The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2001. As of May 2026[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
edit| 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) | 153 | cubewano (cold) | 43.1 | 0.04 | 4 | 41.5 | 44.7 | albedo: 0.152 | MPC · JPL |
| 2001 DC106 | 28 February 2001 | O. R. Hainaut, A. C. Delsanti (809) | 172 | cubewano (cold) | 42.2 | 0.06 | 2 | 39.5 | 44.9 | albedo: 0.152 | MPC · JPL |
| 2001 DD106 | 28 February 2001 | O. R. Hainaut, A. C. Delsanti (809) | 96 | cubewano (cold) | 44.0 | 0.10 | 2 | 39.8 | 48.2 | albedo: 0.152 | MPC · JPL |
| 2001 DM108 | 22 February 2001 | Maunakea (568) | 118 | cubewano (cold)? | 45.4 | 0.00 | 3 | 45.4 | 45.4 | albedo: 0.152 | MPC · JPL |
| 2001 DN108 | 22 February 2001 | Maunakea (568) | 130 | cubewano (hot)? | 45.5 | 0.00 | 8 | 45.5 | 45.5 | albedo: 0.079 | MPC · JPL |
| 2001 DO108 | 22 February 2001 | Maunakea (568) | 71 | cubewano (cold)? | 43.0 | 0.00 | 3 | 43.0 | 43.0 | albedo: 0.152 | MPC · JPL |
| 2001 DP108 | 22 February 2001 | Maunakea (568) | 49 | plutino? | 39.5 | 0.31 | 1 | 27.4 | 51.6 | albedo: 0.074 | MPC · JPL |
| 2001 DQ108 | 22 February 2001 | Maunakea (568) | 65 | cubewano (cold)? | 45.4 | 0.00 | 3 | 45.4 | 45.4 | albedo: 0.152 | MPC · JPL |
| 2001 DR106 | 22 February 2001 | Maunakea (568) | 75 | cubewano (cold)? | 44.5 | 0.00 | 2 | 44.5 | 44.5 | albedo: 0.152 | MPC · JPL |
| 2001 DS106 | 22 February 2001 | D. Kinoshita, J. Watanabe, T. Fuse (568) | 101 | cubewano (hot)? | 43.6 | 0.12 | 6 | 38.4 | 48.8 | albedo: 0.079 | MPC · JPL |
| 2001 DS108 | 22 February 2001 | Maunakea (568) | 86 | cubewano (cold)? | 45.9 | 0.00 | 3 | 45.9 | 45.9 | albedo: 0.152 | MPC · JPL |
| 2001 DT108 | 25 February 2001 | Maunakea (568) | 62 | plutino? | 39.5 | 0.19 | 2 | 32.1 | 46.9 | albedo: 0.074 | MPC · JPL |
| 2001 DU108 | 22 February 2001 | Maunakea (568) | 68 | cubewano (cold)? | 45.0 | 0.05 | 3 | 42.8 | 47.2 | albedo: 0.152 | MPC · JPL |
| 2001 DV108 | 22 February 2001 | D. Kinoshita, J. Watanabe, T. Fuse (568) | 84 | other TNO | 45.9 | 0.26 | 5 | 33.8 | 58.0 | albedo: 0.13 | MPC · JPL |
| 2001 ES24 | 1 March 2001 | O. R. Hainaut, A. C. Delsanti (809) | 119 | cubewano (cold) | 44.3 | 0.06 | 4 | 41.7 | 46.9 | albedo: 0.152 | MPC · JPL |
| 2001 FB185 | 27 March 2001 | Kitt Peak (695) | 28 | cubewano (cold)? | 43.2 | 0.09 | 4 | 39.4 | 46.9 | albedo: 0.152 | MPC · JPL |
| 2001 FC185 | 27 March 2001 | Kitt Peak (695) | 113 | cubewano (hot)? | 42.9 | 0.10 | 20 | 38.6 | 47.3 | albedo: 0.079 | MPC · JPL |
| 2001 FC193 | 27 March 2001 | Kitt Peak (695) | 65 | cubewano (cold)? | 46.5 | 0.00 | 3 | 46.5 | 46.5 | albedo: 0.152 | MPC · JPL |
