List of unnumbered trans-Neptunian objects: 2001
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The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2001. As of October 2025[update], it contains a total of 89 bodies.[1][2][3][4] For more information see the description on the main page. Also see list for the previous and next year.
2001
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2001 DB106 | 28 February 2001 | O. R. Hainaut A. C. Delsanti (809) | 167 | cubewano (cold) | 42.9 | 0.04 | 4 | 41.1 | 44.7 | — | MPC · JPL |
| 2001 DC106 | 28 February 2001 | O. R. Hainaut A. C. Delsanti (809) | 174 | cubewano (cold) | 42.0 | 0.06 | 2 | 39.5 | 44.5 | — | MPC · JPL |
| 2001 DD106 | 28 February 2001 | O. R. Hainaut A. C. Delsanti (809) | 115 | cubewano (cold) | 43.8 | 0.09 | 2 | 39.8 | 47.7 | — | MPC · JPL |
| 2001 DM108 | 22 February 2001 | Mauna Kea Obs. (568) | 119 | cubewano? | 45.4 | 0.00 | 3 | 45.4 | 45.4 | — | MPC · JPL |
| 2001 DN108 | 22 February 2001 | Mauna Kea Obs. (568) | 95 | cubewano? | 45.5 | 0.00 | 8 | 45.5 | 45.5 | — | MPC · JPL |
| 2001 DO108 | 22 February 2001 | Mauna Kea Obs. (568) | 72 | cubewano? | 43.0 | 0.00 | 3 | 43.0 | 43.0 | — | MPC · JPL |
| 2001 DP108 | 22 February 2001 | Mauna Kea Obs. (568) | 47 | plutino? | 39.5 | 0.31 | 1 | 27.4 | 51.6 | — | MPC · JPL |
| 2001 DQ108 | 22 February 2001 | Mauna Kea Obs. (568) | 65 | cubewano? | 45.4 | 0.00 | 3 | 45.4 | 45.4 | — | MPC · JPL |
| 2001 DR106 | 22 February 2001 | Mauna Kea Obs. (568) | 75 | cubewano? | 44.5 | 0.00 | 2 | 44.5 | 44.5 | — | MPC · JPL |
| 2001 DS106 | 22 February 2001 | Mauna Kea Obs. (568) | 75 | cubewano? | 42.6 | 0.00 | 6 | 42.6 | 42.6 | — | MPC · JPL |
| 2001 DS108 | 22 February 2001 | Mauna Kea Obs. (568) | 86 | cubewano? | 45.9 | 0.00 | 3 | 45.9 | 45.9 | — | MPC · JPL |
| 2001 DT108 | 25 February 2001 | Mauna Kea Obs. (568) | 60 | plutino? | 39.5 | 0.19 | 2 | 32.1 | 46.9 | — | MPC · JPL |
| 2001 DU108 | 22 February 2001 | Mauna Kea Obs. (568) | 68 | cubewano? | 45.0 | 0.05 | 3 | 42.8 | 47.2 | — | MPC · JPL |
| 2001 DV108 | 22 February 2001 | D. Kinoshita J. Watanabe T. Fuse (568) | 95 | other TNO | 45.7 | 0.26 | 5 | 33.7 | 57.7 | — | MPC · JPL |
| 2001 ES24 | 1 March 2001 | O. R. Hainaut A. C. Delsanti (809) | 110 | cubewano (cold) | 44.1 | 0.06 | 4 | 41.3 | 46.9 | — | MPC · JPL |
| 2001 FB185 | 27 March 2001 | Kitt Peak Obs. (695) | 29 | cubewano? | 43.2 | 0.09 | 4 | 39.4 | 46.9 | — | MPC · JPL |
| 2001 FC185 | 27 March 2001 | Kitt Peak Obs. (695) | 100 | other TNO | 42.9 | 0.10 | 20 | 38.6 | 47.3 | — | MPC · JPL |
| 2001 FC193 | 27 March 2001 | Kitt Peak Obs. (695) | 65 | cubewano? | 46.5 | 0.00 | 3 | 46.5 | 46.5 | — | MPC · JPL |
| 2001 FD193 | 27 March 2001 | Kitt Peak Obs. (695) | 82 | cubewano? | 44.8 | 0.00 | 13 | 44.8 | 44.8 | — | MPC · JPL |
| 2001 FF193 | 27 March 2001 | Kitt Peak Obs. (695) | 99 | cubewano? | 44.7 | 0.00 | 2 | 44.7 | 44.7 | — | MPC · JPL |
