# List of unnumbered trans-Neptunian objects: 2003

The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2003. As of April 2022, it contains a total of 118 bodies. For more information see the description on the main page. Also see list for the previous and next year.

## 2003

| Designation | First Observed (discovered) | First Observed (discovered) | D (km) | Orbital description | Orbital description | Orbital description | Orbital description | Orbital description | Orbital description | Remarks | Refs |
| Designation | Date | Observer (Site) | D (km) | Class | a (AU) | e | i (°) | q (AU) | Q (AU) | Remarks | Refs |
| 2003 BF$_{91}$ | 27 January 2003 | Hubble Space Telescope (250) | 16 | cubewano? | 42.7 | 0.01 | 2 | 42.1 | 43.4 | — | MPC · JPL |
| 2003 BG$_{91}$ | 27 January 2003 | Hubble Space Telescope (250) | 25 | cubewano? | 43.4 | 0.10 | 3 | 39.1 | 47.8 | — | MPC · JPL |
| 2003 BH$_{91}$ | 27 January 2003 | Hubble Space Telescope (250) | 14 | cubewano? | 44.0 | 0.03 | 2 | 42.6 | 45.4 | — | MPC · JPL |
| 2003 FA$_{130}$ | 24 March 2003 | Mauna Kea Obs. (568) | 121 | cubewano (cold) | 42.5 | 0.03 | 0 | 41.2 | 43.8 | — | MPC · JPL |
| 2003 FB$_{130}$ | 24 March 2003 | Mauna Kea Obs. (568) | 132 | other TNO | 43.0 | 0.11 | 24 | 38.2 | 47.8 | — | MPC · JPL |
| 2003 FD$_{128}$ | 31 March 2003 | M. W. Buie (695) | 178 | cubewano (hot) | 38.1 | 0.02 | 5 | 37.4 | 38.9 | — | MPC · JPL |
| 2003 FH$_{127}$ | 30 March 2003 | Kitt Peak Obs. (695) | 167 | cubewano (cold) | 44.8 | 0.08 | 0 | 41.1 | 48.5 | — | MPC · JPL |
| 2003 FH$_{129}$ | 30 March 2003 | M. W. Buie (695) | 122 | centaur | 70.1 | 0.61 | 19 | 27.6 | 113 | — | MPC · JPL |
| 2003 FJ$_{127}$ | 30 March 2003 | M. W. Buie (695) | 132 | other TNO | 44.7 | 0.26 | 23 | 33.1 | 56.3 | — | MPC · JPL |
| 2003 FL$_{127}$ | 31 March 2003 | M. W. Buie (695) | 260 | plutino | 39.1 | 0.24 | 4 | 29.7 | 48.5 | — | MPC · JPL |
| 2003 FM$_{127}$ | 31 March 2003 | M. W. Buie (695) | 126 | cubewano (cold) | 43.7 | 0.06 | 4 | 41.2 | 46.2 | — | MPC · JPL |
| 2003 FM$_{129}$ | 31 March 2003 | DLS (807) | 198 | SDO | 50.7 | 0.28 | 18 | 36.5 | 64.8 | — | MPC · JPL |
| 2003 FZ$_{129}$ | 24 March 2003 | Mauna Kea Obs. (568) | 125 | SDO | 61.6 | 0.38 | 6 | 38.1 | 85.1 | BR-mag: 1.32; taxonomy: BR | MPC · JPL |
| 2003 GF$_{55}$ | 1 April 2003 | M. W. Buie (695) | 246 | cubewano (hot) | 45.4 | 0.05 | 6 | 43.1 | 47.8 | — | MPC · JPL |
| 2003 GM$_{53}$ | 1 April 2003 | Kitt Peak Obs. (695) | 143 | cubewano? | 44.5 | 0.05 | 7 | 42.2 | 46.7 | — | MPC · JPL |
| 2003 HA$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 113 | plutino | 39.4 | 0.17 | 28 | 32.7 | 46.1 | — | MPC · JPL |
| 2003 HF$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 90 | plutino | 39.3 | 0.19 | 1 | 31.8 | 46.8 | — | MPC · JPL |
| 2003 HH$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 110 | cubewano (cold) | 43.9 | 0.08 | 1 | 40.3 | 47.6 | — | MPC · JPL |
