | 0.36 | 12 | 30.4 | 64.9 | BR-mag: 1.79; taxonomy: RR | MPC · JPL |
| 1997 TX8 | 5 October 1997 | E. F. Helin D. L. Rabinowitz M. Hicks (675) | 88 | plutino? | 39.3 | 0.19 | 9 | 32.0 | 46.6 | — | MPC · JPL |
| 1997 UG25 | 26 October 1997 | E. Fletcher M. Irwin A. Fitzsimmons (950) | 88 | cubewano (cold) | 43.3 | 0.00 | 1 | 43.3 | 43.3 | — | MPC · JPL |
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) | 202 | cubewano (hot) | 41.9 | 0.02 | 10 | 41.2 | 42.6 | BR-mag: 1.53; taxonomy: IR | MPC · JPL |
| 1998 HH151 | 28 April 1998 | D. C. Jewitt J. X. Luu C. Trujillo D. J. Tholen (568) | 93 | plutino | 39.7 | 0.20 | 9 | 31.9 | 47.4 | — | MPC · JPL |
| 1998 HL151 | 29 April 1998 | D. C. Jewitt J. X. Luu C. Trujillo D. J. Tholen (568) | 106 | other TNO | 41.0 | 0.09 | 28 | 37.3 | 44.7 | BR-mag: 1.06 | MPC · JPL |
| 1998 HN151 | 21 April 1998 | J. Kormendy R. Wainscoat D. J. Tholen D. C. Jewitt (568) | 97 | other TNO | 38.0 | 0.05 | 25 | 36.0 | 40.1 | — | MPC · JPL |
| 1998 HO151 | 22 April 1998 | R. Wainscoat J. Kormendy D. C. Jewitt J. X. Luu (568) | 101 | cubewano (hot) | 41.5 | 0.09 | 17 | 37.6 | 45.3 | — | MPC · JPL |
| 1998 HR151 | 28 April 1998 | J. X. Luu C. Trujillo D. J. Tholen D. C. Jewitt (568) | 84 | cubewano (hot) | 45.5 | 0.12 | 7 | 39.9 | 51.1 | — | MPC · JPL |
| 1998 KD66 | 29 May 1998 | R. L. Allen M. Jarvis G. Bernstein (807) | 74 | cubewano (hot) | 43.1 | 0.05 | 5 | 40.9 | 45.3 | — | MPC · JPL |
| 1998 KE66 | 29 May 1998 | R. L. Allen M. Jarvis G. Bernstein (807) | 70 | cubewano (cold) | 42.1 | 0.00 | 3 | 42.1 | 42.1 | — | MPC · JPL |
| 1998 KF66 | 29 May 1998 | R. L. Allen M. Jarvis G. Bernstein (807) | 49 | plutino? | 39.5 | 0.21 | 6 | 31.1 | 47.9 | — | MPC · JPL |
| 1998 KG66 | 29 May 1998 | R. L. Allen M. Jarvis G. Bernstein (807) | 74 | cubewano (cold) | 45.2 | 0.00 | 4 | 45.2 | 45.2 | — | MPC · JPL |
| 1998 KS65 | 29 May 1998 | G. Bernstein (807) | 128 | cubewano (cold) | 43.8 | 0.04 | 1 | 42.2 | 45.4 | BR-mag: 1.73; taxonomy: RR-IR | MPC · JPL |
| 1998 KY61 | 29 May 1998 | G. Bernstein (807) | 154 | cubewano (cold) | 44.7 | 0.04 | 2 | 42.9 | 46.4 | — | MPC · JPL |
| 1998 UR43 | 22 October 1998 | M. W. Buie (695) | 97 | plutino | 39.2 | 0.22 | 9 | 30.8 | 47.7 | BR-mag: 1.27; taxonomy: BR | MPC · JPL |
| 1998 WG24 | 18 November 1998 | M. W. Buie (695) | 176 | cubewano (cold) | 45.3 | 0.12 | 2 | 39.8 | 50.9 | — | MPC · JPL |
| 1998 WS31 | 18 November 1998 | M. W. Buie (695) | 97 | plutino | 39.1 | 0.20 | 7 | 31.4 | 46.8 | BR-mag: 1.32; taxonomy: IR-BR | MPC · JPL |
| 1998 WV24 | 18 November 1998 | M. W. Buie (695) | 110 | other TNO | 38.8 | 0.04 | 2 | 37.2 | 40.3 | BR-mag: 1.27; taxonomy: BR; binary: 96 km | MPC · JPL |
| 1998 WV31 | 19 November 1998 | M. W. Buie (695) | 140 | plutino | 39.1 | 0.27 | 6 | 28.4 | 49.7 | BR-mag: 1.31; taxonomy: BR | MPC · JPL |