| 2001 FJ193 | 27 March 2001 | Kitt Peak Obs. (695) | 65 | plutino? | 39.3 | 0.08 | 1 | 36.2 | 42.5 | — | MPC · JPL |
| 2001 FJ194 | 22 March 2001 | Kitt Peak Obs. (695) | 114 | SDO | 66.0 | 0.44 | 10 | 37.0 | 95.0 | — | MPC · JPL |
| 2001 FK194 | 22 March 2001 | Kitt Peak Obs. (695) | 92 | centaur | 76.3 | 0.63 | 9 | 28.0 | 125 | — | MPC · JPL |
| 2001 FL185 | 26 March 2001 | M. W. Buie (695) | 126 | cubewano (cold) | 43.9 | 0.07 | 4 | 40.8 | 46.9 | binary: 88 km | MPC · JPL |
| 2001 FM194 | 22 March 2001 | Kitt Peak Obs. (695) | 119 | SDO | 54.0 | 0.36 | 29 | 34.3 | 73.6 | BR-mag: 1.19; taxonomy: BR | MPC · JPL |
| 2001 FN194 | 22 March 2001 | Kitt Peak Obs. (695) | 83 | SDO | 67.0 | 0.48 | 7 | 35.0 | 98.9 | — | MPC · JPL |
| 2001 FS185 | 26 March 2001 | Kitt Peak Obs. (695) | 99 | cubewano? | 43.3 | 0.04 | 5 | 41.4 | 45.1 | — | MPC · JPL |
| 2001 FT185 | 26 March 2001 | M. W. Buie (695) | 109 | other TNO | 47.1 | 0.11 | 20 | 42.1 | 52.1 | — | MPC · JPL |
| 2001 FU172 | 22 March 2001 | B. Gladman (695) | 99 | plutino | 39.4 | 0.27 | 25 | 28.9 | 49.8 | BR-mag: 3.57 | MPC · JPL |
| 2001 HA59 | 26 April 2001 | O. R. Hainaut A. C. Delsanti (809) | 167 | cubewano (cold) | 43.9 | 0.06 | 1 | 41.2 | 46.5 | — | MPC · JPL |
| 2001 KA77 | 24 May 2001 | M. W. Buie (807) | 634 | cubewano (hot) | 47.6 | 0.10 | 12 | 43.0 | 52.3 | albedo: 0.025; BR-mag: 1.82; taxonomy: RR | MPC · JPL |
| 2001 KE77 | 24 May 2001 | M. W. Buie (807) | 151 | other TNO | 45.7 | 0.18 | 21 | 37.3 | 54.0 | — | MPC · JPL |
| 2001 KF76 | 22 May 2001 | M. W. Buie (807) | 121 | cubewano (cold) | 44.6 | 0.03 | 3 | 43.3 | 45.9 | — | MPC · JPL |
| 2001 KG76 | 22 May 2001 | M. W. Buie (807) | 208 | res · 4:9 | 51.6 | 0.34 | 2 | 34.2 | 69.0 | BR-mag: 1.92 | MPC · JPL |
| 2001 KG77 | 23 May 2001 | M. W. Buie (807) | 91 | SDO | 62.3 | 0.46 | 16 | 34.0 | 90.7 | BR-mag: 1.24 | MPC · JPL |
| 2001 KH76 | 22 May 2001 | M. W. Buie (807) | 145 | cubewano (cold) | 46.4 | 0.13 | 3 | 40.4 | 52.4 | — | MPC · JPL |
| 2001 KL76 | 22 May 2001 | M. W. Buie (807) | 173 | res · 5:9 | 44.6 | 0.10 | 1 | 40.3 | 49.0 | — | MPC · JPL |
| 2001 KM76 | 22 May 2001 | Cerro Tololo Obs. (807) | 130 | cubewano? | 44.9 | 0.07 | 1 | 41.5 | 48.2 | — | MPC · JPL |
| 2001 KO77 | 23 May 2001 | M. W. Buie (807) | 109 | other TNO | 44.1 | 0.15 | 21 | 37.5 | 50.7 | — | MPC · JPL |
| 2001 KQ76 | 24 May 2001 | M. W. Buie (807) | 282 | cubewano (hot) | 42.8 | 0.10 | 6 | 38.5 | 47.2 | — | MPC · JPL |
| 2001 KS76 | 24 May 2001 | Cerro Tololo Obs. (807) | 109 | cubewano? | 43.6 | 0.09 | 3 | 39.6 | 47.7 | — | MPC · JPL |
| 2001 KW76 | 22 May 2001 | M. W. Buie (807) | 126 | other TNO | 46.3 | 0.22 | 11 | 36.0 | 56.6 | — | MPC · JPL |
| 2001 KY76 | 22 May 2001 | M. W. Buie (807) | 285 | plutino | 39.6 | 0.24 | 4 | 30.1 | 49.2 | BR-mag: 1.84 | MPC · JPL |