| 2003 HJ$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 103 | plutino? | 39.7 | 0.25 | 22 | 29.8 | 49.6 | — | MPC · JPL |
| 2003 HK$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 86 | cubewano? | 43.4 | 0.07 | 6 | 40.2 | 46.7 | — | MPC · JPL |
| 2003 HL$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 189 | cubewano? | 79.3 | 0.65 | 6 | 27.8 | 131 | — | MPC · JPL |
| 2003 HM$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 116 | centaur | 42.7 | 0.68 | 11 | 13.5 | 71.8 | — | MPC · JPL |
| 2003 HN$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 109 | cubewano? | 44.4 | 0.07 | 2 | 41.5 | 47.4 | — | MPC · JPL |
| 2003 HO$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 83 | cubewano (cold) | 46.2 | 0.15 | 4 | 39.1 | 53.3 | — | MPC · JPL |
| 2003 HP$_{57}$ | 26 April 2003 | Mauna Kea Obs. (568) | 218 | other TNO | 46.7 | 0.19 | 38 | 37.9 | 55.4 | — | MPC · JPL |
| 2003 HX$_{56}$ | 26 April 2003 | Mauna Kea Obs. (568) | 158 | other TNO | 47.0 | 0.22 | 30 | 36.6 | 57.5 | BR-mag: 1.01 | MPC · JPL |
| 2003 HZ$_{56}$ | 26 April 2003 | Mauna Kea Obs. (568) | 105 | cubewano (cold) | 43.5 | 0.00 | 3 | 43.5 | 43.5 | — | MPC · JPL |
| 2003 KO$_{20}$ | 30 May 2003 | M. W. Buie (807) | 159 | cubewano (cold) | 43.9 | 0.04 | 2 | 41.9 | 45.9 | — | MPC · JPL |
| 2003 KP$_{20}$ | 30 May 2003 | Cerro Tololo Obs. (807) | 125 | cubewano? | 44.8 | 0.12 | 2 | 39.5 | 50.2 | — | MPC · JPL |
| 2003 LA7 | 1 June 2003 | M. W. Buie (807) | 181 | res · 1:4 | 77.1 | 0.53 | 6 | 35.9 | 118 | — | MPC · JPL |
| 2003 LC$_7$ | 1 June 2003 | Cerro Tololo Obs. (807) | 197 | cubewano? | 45.1 | 0.12 | 5 | 39.9 | 50.4 | — | MPC · JPL |
| 2003 LD$_7$ | 1 June 2003 | Cerro Tololo Obs. (807) | 143 | cubewano? | 42.9 | 0.04 | 2 | 41.1 | 44.7 | — | MPC · JPL |
| 2003 LD$_9$ | 1 June 2003 | M. W. Buie K. J. Meech (807) | 182 | other TNO | 47.4 | 0.17 | 7 | 39.3 | 55.5 | — | MPC · JPL |
| 2003 LE$_7$ | 1 June 2003 | Cerro Tololo Obs. (807) | 143 | plutino? | 39.3 | 0.21 | 19 | 31.2 | 47.4 | — | MPC · JPL |
| 2003 LF$_7$ | 1 June 2003 | Cerro Tololo Obs. (807) | 124 | plutino? | 39.5 | 0.13 | 3 | 34.5 | 44.5 | — | MPC · JPL |
| 2003 LZ$_6$ | 1 June 2003 | Cerro Tololo Obs. (807) | 172 | cubewano? | 43.5 | 0.00 | 7 | 43.5 | 43.5 | — | MPC · JPL |
| 2003 MM$_{13}$ | 25 June 2003 | Mauna Kea Obs. (568) | 297 | centaur | 36.2 | 0.44 | 2 | 20.1 | 52.2 | — | MPC · JPL |
| 2003 OS$_{33}$ | 31 July 2003 | Mauna Kea Obs. (568) | 119 | SDO | 70.0 | 0.52 | 21 | 33.3 | 107 | — | MPC · JPL |
| 2003 QB$_{112}$ | 26 August 2003 | M. W. Buie (807) | 186 | cubewano (hot) | 44.4 | 0.11 | 11 | 39.3 | 49.4 | — | MPC · JPL |
| 2003 QC$_{91}$ | 25 August 2003 | Cerro Tololo Obs. (807) | 137 | cubewano? | 43.5 | 0.00 | 3 | 43.5 | 43.5 | — | MPC · JPL |
| 2003 QD$_{91}$ | 23 August 2003 | M. W. Buie (807) | 115 | cubewano (cold) | 43.6 | 0.04 | 2 | 41.9 | 45.3 | — | MPC · JPL |