| 1998 WW31 | 18 November 1998 | M. W. Buie (695) | 148 | cubewano (hot) | 44.5 | 0.09 | 7 | 40.4 | 48.5 | albedo: 0.054; binary: 123 km | MPC · JPL |
| 1998 WX24 | 18 November 1998 | M. W. Buie (695) | 202 | cubewano (cold) | 43.1 | 0.05 | 1 | 41.1 | 45.1 | BR-mag: 1.79; taxonomy: RR | MPC · JPL |
| 1998 WX31 | 18 November 1998 | M. W. Buie (695) | 193 | cubewano (cold) | 45.2 | 0.10 | 3 | 40.6 | 49.8 | — | MPC · JPL |
| 1998 WY24 | 18 November 1998 | M. W. Buie (695) | 161 | cubewano (cold) | 43.0 | 0.04 | 2 | 41.4 | 44.5 | — | MPC · JPL |
| 1998 WY31 | 18 November 1998 | M. W. Buie (695) | 185 | cubewano (cold) | 45.0 | 0.12 | 2 | 39.7 | 50.2 | — | MPC · JPL |
| 1998 WZ24 | 18 November 1998 | M. W. Buie (695) | 106 | plutino? | 39.5 | 0.18 | 5 | 32.4 | 46.6 | — | MPC · JPL |
| 1998 WZ31 | 19 November 1998 | M. W. Buie (695) | 106 | plutino | 39.3 | 0.16 | 15 | 32.8 | 45.7 | BR-mag: 1.26; taxonomy: BB-BR | MPC · JPL |
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
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) | 122 | cubewano (cold) | 44.1 | 0.16 | 1 | 36.9 | 51.3 | — | MPC · JPL |
| 2008 AQ118 | 6 January 2008 | P. A. Wiegert (568) | 280 | cubewano (hot) | 41.3 | 0.06 | 25 | 38.9 | 43.7 | — | MPC · JPL |
| 2008 AU138 | 8 January 2008 | Mauna Kea Obs. (568) | 202 | centaur | 32.3 | 0.38 | 43 | 20.1 | 44.5 | — | MPC · JPL |
| 2008 JO41 | 11 May 2008 | Mauna Kea Obs. (568) | 93 | SDO | 89.1 | 0.55 | 49 | 39.9 | 138 | — | MPC · JPL |
| 2008 LD18 | 7 June 2008 | S. S. Sheppard C. Trujillo (568) | 97 | other TNO | 40.2 | 0.30 | 15 | 28.0 | 52.5 | — | MPC · JPL |
| 2008 UA332 | 26 October 2008 | L. H. Wasserman (807) | 280 | res · 1:4 | 76.0 | 0.52 | 31 | 36.8 | 115 | — | MPC · JPL |
| 2008 UB332 | 26 October 2008 | L. H. Wasserman (807) | 185 | plutino? | 39.5 | 0.24 | 33 | 29.9 | 49.1 | — | MPC · JPL |
2009–2016
- 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
2017
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2017 DM121 | 24 February 2017 | Mauna Kea Obs. (568) | 140 | cubewano (hot) | 44.1 | 0.06 | 10 | 41.4 | 46.9 | — | MPC · JPL |
| 2017 DN121 | 24 February 2017 | Mauna Kea Obs. (568) | 147 | twotino | 47.5 | 0.22 | 15 | 36.9 | 58.1 | — | MPC · JPL |
| 2017 DO121 | 24 February 2017 | Mauna Kea Obs. (568) | 134 | centaur? | 183 | 0.85 | 16 | 26.6 | 340 | — | MPC · JPL |
| 2017 DP121 | 24 February 2017 | Mauna Kea Obs. (568) | 154 | SDO | 62.1 | 0.46 | 14 | 33.6 | 90.5 | — | MPC · JPL |
| 2017 FD163 | 25 March 2017 | S. S. Sheppard (807) | 185 | twotino | 47.4 | 0.37 | 13 | 29.9 | 64.9 | — | MPC · JPL |
| 2017 FE173 | 23 March 2017 | Cerro Tololo Obs. (807) | 176 | SDO | 106 | 0.60 | 31 | 42.1 | 169 | — | MPC · JPL |