| 2001 FD193 | 27 March 2001 | Kitt Peak (695) | 113 | cubewano (hot)? | 44.8 | 0.00 | 13 | 44.8 | 44.8 | albedo: 0.079 | MPC · JPL |
| 2001 FF193 | 27 March 2001 | Kitt Peak (695) | 98 | cubewano (cold)? | 44.7 | 0.00 | 2 | 44.7 | 44.7 | albedo: 0.152 | MPC · JPL |
| 2001 FJ193 | 27 March 2001 | Kitt Peak (695) | 67 | plutino? | 39.3 | 0.08 | 1 | 36.2 | 42.5 | albedo: 0.074 | MPC · JPL |
| 2001 FJ194 | 22 March 2001 | Kitt Peak (695) | 157 | cubewano (hot)? | 44.1 | 0.14 | 12 | 38.0 | 50.2 | albedo: 0.079 | MPC · JPL |
| 2001 FK194 | 22 March 2001 | Kitt Peak (695) | 92 | centaur | 76.3 | 0.63 | 9 | 28.0 | 124.6 | albedo: 0.058 | MPC · JPL |
| 2001 FL185 | 26 March 2001 | M. W. Buie (695) | 130 | cubewano (cold) | 44.1 | 0.08 | 4 | 40.7 | 47.5 | binary: 68 km; albedo: 0.152 | MPC · JPL |
| 2001 FM194 | 22 March 2001 | Kitt Peak (695) | 125 | SDO | 53.8 | 0.36 | 29 | 34.3 | 73.3 | albedo: 0.124; BRmag: 1.19; taxonomy: BR | MPC · JPL |
| 2001 FN194 | 22 March 2001 | Kitt Peak (695) | 91 | other TNO | 33.9 | 0.10 | 10 | 30.5 | 37.3 | albedo: 0.13 | MPC · JPL |
| 2001 FS185 | 26 March 2001 | Kitt Peak (695) | 98 | cubewano (cold)? | 43.3 | 0.04 | 5 | 41.4 | 45.1 | albedo: 0.152 | MPC · JPL |
| 2001 FT185 | 26 March 2001 | M. W. Buie (695) | 124 | cubewano (hot)? | 47.1 | 0.11 | 20 | 41.9 | 52.3 | albedo: 0.079 | MPC · JPL |
| 2001 FU172 | 22 March 2001 | B. Gladman (695) | 102 | plutino | 39.2 | 0.27 | 25 | 28.7 | 49.7 | albedo: 0.074; BRmag: 3.57 | MPC · JPL |
| 2001 HA59 | 26 April 2001 | O. R. Hainaut, A. C. Delsanti (809) | 160 | cubewano (cold) | 43.7 | 0.07 | 1 | 40.8 | 46.6 | albedo: 0.152 | MPC · JPL |
| 2001 KA77 | 24 May 2001 | M. W. Buie (807) | 634 | cubewano (hot) | 47.2 | 0.09 | 12 | 42.8 | 51.6 | albedo: 0.025; BRmag: 1.72; taxonomy: RR | MPC · JPL |
| 2001 KE77 | 24 May 2001 | M. W. Buie (807) | 172 | cubewano (hot)? | 45.2 | 0.18 | 21 | 37.0 | 53.5 | albedo: 0.079 | MPC · JPL |
| 2001 KF76 | 22 May 2001 | M. W. Buie (807) | 124 | cubewano (cold) | 44.2 | 0.02 | 3 | 43.1 | 45.2 | albedo: 0.152 | MPC · JPL |
| 2001 KG76 | 22 May 2001 | M. W. Buie (807) | 215 | res · 4:9 | 51.3 | 0.34 | 2 | 33.8 | 68.8 | albedo: 0.126; BRmag: 1.92 | MPC · JPL |
| 2001 KG77 | 23 May 2001 | M. W. Buie (807) | 91 | SDO | 61.3 | 0.45 | 16 | 33.9 | 88.6 | albedo: 0.124; BRmag: 1.24 | MPC · JPL |
| 2001 KH76 | 22 May 2001 | M. W. Buie (807) | 149 | cubewano (cold) | 45.9 | 0.12 | 3 | 40.4 | 51.5 | albedo: 0.152 | MPC · JPL |
| 2001 KL76 | 22 May 2001 | M. W. Buie (807) | 179 | res · 5:9 | 44.3 | 0.10 | 1 | 39.9 | 48.7 | albedo: 0.126 | MPC · JPL |