| 2003 QE$_{91}$ | 23 August 2003 | M. W. Buie (807) | 114 | cubewano (cold) | 43.3 | 0.05 | 4 | 41.0 | 45.6 | — | MPC · JPL |
| 2003 QE$_{112}$ | 26 August 2003 | M. W. Buie (807) | 170 | cubewano (cold) | 43.4 | 0.04 | 4 | 41.8 | 45.0 | — | MPC · JPL |
| 2003 QF$_{91}$ | 23 August 2003 | M. W. Buie (807) | 111 | cubewano (cold) | 43.3 | 0.04 | 2 | 41.6 | 45.0 | — | MPC · JPL |
| 2003 QG$_{91}$ | 24 August 2003 | M. W. Buie (807) | 112 | cubewano (cold) | 42.9 | 0.02 | 2 | 41.8 | 43.9 | — | MPC · JPL |
| 2003 QJ$_{91}$ | 24 August 2003 | M. W. Buie (807) | 144 | cubewano (cold) | 44.6 | 0.04 | 3 | 42.8 | 46.5 | — | MPC · JPL |
| 2003 QL$_{91}$ | 25 August 2003 | M. W. Buie (807) | 132 | cubewano (cold) | 43.4 | 0.02 | 2 | 42.6 | 44.1 | — | MPC · JPL |
| 2003 QM$_{91}$ | 25 August 2003 | M. W. Buie (807) | 167 | cubewano (cold) | 43.5 | 0.05 | 3 | 41.2 | 45.7 | — | MPC · JPL |
| 2003 QM$_{112}$ | 29 August 2003 | Mauna Kea Obs. (568) | 8 | centaur | 83.4 | 0.84 | 16 | 13.2 | 154 | — | MPC · JPL |
| 2003 QN$_{91}$ | 23 August 2003 | M. W. Buie (807) | 115 | cubewano (cold) | 42.9 | 0.12 | 4 | 38.0 | 47.9 | — | MPC · JPL |
| 2003 QO$_{112}$ | 29 August 2003 | Mauna Kea Obs. (568) | 23 | centaur | 33.3 | 0.50 | 7 | 16.5 | 50.1 | — | MPC · JPL |
| 2003 QP$_{91}$ | 23 August 2003 | M. W. Buie (807) | 120 | res · 3:4 | 36.7 | 0.10 | 7 | 33.1 | 40.3 | — | MPC · JPL |
| 2003 QS$_{91}$ | 25 August 2003 | M. W. Buie (807) | 96 | cubewano (cold) | 46.6 | 0.15 | 4 | 39.6 | 53.6 | — | MPC · JPL |
| 2003 QT$_{90}$ | 23 August 2003 | M. W. Buie (807) | 145 | cubewano (cold) | 44.2 | 0.05 | 2 | 41.8 | 46.6 | — | MPC · JPL |
| 2003 QU$_{90}$ | 23 August 2003 | Cerro Tololo Obs. (807) | 121 | cubewano (cold) | 43.4 | 0.01 | 2 | 43.0 | 43.7 | — | MPC · JPL |
| 2003 QU$_{91}$ | 25 August 2003 | Cerro Tololo Obs. (807) | 138 | other TNO | 43.6 | 0.14 | 26 | 37.6 | 49.7 | — | MPC · JPL |
| 2003 QV$_{91}$ | 23 August 2003 | Cerro Tololo Obs. (807) | 150 | plutino? | 39.5 | 0.35 | 33 | 25.7 | 53.3 | — | MPC · JPL |
| 2003 QW$_{91}$ | 23 August 2003 | Cerro Tololo Obs. (807) | 72 | plutino? | 39.5 | 0.27 | 5 | 28.7 | 50.2 | — | MPC · JPL |
| 2003 QX$_{90}$ | 24 August 2003 | M. W. Buie (807) | 145 | cubewano (cold) | 44.1 | 0.01 | 3 | 43.5 | 44.8 | — | MPC · JPL |
| 2003 QX$_{91}$ | 23 August 2003 | M. W. Buie (807) | 74 | res · 4:7 | 44.0 | 0.26 | 28 | 32.8 | 55.3 | — | MPC · JPL |
| 2003 QY$_{90}$ | 24 August 2003 | M. W. Buie (807) | 81 | cubewano (cold) | 43.1 | 0.04 | 4 | 41.2 | 45.0 | albedo: 0.310; binary: 80 km | MPC · JPL |
| 2003 QY$_{91}$ | 23 August 2003 | Cerro Tololo Obs. (807) | 109 | SDO | 82.5 | 0.61 | 26 | 32.0 | 133 | — | MPC · JPL |
| 2003 QY$_{113}$ | 31 August 2003 | Mauna Kea Obs. (568) | 157 | cubewano? | 45.3 | 0.03 | 3 | 43.9 | 46.8 | — | MPC · JPL |
| 2003 QZ$_{90}$ | 24 August 2003 | Cerro Tololo Obs. (807) | 157 | cubewano? | 43.6 | 0.00 | 6 | 43.6 | 43.6 | — | MPC · JPL |