| 2017 FO161 | 23 March 2017 | Cerro Tololo Obs. (807) | 612 | SDO | 59.8 | 0.43 | 54 | 34.1 | 85.4 | — | MPC · JPL |
| 2017 FP161 | 23 March 2017 | Cerro Tololo Obs. (807) | 168 | other TNO | 48.1 | 0.16 | 15 | 40.5 | 55.8 | — | MPC · JPL |
| 2017 FQ161 | 26 March 2017 | Cerro Tololo Obs. (807) | 255 | twotino | 47.8 | 0.27 | 8 | 35.0 | 60.6 | — | MPC · JPL |
| 2017 OF69 | 26 July 2017 | S. S. Sheppard (568) | 558 | plutino | 39.7 | 0.21 | 14 | 31.5 | 48.0 | — | MPC · JPL |
| 2017 OG69 | 26 July 2017 | S. S. Sheppard (568) | 352 | other TNO | 40.1 | 0.07 | 25 | 37.1 | 43.1 | — | MPC · JPL |
| 2017 OK69 | 26 July 2017 | S. S. Sheppard (568) | 306 | SDO | 50.6 | 0.28 | 24 | 36.3 | 65.0 | — | MPC · JPL |
| 2017 RG16 | 12 September 2017 | Pan-STARRS (F51) | 25 | centaur | 77.8 | 0.91 | 75 | 7.1 | 149 | — | MPC · JPL |
| 2017 SN132 | 16 September 2017 | S. S. Sheppard (568) | 306 | SDO | 96.7 | 0.61 | 24 | 38.1 | 155 | — | MPC · JPL |
| 2017 VO34 | 15 November 2017 | S. S. Sheppard (807) | 154 | SDO | 52.1 | 0.33 | 41 | 35.1 | 69.2 | — | MPC · JPL |
| 2017 WH30 | 17 November 2017 | S. S. Sheppard (807) | 202 | SDO | 83.2 | 0.60 | 18 | 33.2 | 133 | — | MPC · JPL |
| 2017 YG5 | 23 December 2017 | Pan-STARRS (F51) | 15 | centaur | 66.6 | 0.89 | 24 | 7.4 | 126 | — | MPC · JPL |
| 2017 YK3 | 23 December 2017 | Pan-STARRS (F51) | 185 | plutino | 39.2 | 0.28 | 2 | 28.3 | 50.1 | — | MPC · JPL |
2018
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2018 AX18 | 15 January 2018 | S. S. Sheppard (568) | 212 | SDO | 52.0 | 0.29 | 21 | 36.9 | 67.1 | — | MPC · JPL |
| 2018 AY18 | 15 January 2018 | S. S. Sheppard (568) | 147 | SDO | 64.5 | 0.38 | 15 | 39.8 | 89.2 | — | MPC · JPL |
| 2018 AZ18 | 15 January 2018 | S. S. Sheppard (568) | 128 | SDO | 54.6 | 0.28 | 16 | 39.5 | 69.8 | — | MPC · JPL |
| 2018 GT12 | 12 April 2018 | S. S. Sheppard (807) | 134 | SDO | 98.0 | 0.66 | 16 | 33.5 | 162 | — | MPC · JPL |
| 2018 GT15 | 12 April 2018 | Cerro Tololo Obs. (807) | 140 | other TNO | 57.6 | 0.10 | 26 | 51.5 | 63.6 | — | MPC · JPL |
| 2018 JT6 | 10 May 2018 | S. S. Sheppard (807) | 193 | SDO | 53.3 | 0.20 | 27 | 42.7 | 63.8 | — | MPC · JPL |
| 2018 JU6 | 11 May 2018 | S. S. Sheppard (807) | 185 | SDO | 51.8 | 0.26 | 6 | 38.6 | 65.0 | — | MPC · JPL |
| 2018 MF13 | 16 June 2018 | CTIO-DECam (W84) | 81 | res · 5:8 | 41.5 | 0.24 | 3 | 31.3 | 51.6 | — | MPC · JPL |
| 2018 MG13 | 16 June 2018 | CTIO-DECam (W84) | 111 | SDO | 51.1 | 0.25 | 10 | 38.5 | 63.7 | — | MPC · JPL |
| 2018 VG18 | 10 November 2018 | Mauna Kea Obs. (568) | 884 | SDO | 81.4 | 0.54 | 24 | 37.8 | 125 | — | MPC · JPL |
| 2018 VM35 | 6 November 2018 | S. S. Sheppard (568) | 128 | EDDO | 252 | 0.82 | 9 | 45.0 | 460 | ETNO | MPC · JPL |
| 2018 VN35 | 10 November 2018 | S. S. Sheppard (568) | 140 | other TNO | 45.8 | 0.29 | 30 | 32.7 | 59.0 | — | MPC · JPL |