| 2001 KM76 | 22 May 2001 | Cerro Tololo Observatory, La Serena (807) | 130 | cubewano (cold)? | 44.9 | 0.08 | 1 | 41.5 | 48.2 | albedo: 0.152 | MPC · JPL |
| 2001 KO77 | 23 May 2001 | M. W. Buie (807) | 147 | cubewano (hot)? | 43.7 | 0.14 | 21 | 37.5 | 49.9 | albedo: 0.079 | MPC · JPL |
| 2001 KQ76 | 24 May 2001 | M. W. Buie (807) | 260 | cubewano (hot) | 42.6 | 0.10 | 6 | 38.6 | 46.6 | albedo: 0.079 | MPC · JPL |
| 2001 KS76 | 24 May 2001 | Cerro Tololo Observatory, La Serena (807) | 108 | cubewano (cold)? | 43.6 | 0.09 | 3 | 39.6 | 47.7 | albedo: 0.152 | MPC · JPL |
| 2001 KW76 | 22 May 2001 | M. W. Buie (807) | 143 | cubewano (hot)? | 45.8 | 0.21 | 11 | 36.0 | 55.5 | albedo: 0.079 | MPC · JPL |
| 2001 KY76 | 22 May 2001 | M. W. Buie (807) | 272 | plutino | 39.2 | 0.23 | 4 | 30.0 | 48.3 | albedo: 0.074; BRmag: 1.84 | MPC · JPL |
| 2001 KZ76 | 24 May 2001 | Cerro Tololo Observatory, La Serena (807) | 104 | SDO | 79.0 | 0.52 | 26 | 38.2 | 119.8 | albedo: 0.124 | MPC · JPL |
| 2001 OG109 | 27 July 2001 | R. L. Allen, G. Bernstein, R. Malhotra (568) | 82 | cubewano (cold) | 43.5 | 0.01 | 1 | 42.9 | 44.1 | albedo: 0.152 | MPC · JPL |
| 2001 OJ108 | 24 July 2001 | Maunakea (568) | 130 | cubewano (hot)? | 44.9 | 0.09 | 9 | 40.8 | 49.0 | albedo: 0.079 | MPC · JPL |
| 2001 OK108 | 24 July 2001 | B. Gladman (568) | 110 | cubewano (cold) | 42.9 | 0.03 | 2 | 41.5 | 44.3 | albedo: 0.152 | MPC · JPL |
| 2001 OL108 | 24 July 2001 | B. Gladman (568) | 71 | cubewano (cold)? | 45.3 | 0.10 | 3 | 40.8 | 49.8 | albedo: 0.152 | MPC · JPL |
| 2001 OM108 | 25 July 2001 | Maunakea (568) | 119 | cubewano (hot)? | 46.1 | 0.04 | 12 | 44.3 | 47.8 | albedo: 0.079 | MPC · JPL |
| 2001 OM109 | 26 July 2001 | J.-M. Petit, J. J. Kavelaars, M. J. Holman, B. Gladman (568) | 99 | SDO | 68.2 | 0.49 | 4 | 34.7 | 101.7 | albedo: 0.124 | MPC · JPL |
| 2001 ON108 | 25 July 2001 | B. Gladman (568) | 96 | cubewano (cold) | 42.7 | 0.04 | 1 | 41.0 | 44.4 | albedo: 0.152 | MPC · JPL |
| 2001 OO108 | 27 July 2001 | B. Gladman (568) | 99 | SDO | 51.0 | 0.32 | 1 | 34.6 | 67.3 | albedo: 0.124 | MPC · JPL |
| 2001 OQ108 | 24 July 2001 | B. Gladman (568) | 159 | cubewano (cold) | 45.3 | 0.01 | 2 | 44.7 | 46.0 | albedo: 0.152 | MPC · JPL |
| 2001 OR108 | 24 July 2001 | Maunakea (568) | 90 | cubewano (cold)? | 45.7 | 0.10 | 3 | 41.2 | 50.1 | albedo: 0.152 | MPC · JPL |
| 2001 OS108 | 25 July 2001 | Maunakea (568) | 149 | cubewano (cold)? | 46.5 | 0.00 | 2 | 46.5 | 46.5 | albedo: 0.152 | MPC · JPL |
| 2001 OT108 | 25 July 2001 | Maunakea (568) | 55 | SDO | 67.0 | 0.52 | 1 | 32.4 | 101.5 | albedo: 0.124 | MPC · JPL |