| 2001 KZ76 | 24 May 2001 | Cerro Tololo Obs. (807) | 104 | SDO | 79.0 | 0.52 | 26 | 38.2 | 120 | — | MPC · JPL |
| 2001 OG109 | 27 July 2001 | R. L. Allen G. Bernstein R. Malhotra (568) | 80 | cubewano (cold) | 43.9 | 0.02 | 1 | 42.9 | 44.8 | — | MPC · JPL |
| 2001 OJ108 | 24 July 2001 | Mauna Kea Obs. (568) | 95 | cubewano? | 44.9 | 0.09 | 9 | 40.8 | 49.0 | — | MPC · JPL |
| 2001 OK108 | 24 July 2001 | B. Gladman (568) | 108 | cubewano (cold) | 43.3 | 0.04 | 2 | 41.8 | 44.8 | — | MPC · JPL |
| 2001 OL108 | 24 July 2001 | Mauna Kea Obs. (568) | 72 | cubewano? | 45.6 | 0.11 | 3 | 40.7 | 50.5 | — | MPC · JPL |
| 2001 OM108 | 25 July 2001 | Mauna Kea Obs. (568) | 86 | cubewano? | 46.1 | 0.04 | 12 | 44.3 | 47.8 | — | MPC · JPL |
| 2001 OM109 | 26 July 2001 | J.-M. Petit J. J. Kavelaars M. J. Holman B. Gladman (568) | 99 | SDO | 69.3 | 0.50 | 4 | 35.0 | 104 | — | MPC · JPL |
| 2001 ON108 | 25 July 2001 | B. Gladman (568) | 104 | cubewano? | 43.0 | 0.03 | 1 | 41.7 | 44.4 | — | MPC · JPL |
| 2001 OO108 | 27 July 2001 | B. Gladman (568) | 99 | SDO | 51.6 | 0.33 | 1 | 34.8 | 68.3 | — | MPC · JPL |
| 2001 OQ108 | 24 July 2001 | B. Gladman (568) | 167 | cubewano (cold) | 45.5 | 0.01 | 2 | 45.1 | 45.9 | — | MPC · JPL |
| 2001 OR108 | 24 July 2001 | Mauna Kea Obs. (568) | 90 | cubewano? | 45.7 | 0.10 | 3 | 41.2 | 50.1 | — | MPC · JPL |
| 2001 OS108 | 25 July 2001 | Mauna Kea Obs. (568) | 150 | cubewano? | 46.5 | 0.00 | 2 | 46.5 | 46.5 | — | MPC · JPL |
| 2001 OT108 | 25 July 2001 | Mauna Kea Obs. (568) | 55 | SDO | 67.0 | 0.52 | 1 | 32.4 | 101 | — | MPC · JPL |
| 2001 OU108 | 27 July 2001 | Mauna Kea Obs. (568) | 209 | other TNO | 46.8 | 0.00 | 28 | 46.8 | 46.8 | — | MPC · JPL |
| 2001 OY108 | 24 July 2001 | Mauna Kea Obs. (568) | 114 | cubewano? | 46.1 | 0.10 | 7 | 41.5 | 50.6 | — | MPC · JPL |
| 2001 OZ108 | 24 July 2001 | B. Gladman (568) | 73 | cubewano (cold) | 43.7 | 0.05 | 2 | 41.5 | 45.8 | — | MPC · JPL |
| 2001 PK47 | 12 August 2001 | C. Veillet (568) | 176 | cubewano (hot) | 40.0 | 0.07 | 9 | 37.2 | 42.8 | — | MPC · JPL |
| 2001 QA298 | 19 August 2001 | M. W. Buie (807) | 126 | other TNO | 46.7 | 0.20 | 24 | 37.5 | 55.9 | — | MPC · JPL |
| 2001 QQ297 | 19 August 2001 | M. W. Buie (807) | 132 | cubewano (cold) | 44.7 | 0.09 | 4 | 40.9 | 48.5 | — | MPC · JPL |
| 2001 QS297 | 20 August 2001 | Cerro Tololo Obs. (807) | 285 | cubewano? | 43.8 | 0.00 | 5 | 43.8 | 43.8 | — | MPC · JPL |
| 2001 QU297 | 20 August 2001 | Cerro Tololo Obs. (807) | 217 | cubewano? | 43.7 | 0.00 | 3 | 43.7 | 43.7 | — | MPC · JPL |
| 2001 QV297 | 20 August 2001 | Cerro Tololo Obs. (807) | 189 | cubewano? | 44.0 | 0.00 | 2 | 44.0 | 44.0 | — | MPC · JPL |
| 2001 QW322 | 24 August 2001 | 68 Mauna Kea | 128 | cubewano (cold) | 44.4 | 0.02 | 5 | 43.5 | 45.2 | albedo: 0.093; binary: 126 km | MPC · JPL |
| 2001 QX297 | 20 August 2001 | M. W. Buie (807) | 183 | cubewano (cold) | 44.5 | 0.03 | 1 | 43.0 | 46.0 | — | MPC · JPL |