| 2018 VO35 | 10 November 2018 | S. S. Sheppard (568) | 212 | SDO | 128 | 0.74 | 19 | 33.4 | 222 | — | MPC · JPL |
2019
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2019 CY4 | 8 February 2019 | Pan-STARRS (F51) | 28 | centaur | 47.1 | 0.79 | 20 | 10.1 | 84.1 | — | MPC · JPL |
| 2019 GJ23 | 5 April 2019 | Korea Microlensing Telescope Network-CTIO (W93) | 193 | cubewano (cold) | 43.9 | 0.08 | 1 | 40.6 | 47.2 | — | MPC · JPL |
| 2019 QQ8 | 28 August 2019 | Pan-STARRS (F51) | 8 | centaur | 62.2 | 0.89 | 24 | 6.8 | 118 | — | MPC · JPL |
| 2019 RO4 | 4 September 2019 | Lowell Discovery Telescope (G37) | 185 | cubewano (hot) | 41.7 | 0.15 | 20 | 35.3 | 48.0 | — | MPC · JPL |
| 2019 TX7 | 7 October 2019 | Pan-STARRS (F51) | 8 | centaur | 32.8 | 0.80 | 5 | 6.6 | 59.0 | — | MPC · JPL |
| 2019 UH12 | 27 October 2019 | Pan-STARRS 2 (F52) | 34 | centaur | 52.6 | 0.85 | 47 | 7.9 | 97.3 | — | MPC · JPL |
2020
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2020 BA22 | 31 January 2020 | Korea Microlensing Telescope Network-CTIO (W93) | — | — | 55.8 | 0.43 | 2 | 31.7 | 80.0 | not in Johnston's Archive | MPC · JPL |
| 2020 CM3 | 2 February 2020 | Lowell Discovery Telescope (G37) | 212 | SDO | 87.1 | 0.61 | 11 | 33.8 | 140 | — | MPC · JPL |
| 2020 DD5 | 29 February 2020 | Kitt Peak-Bok (V00) | 42 | centaur | 34.6 | 0.48 | 4 | 17.9 | 51.3 | — | MPC · JPL |
| 2020 DH6 | 28 February 2020 | Korea Microlensing Telescope Network-CTIO (W93) | — | — | 52.0 | 0.21 | 1 | 41.1 | 62.9 | not in Johnston's Archive | MPC · JPL |
| 2020 DJ6 | 28 February 2020 | Korea Microlensing Telescope Network-CTIO (W93) | — | — | 73.3 | 0.41 | 0 | 43.3 | 103 | not in Johnston's Archive | MPC · JPL |
| 2020 FP7 | 21 March 2020 | Pan-STARRS (F51) | 29 | centaur? | 52.5 | 0.87 | 50 | 7.0 | 98.1 | — | MPC · JPL |
| 2020 KO11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 44.9 | 0.22 | 7 | 34.9 | 55.0 | not in Johnston's Archive | MPC · JPL |
| 2020 KP11 | 26 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 45.3 | 0.17 | 22 | 37.8 | 52.7 | not in Johnston's Archive | MPC · JPL |
| 2020 KQ11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 44.5 | 0.10 | 3 | 40.2 | 48.9 | not in Johnston's Archive | MPC · JPL |
| 2020 KR11 | 30 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 46.3 | 0.09 | 6 | 42.2 | 50.4 | not in Johnston's Archive | MPC · JPL |
| 2020 KS11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 118 | 0.71 | 3 | 34.7 | 201 | not in Johnston's Archive | MPC · JPL |
| 2020 KT11 | 26 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 43.2 | 0.20 | 27 | 34.5 | 52.0 | not in Johnston's Archive | MPC · JPL |
| 2020 KU11 | 26 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 58.0 | 0.48 | 15 | 30.3 | 85.7 | not in Johnston's Archive | MPC · JPL |