| 2003 SO$_{317}$ | 25 September 2003 | Mauna Kea Obs. (568) | 112 | plutino | 39.6 | 0.28 | 7 | 28.6 | 50.6 | — | MPC · JPL |
| 2003 SS422 | 28 September 2003 | Cerro Tololo Obs. (807) | 137 | SDO | 199 | 0.80 | 17 | 39.6 | 359 | ETNO | MPC · JPL |
| 2003 TJ$_{58}$ | 3 October 2003 | Mauna Kea Obs. (568) | 65 | cubewano (cold) | 44.3 | 0.09 | 1 | 40.5 | 48.2 | albedo: 0.285; binary: 51 km | MPC · JPL |
| 2003 TK$_{58}$ | 3 October 2003 | Mauna Kea Obs. (568) | 145 | cubewano (cold) | 43.0 | 0.07 | 3 | 40.2 | 45.9 | — | MPC · JPL |
| 2003 TL$_{58}$ | 3 October 2003 | Mauna Kea Obs. (568) | 204 | cubewano (hot) | 43.4 | 0.04 | 8 | 41.6 | 45.3 | — | MPC · JPL |
| 2003 UA$_{292}$ | 22 October 2003 | Kitt Peak Obs. (695) | 207 | cubewano? | 46.8 | 0.15 | 11 | 39.8 | 53.8 | — | MPC · JPL |
| 2003 UA$_{414}$ | 18 October 2003 | NEAT (644) | 357 | res · 2:9 | 83.3 | 0.56 | 22 | 36.6 | 130 | — | MPC · JPL |
| 2003 UB$_{292}$ | 23 October 2003 | M. W. Buie (695) | 277 | other TNO | 47.2 | 0.05 | 19 | 44.8 | 49.7 | — | MPC · JPL |
| 2003 UC$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 143 | cubewano? | 45.1 | 0.09 | 4 | 41.2 | 49.1 | — | MPC · JPL |
| 2003 UC$_{414}$ | 30 October 2003 | Cerro Tololo Obs. (807) | 122 | centaur | 44.9 | 0.64 | 26 | 16.3 | 73.5 | — | MPC · JPL |
| 2003 UD$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 164 | cubewano? | 46.0 | 0.11 | 8 | 40.9 | 51.1 | — | MPC · JPL |
| 2003 UE$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 190 | other TNO | 43.5 | 0.14 | 19 | 37.6 | 49.3 | — | MPC · JPL |
| 2003 UF$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 144 | other TNO | 44.8 | 0.13 | 31 | 39.1 | 50.5 | — | MPC · JPL |
| 2003 UG$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 204 | cubewano (hot) | 43.4 | 0.10 | 7 | 39.1 | 47.7 | — | MPC · JPL |
| 2003 UH$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 99 | cubewano? | 43.9 | 0.07 | 7 | 41.0 | 46.9 | — | MPC · JPL |
| 2003 UK$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 125 | cubewano? | 43.2 | 0.11 | 13 | 38.5 | 47.9 | — | MPC · JPL |
| 2003 UK$_{293}$ | 23 October 2003 | M. W. Buie (695) | 110 | cubewano (cold) | 42.5 | 0.07 | 3 | 39.4 | 45.6 | — | MPC · JPL |
| 2003 UL$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 119 | cubewano? | 44.9 | 0.07 | 4 | 41.5 | 48.3 | — | MPC · JPL |
| 2003 UM$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 166 | other TNO | 46.1 | 0.19 | 18 | 37.4 | 54.7 | — | MPC · JPL |
| 2003 UN$_{292}$ | 24 October 2003 | M. W. Buie (695) | 105 | cubewano (cold) | 44.9 | 0.11 | 1 | 40.1 | 49.8 | — | MPC · JPL |
| 2003 UO$_{292}$ | 22 October 2003 | Kitt Peak Obs. (695) | 157 | plutino? | 39.4 | 0.19 | 5 | 32.0 | 46.8 | — | MPC · JPL |
| 2003 UP$_{292}$ | 23 October 2003 | M. W. Buie (695) | 126 | twotino | 47.8 | 0.42 | 13 | 27.9 | 67.8 | — | MPC · JPL |