| 2001 QZ297 | 19 August 2001 | M. W. Buie (807) | 139 | cubewano (cold) | 44.7 | 0.07 | 2 | 41.6 | 47.8 | — | MPC · JPL |
| 2001 RL155 | 12 September 2001 | Kitt Peak Obs. (695) | 95 | cubewano? | 44.2 | 0.12 | 1 | 38.7 | 49.7 | — | MPC · JPL |
| 2001 RW143 | 12 September 2001 | M. W. Buie (695) | 132 | cubewano (cold) | 43.2 | 0.04 | 3 | 41.6 | 44.9 | — | MPC · JPL |
| 2001 RY143 | 12 September 2001 | M. W. Buie (695) | 137 | cubewano? | 42.3 | 0.15 | 7 | 35.9 | 48.7 | — | MPC · JPL |
| 2001 SD291 | 18 September 2001 | Palomar Obs. (675) | 76 | cubewano (cold) | 45.8 | 0.09 | 3 | 41.6 | 50.0 | — | MPC · JPL |
| 2001 SE291 | 18 September 2001 | P. Nicholson C. Dumas A. W. Harris B. Gladman (675) | 121 | cubewano (cold) | 45.7 | 0.14 | 2 | 39.4 | 51.9 | — | MPC · JPL |
| 2001 UA17 | 17 October 2001 | La Silla Obs. (809) | 164 | cubewano? | 42.9 | 0.07 | 6 | 39.9 | 45.9 | — | MPC · JPL |
| 2001 UB17 | 17 October 2001 | La Silla Obs. (809) | 119 | plutino? | 39.6 | 0.07 | 5 | 37.0 | 42.3 | — | MPC · JPL |
| 2001 UC17 | 17 October 2001 | La Silla Obs. (809) | 143 | plutino? | 39.6 | 0.14 | 3 | 33.8 | 45.4 | — | MPC · JPL |
| 2001 UN18 | 19 October 2001 | M. W. Buie (695) | 167 | cubewano (cold) | 44.4 | 0.07 | 4 | 41.3 | 47.6 | — | MPC · JPL |
| 2001 UP18 | 19 October 2001 | M. W. Buie (695) | 228 | twotino | 48.0 | 0.07 | 1 | 44.4 | 51.5 | BR-mag: 1.49; taxonomy: IR | MPC · JPL |
| 2001 VN71 | 9 November 2001 | B. Gladman J. J. Kavelaars (568) | 72 | plutino | 39.3 | 0.24 | 19 | 29.7 | 49.0 | — | MPC · JPL |
| 2001 XB255 | 9 December 2001 | S. S. Sheppard D. C. Jewitt J. Kleyna (568) | 150 | cubewano? | 74.9 | 0.45 | 2 | 41.3 | 108 | — | MPC · JPL |
| 2001 XC255 | 9 December 2001 | Mauna Kea Obs. (568) | 114 | cubewano? | 43.8 | 0.05 | 2 | 41.7 | 45.9 | — | MPC · JPL |
| 2001 XE255 | 9 December 2001 | Mauna Kea Obs. (568) | 90 | cubewano? | 43.5 | 0.00 | 10 | 43.5 | 43.5 | — | MPC · JPL |
| 2001 XF255 | 9 December 2001 | Mauna Kea Obs. (568) | 99 | cubewano? | 44.0 | 0.00 | 1 | 44.0 | 44.0 | — | MPC · JPL |
| 2001 XG255 | 9 December 2001 | Mauna Kea Obs. (568) | 75 | cubewano? | 43.9 | 0.07 | 2 | 41.0 | 46.9 | — | MPC · JPL |
| 2001 XJ255 | 11 December 2001 | Mauna Kea Obs. (568) | 75 | cubewano? | 44.4 | 0.07 | 10 | 41.1 | 47.8 | — | MPC · JPL |
| 2001 XU254 | 9 December 2001 | S. S. Sheppard J. Kleyna D. C. Jewitt (568) | 237 | cubewano (hot) | 43.2 | 0.07 | 7 | 40.0 | 46.4 | — | MPC · JPL |
| 2001 XV254 | 9 December 2001 | Mauna Kea Obs. (568) | 137 | cubewano? | 45.7 | 0.00 | 6 | 45.7 | 45.7 | — | MPC · JPL |
| 2001 XW254 | 10 December 2001 | Mauna Kea Obs. (568) | 99 | cubewano? | 42.3 | 0.00 | 6 | 42.3 | 42.3 | — | MPC · JPL |
| 2001 XX254 | 11 December 2001 | J. Kleyna D. C. Jewitt S. S. Sheppard (568) | 114 | cubewano (cold) | 43.5 | 0.02 | 2 | 42.5 | 44.6 | — | MPC · JPL |