| 2020 KV11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 154 | 0.78 | 5 | 33.6 | 274 | ETNO not in Johnston's Archive | MPC · JPL |
| 2020 KW11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 46.5 | 0.17 | 5 | 38.7 | 54.3 | not in Johnston's Archive | MPC · JPL |
| 2020 KX11 | 29 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 66.0 | 0.02 | 14 | 64.7 | 67.3 | not in Johnston's Archive | MPC · JPL |
| 2020 KY11 | 30 May 2020 | New Horizons KBO Search-Subaru (266) | — | — | 51.1 | 0.02 | 8 | 49.9 | 52.2 | not in Johnston's Archive | MPC · JPL |
| 2020 QK3 | 18 August 2020 | Purple Mountain Obs. XuYi Station (D29) | — | — | 32.4 | 0.58 | 25 | 13.5 | 51.3 | not in Johnston's Archive | MPC · JPL |
Ignored objects
The Minor Planet Center does not include the following 74 objects with a semi-major axis larger than that of Neptune in its respective lists (see § top).[2][3][lower-alpha 1] The data is sourced from the List of Known Trans-Neptunian Objects at Johnston's Archive.[1]
| Designation | D (km) | Orbital description | Remarks | Refs | |||||
|---|---|---|---|---|---|---|---|---|---|
| Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| (65407) 2002 RP120 | 15 | damocloid | 53.714 | 0.954 | 119.10 | 2.456 | 104.972 | albedo: 0.098; BR-mag: 1.37 | MPC · JPL |
| 385571 Otrera | 77 | NT · L4 | 30.135 | 0.027 | 1.43 | 29.326 | 30.943 | — | MPC · JPL |
| 385695 Clete | 97 | NT · L4 | 30.113 | 0.050 | 5.25 | 28.594 | 31.631 | — | MPC · JPL |
| (523794) 2015 RR245 | 770 | res · 2:9 | 81.796 | 0.583 | 7.56 | 34.076 | 129.516 | — | MPC · JPL |
| (530664) 2011 SO277 | 134 | NT · L4 | 30.170 | 0.013 | 9.64 | 29.792 | 30.548 | — | MPC · JPL |
| 1996 PW | 7 | damocloid | 258.364 | 0.990 | 30.05 | 2.485 | 514.242 | — | MPC · JPL |
| 2000 AB229 | 7 | damocloid | 52.660 | 0.956 | 68.27 | 2.315 | 103.005 | — | MPC · JPL |
| 2000 KP65 | 35 | damocloid | 90.187 | 0.963 | 45.63 | 3.332 | 177.042 | — | MPC · JPL |
| 2001 QR322 | 132 | NT · L4 | 30.231 | 0.031 | 1.32 | 29.298 | 31.164 | albedo: 0.058 | MPC · JPL |
| 2002 RN109 | 4 | damocloid | 556.381 | 0.995 | 58.31 | 2.681 | 110.080 | — | MPC · JPL |
| 2003 UY283 | 4 | unusual | 33.454 | 0.895 | 18.90 | 3.506 | 63.401 | — | MPC · JPL |
| 2004 CM111 | 6 | centaur | 33.180 | 0.851 | 4.66 | 4.942 | 61.417 | — | MPC · JPL |
| 2004 NN8 | 4 | damocloid | 99.474 | 0.976 | 165.55 | 2.362 | 196.586 | — | MPC · JPL |
| 2005 OE | 8 | damocloid | 63.049 | 0.952 | 67.51 | 3.036 | 123.062 | — | MPC · JPL |
| 2005 VX3 | 7 | damocloid | 845.614 | 0.995 | 112.26 | 4.100 | 687.129 | — | MPC · JPL |
| 2006 EX52 | 5 | damocloid | 42.296 | 0.940 | 150.17 | 2.555 | 82.037 | — | MPC · JPL |
| 2006 LM1 | 5 | damocloid | 37.184 | 0.900 | 172.14 | 3.711 | 70.656 | — | MPC · JPL |