| 2001 OU108 | 27 July 2001 | Maunakea (568) | 237 | cubewano (hot)? | 46.8 | 0.00 | 28 | 46.8 | 46.8 | albedo: 0.079 | MPC · JPL |
| 2001 OY108 | 24 July 2001 | Maunakea (568) | 157 | cubewano (hot)? | 46.1 | 0.10 | 7 | 41.5 | 50.6 | albedo: 0.079 | MPC · JPL |
| 2001 OZ108 | 24 July 2001 | B. Gladman (568) | 75 | cubewano (cold) | 43.3 | 0.05 | 2 | 41.0 | 45.6 | albedo: 0.152 | MPC · JPL |
| 2001 PK47 | 12 August 2001 | C. Veillet (568) | 162 | cubewano (hot) | 40.0 | 0.07 | 9 | 37.2 | 42.9 | albedo: 0.079 | MPC · JPL |
| 2001 QA298 | 19 August 2001 | M. W. Buie (807) | 160 | cubewano (hot)? | 46.3 | 0.19 | 24 | 37.5 | 55.0 | albedo: 0.079 | MPC · JPL |
| 2001 QQ297 | 19 August 2001 | M. W. Buie (807) | 143 | cubewano (cold) | 44.5 | 0.08 | 4 | 41.0 | 48.1 | albedo: 0.152 | MPC · JPL |
| 2001 QS297 | 20 August 2001 | M. W. Buie (807) | 393 | cubewano (hot)? | 39.4 | 0.13 | 6 | 34.2 | 44.6 | albedo: 0.079 | MPC · JPL |
| 2001 QU297 | 20 August 2001 | Cerro Tololo Observatory, La Serena (807) | 215 | cubewano (cold)? | 43.7 | 0.00 | 3 | 43.7 | 43.7 | albedo: 0.152 | MPC · JPL |
| 2001 QV297 | 20 August 2001 | Cerro Tololo Observatory, La Serena (807) | 187 | cubewano (cold)? | 44.0 | 0.00 | 2 | 44.0 | 44.0 | albedo: 0.152 | MPC · JPL |
| 2001 QW322 | 24 a0August 2001 | Maunakea (568) | 128 | cubewano (cold) | 44.0 | 0.02 | 5 | 42.9 | 45.0 | binary: 126 km; albedo: 0.093 | MPC · JPL |
| 2001 QX297 | 20 August 2001 | M. W. Buie (807) | 186 | cubewano (cold) | 44.2 | 0.03 | 1 | 42.9 | 45.5 | albedo: 0.152 | MPC · JPL |
| 2001 QZ297 | 19 August 2001 | M. W. Buie (807) | 150 | cubewano (cold) | 44.3 | 0.06 | 2 | 41.5 | 47.0 | albedo: 0.152 | MPC · JPL |
| 2001 RL155 | 12 September 2001 | Kitt Peak (695) | 94 | cubewano (cold)? | 44.2 | 0.12 | 1 | 38.7 | 49.7 | albedo: 0.152 | MPC · JPL |
| 2001 RW143 | 12 September 2001 | M. W. Buie (695) | 136 | cubewano (cold) | 43.3 | 0.04 | 3 | 41.7 | 44.9 | albedo: 0.152 | MPC · JPL |
| 2001 RY143 | 12 September 2001 | M. W. Buie (695) | 183 | cubewano (hot)? | 42.3 | 0.15 | 7 | 35.9 | 48.6 | albedo: 0.079 | MPC · JPL |
| 2001 SD291 | 18 September 2001 | Palomar Mountain (675) | 78 | cubewano (cold) | 45.8 | 0.09 | 3 | 41.6 | 50.0 | albedo: 0.152 | MPC · JPL |
| 2001 SE291 | 18 September 2001 | P. Nicholson, C. Dumas, A. W. Harris, B. Gladman (675) | 124 | cubewano (cold) | 45.7 | 0.14 | 2 | 39.4 | 52.0 | albedo: 0.152 | MPC · JPL |
| 2001 UA17 | 17 October 2001 | O. R. Hainaut, D. Kinoshita (809) | 182 | cubewano (hot)? | 43.3 | 0.10 | 5 | 39.0 | 47.7 | albedo: 0.079 | MPC · JPL |