| 2006 TO130 | 134 | res · 3:4 | 36.382 | 0.151 | 1.05 | 30.903 | 41.861 | — | MPC · JPL |
| 2007 DA61 | 4 | damocloid | 518.395 | 0.995 | 76.72 | 2.656 | 034.135 | — | MPC · JPL |
| 2007 TQ436 | 44 | plutino? | 39.752 | 0.253 | 8.94 | 29.692 | 49.812 | — | MPC · JPL |
| 2008 BN18 | 8 | damocloid | 35.137 | 0.925 | 28.71 | 2.635 | 67.639 | — | MPC · JPL |
| 2008 LC18 | 101 | NT · L5 | 30.145 | 0.077 | 27.47 | 27.830 | 32.461 | — | MPC · JPL |
| 2009 DD47 | 3 | damocloid | 47.587 | 0.953 | 107.45 | 2.220 | 92.954 | — | MPC · JPL |
| 2010 CG55 | 10 | damocloid | 31.843 | 0.910 | 146.19 | 2.865 | 60.822 | albedo: 0.048 | MPC · JPL |
| 2010 GW147 | 16 | centaur | 170.388 | 0.968 | 99.90 | 5.390 | 335.387 | albedo: 0.037 | MPC · JPL |
| 2010 GW64 | 6 | damocloid | 62.981 | 0.941 | 105.21 | 3.709 | 122.253 | albedo: 0.047 | MPC · JPL |
| 2010 JH124 | 7 | damocloid | 69.875 | 0.963 | 53.36 | 2.613 | 137.137 | albedo: 0.052 | MPC · JPL |
| 2011 HM102 | 93 | NT · L5 | 30.335 | 0.085 | 29.31 | 27.742 | 32.929 | BR-mag: 1.13 | MPC · JPL |
| 2011 OR17 | 11 | damocloid | 278.558 | 0.989 | 110.50 | 3.118 | 553.999 | — | MPC · JPL |
| 2011 UU412 | 51 | plutino? | 39.309 | 0.167 | 23.20 | 32.753 | 45.864 | — | MPC · JPL |
| 2011 WS41 | 1.3 | damocloid | 38.310 | 0.946 | 141.64 | 2.082 | 74.538 | — | MPC · JPL |
| 2012 HD2 | 4 | damocloid | 62.993 | 0.959 | 146.83 | 2.555 | 123.431 | — | MPC · JPL |
| 2012 KA51 | 27 | damocloid | 224.399 | 0.978 | 70.66 | 4.910 | 443.888 | — | MPC · JPL |
| 2012 UD185 | 134 | NT · L4 | 30.166 | 0.045 | 28.36 | 28.794 | 31.538 | — | MPC · JPL |
| 2013 BN27 | 1.7 | damocloid | 65.137 | 0.976 | 101.83 | 1.560 | 128.713 | — | MPC · JPL |
| 2013 HS150 | 1.8 | damocloid | 103.381 | 0.973 | 97.40 | 2.829 | 203.933 | — | MPC · JPL |
| 2013 KY18 | 193 | NT · L5 | 30.354 | 0.123 | 6.65 | 26.624 | 34.084 | — | MPC · JPL |
| 2013 LD16 | 3 | damocloid | 81.530 | 0.969 | 154.70 | 2.549 | 160.512 | BR-mag: 1.30 | MPC · JPL |
| 2013 TS187 | 93 | res · 4:5 | 34.971 | 0.102 | 4.60 | 31.408 | 38.534 | — | MPC · JPL |
| 2013 TZ187 | 111 | NT · L4 | 30.113 | 0.067 | 13.15 | 28.092 | 32.135 | — | MPC · JPL |
| 2014 CW14 | 6 | damocloid | 32.168 | 0.866 | 170.76 | 4.304 | 60.033 | BR-mag: 1.38 | MPC · JPL |
| 2014 XS3 | 5 | damocloid | 72.531 | 0.955 | 101.41 | 3.254 | 141.808 | — | MPC · JPL |
| 2015 FK37 | 5 | damocloid | 104.449 | 0.953 | 155.84 | 4.916 | 203.983 | — | MPC · JPL |
| 2015 RK245 | 6 | damocloid | 80.211 | 0.966 | 91.67 | 2.758 | 157.665 | — | MPC · JPL |
| 2015 RL277 | 2 | centaur | 34.780 | 0.851 | 3.12 | 5.190 | 64.371 | — | MPC · JPL |
| 2015 TN178 | 4 | damocloid | 54.253 | 0.956 | 91.12 | 2.387 | 106.120 | — | MPC · JPL |
| 2015 TS350 | 10 | centaur | 142.757 | 0.965 | 58.04 | 5.047 | 280.467 | — | MPC · JPL |
| 2015 XR384 | 3 | damocloid | 36.679 | 0.903 | 157.50 | 3.567 | 69.790 | — | MPC · JPL |
| 2016 AT281 | 4 | damocloid | 63.373 | 0.958 | 22.19 | 2.683 | 124.062 | — | MPC · JPL |
| 2016 CO264 | 3 | damocloid | 48.088 | 0.937 | 129.78 | 3.012 | 93.163 | — | MPC · JPL |
| 2016 EJ203 | 1.1 | damocloid | 67.427 | 0.960 | 170.98 | 2.730 | 132.125 | — | MPC · JPL |
| 2016 PN66 | 9 | damocloid | 31.059 | 0.907 | 105.13 | 2.902 | 59.216 | — | MPC · JPL |
| 2016 US109 | 1.7 | damocloid | 35.863 | 0.948 | 87.18 | 1.856 | 69.870 | — | MPC · JPL |
| 2017 CW32 | 3 | damocloid | 191.911 | 0.985 | 152.43 | 2.954 | 380.868 | — | MPC · JPL |
| 2017 EM4 | 2 | damocloid | 33.289 | 0.921 | 83.42 | 2.646 | 63.931 | — | MPC · JPL |
| 2017 GD8 | 1.4 | damocloid | 43.297 | 0.947 | 74.90 | 2.284 | 84.309 | — | MPC · JPL |
| 2017 JB6 | 4 | damocloid | 32.906 | 0.884 | 160.74 | 3.815 | 61.997 | — | MPC · JPL |
| 2017 MB7 | 6 | damocloid | 3549.257 | 0.999 | 55.71 | 4.447 | 094.067 | — | MPC · JPL |
| 2017 MZ4 | 10 | damocloid | 66.794 | 0.952 | 65.83 | 3.186 | 130.401 | — | MPC · JPL |
| 2017 OX68 | 1.2 | damocloid | 58.963 | 0.971 | 94.76 | 1.734 | 116.193 | — | MPC · JPL |
| 2017 QO33 | 8 | damocloid | 34.394 | 0.857 | 148.82 | 4.935 | 63.854 | — | MPC · JPL |
| 2017 SN33 | 1.2 | damocloid | 260.702 | 0.993 | 152.03 | 1.843 | 519.561 | — | MPC · JPL |
| 2017 UR52 | 0.3 | Amor | 303.935 | 0.996 | 108.23 | 1.243 | 606.628 | — | MPC · JPL |
| 2017 UW51 | 4 | damocloid | 130.264 | 0.976 | 144.18 | 3.137 | 257.390 | — | MPC · JPL |
| 2018 DE4 | 1.6 | damocloid | 32.316 | 0.926 | 81.33 | 2.390 | 62.242 | — | MPC · JPL |
| 2018 DF4 | 3 | damocloid | 97.750 | 0.984 | 68.21 | 1.600 | 193.900 | — | MPC · JPL |
| 2018 KH3 | 8 | damocloid | 94.329 | 0.961 | 46.86 | 3.704 | 184.953 | — | MPC · JPL |
| 2018 MP8 | 4 | damocloid | 361.973 | 0.989 | 68.31 | 3.829 | 720.117 | — | MPC · JPL |
| 2018 SQ13 | 4 | damocloid | 155.419 | 0.981 | 90.97 | 2.970 | 307.869 | — | MPC · JPL |
| 2019 EJ3 | 0.13 | Amor | 86.271 | 0.988 | 139.76 | 1.077 | 171.466 | — | MPC · JPL |
| 2019 YJ6 | 1.8 | damocloid | 37.686 | 0.932 | 22.00 | 2.563 | 72.809 | — | MPC · JPL |
| 2020 KU7 | 4 | damocloid | 34.804 | 0.879 | 103.84 | 4.196 | 65.412 | — | MPC · JPL |
| 2020 ML1 | 1.3 | damocloid | 55.099 | 0.954 | 82.51 | 2.538 | 107.661 | — | MPC · JPL |
See also
Notes
- According to Johnston's Archive,[lower-alpha 2] there are 50+ objects with a semi-major axis larger than 30.1 AU that are excluded from the two MPC sources. These ignored objects are the damocloids and the Neptune trojans, as well as three unusual objects 2003 UY283 (MPC/JPL), 2004 CM111 (MPC/JPL) and 2015 RL277 (MPC/JPL).
References
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
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