| 2001 UB17 | 17 October 2001 | European Southern Observatory, La Silla (809) | 123 | plutino? | 39.6 | 0.07 | 5 | 37.0 | 42.3 | albedo: 0.074 | MPC · JPL |
| 2001 UC17 | 17 October 2001 | European Southern Observatory, La Silla (809) | 148 | plutino? | 39.6 | 0.15 | 3 | 33.8 | 45.4 | albedo: 0.074 | MPC · JPL |
| 2001 UN18 | 19 October 2001 | M. W. Buie (695) | 171 | cubewano (cold) | 44.5 | 0.07 | 4 | 41.4 | 47.5 | albedo: 0.152 | MPC · JPL |
| 2001 UP18 | 19 October 2001 | M. W. Buie (695) | 238 | twotino | 48.0 | 0.07 | 1 | 44.5 | 51.4 | albedo: 0.126; BRmag: 1.49; taxonomy: IR | MPC · JPL |
| 2001 VN71 | 9 November 2001 | B. Gladman, J. J. Kavelaars (568) | 91 | plutino | 39.8 | 0.25 | 19 | 29.8 | 49.8 | albedo: 0.074 | MPC · JPL |
| 2001 XB255 | 9 December 2001 | S. S. Sheppard, D. C. Jewitt, J. Kleyna (568) | 173 | SDO | 76.5 | 0.46 | 2 | 41.3 | 111.7 | albedo: 0.124 | MPC · JPL |
| 2001 XC255 | 9 December 2001 | Maunakea (568) | 113 | cubewano (cold)? | 43.8 | 0.05 | 2 | 41.7 | 45.9 | albedo: 0.152 | MPC · JPL |
| 2001 XE255 | 9 December 2001 | Maunakea (568) | 124 | cubewano (hot)? | 43.5 | 0.00 | 10 | 43.5 | 43.5 | albedo: 0.079 | MPC · JPL |
| 2001 XF255 | 9 December 2001 | Maunakea (568) | 98 | cubewano (cold)? | 44.0 | 0.00 | 1 | 44.0 | 44.0 | albedo: 0.152 | MPC · JPL |
| 2001 XG255 | 9 December 2001 | Maunakea (568) | 75 | cubewano (cold)? | 43.9 | 0.07 | 2 | 41.0 | 46.9 | albedo: 0.152 | MPC · JPL |
| 2001 XJ255 | 11 December 2001 | J. Kleyna, S. S. Sheppard, D. C. Jewitt (568) | 114 | other TNO | 37.7 | 0.11 | 11 | 33.4 | 41.9 | albedo: 0.13 | MPC · JPL |
| 2001 XU254 | 9 December 2001 | S. S. Sheppard, J. Kleyna, D. C. Jewitt (568) | 217 | cubewano (hot) | 43.7 | 0.08 | 7 | 40.2 | 47.2 | albedo: 0.079 | MPC · JPL |
| 2001 XV254 | 9 December 2001 | Maunakea (568) | 188 | cubewano (hot)? | 45.7 | 0.00 | 6 | 45.7 | 45.7 | albedo: 0.079 | MPC · JPL |
| 2001 XW254 | 10 December 2001 | Maunakea (568) | 136 | cubewano (hot)? | 42.3 | 0.00 | 6 | 42.3 | 42.3 | albedo: 0.079 | MPC · JPL |
| 2001 XX254 | 11 December 2001 | J. Kleyna, D. C. Jewitt, S. S. Sheppard (568) | 115 | cubewano (cold) | 44.0 | 0.03 | 2 | 42.7 | 45.3 | albedo: 0.152 | MPC · JPL |
References
edit- ↑ "List Of Transneptunian Objects". Minor Planet Center. 16 April 2022. Retrieved 16 April 2022.
- ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 16 April 2022. Retrieved 16 April 2022.
- ↑ "MPC Database Search: a ≥ 30.1 AU". Minor Planet Center. Archived from the original on 2 October 2025. Retrieved 2 October 2025.
5542 trans-Neptunian objects
- ↑ "List of Known Trans-Neptunian Objects". Johnston's Archive. 2 January 2022. Retrieved 16 April 2022.