| 2003 UQ$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 188 | plutino? | 39.5 | 0.12 | 3 | 34.6 | 44.4 | — | MPC · JPL |
| 2003 US$_{291}$ | 22 October 2003 | Kitt Peak Obs. (695) | 158 | other TNO | 44.9 | 0.00 | 24 | 44.9 | 44.9 | — | MPC · JPL |
| 2003 UT$_{291}$ | 22 October 2003 | M. W. Buie (695) | 174 | cubewano (cold) | 42.9 | 0.06 | 2 | 40.2 | 45.5 | — | MPC · JPL |
| 2003 UU$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 108 | plutino? | 39.5 | 0.13 | 17 | 34.3 | 44.7 | — | MPC · JPL |
| 2003 UV$_{291}$ | 23 October 2003 | M. W. Buie (695) | 115 | cubewano (cold) | 43.8 | 0.04 | 2 | 42.2 | 45.3 | — | MPC · JPL |
| 2003 UV$_{292}$ | 24 October 2003 | M. W. Buie (695) | 157 | plutino | 39.4 | 0.22 | 11 | 30.8 | 47.9 | — | MPC · JPL |
| 2003 UW$_{291}$ | 23 October 2003 | Kitt Peak Obs. (695) | 189 | cubewano? | 44.6 | 0.00 | 12 | 44.6 | 44.6 | — | MPC · JPL |
| 2003 UX$_{291}$ | 23 October 2003 | Kitt Peak Obs. (695) | 137 | cubewano? | 46.5 | 0.00 | 11 | 46.5 | 46.5 | — | MPC · JPL |
| 2003 UX$_{292}$ | 23 October 2003 | Kitt Peak Obs. (695) | 164 | cubewano? | 44.1 | 0.12 | 11 | 38.6 | 49.5 | — | MPC · JPL |
| 2003 UY$_{291}$ | 24 October 2003 | M. W. Buie (695) | 120 | cubewano (cold) | 49.3 | 0.17 | 4 | 41.1 | 57.4 | BR-mag: 1.39; taxonomy: BB | MPC · JPL |
| 2003 UZ$_{291}$ | 22 October 2003 | M. W. Buie (695) | 196 | cubewano (hot) | 45.1 | 0.13 | 5 | 39.3 | 51.0 | — | MPC · JPL |
| 2003 UZ$_{292}$ | 24 October 2003 | Kitt Peak Obs. (695) | 120 | other TNO | 43.1 | 0.14 | 22 | 37.2 | 49.1 | — | MPC · JPL |
| 2003 WA$_{191}$ | 23 November 2003 | M. W. Buie (695) | 104 | plutino | 39.3 | 0.24 | 5 | 30.0 | 48.5 | — | MPC · JPL |
| 2003 WN$_{193}$ | 17 November 2003 | Cerro Tololo Obs. (807) | 94 | plutino | 39.4 | 0.25 | 22 | 29.4 | 49.4 | — | MPC · JPL |
| 2003 WO$_{193}$ | 29 November 2003 | Cerro Tololo Obs. (807) | 108 | plutino | 39.7 | 0.25 | 7 | 29.8 | 49.5 | — | MPC · JPL |
| 2003 WQ$_{188}$ | 20 November 2003 | Kitt Peak Obs. (695) | 227 | cubewano? | 46.3 | 0.00 | 6 | 46.3 | 46.3 | — | MPC · JPL |
| 2003 WS$_{184}$ | 20 November 2003 | Kitt Peak Obs. (695) | 114 | cubewano? | 44.0 | 0.05 | 3 | 41.8 | 46.2 | — | MPC · JPL |
| 2003 WS$_{188}$ | 20 November 2003 | Kitt Peak Obs. (695) | 75 | plutino? | 39.3 | 0.24 | 6 | 30.0 | 48.7 | — | MPC · JPL |
| 2003 WV$_{188}$ | 20 November 2003 | Kitt Peak Obs. (695) | 130 | cubewano? | 45.9 | 0.00 | 8 | 45.9 | 45.9 | — | MPC · JPL |
| 2003 WW$_{188}$ | 21 November 2003 | Kitt Peak Obs. (695) | 114 | cubewano? | 44.3 | 0.08 | 5 | 40.9 | 47.6 | — | MPC · JPL |
| 2003 YJ$_{179}$ | 16 December 2003 | Mauna Kea Obs. (568) | 126 | cubewano (cold) | 43.6 | 0.08 | 1 | 40.2 | 47.0 | — | MPC · JPL |
| 2003 YK$_{179}$ | 16 December 2003 | Mauna Kea Obs. (568) | 132 | other TNO | 41.6 | 0.14 | 20 | 35.7 | 47.4 | — | MPC · JPL |
| 2003 YM$_{179}$ | 16 December 2003 | Mauna Kea Obs. (568) | 105 | other TNO | 40.9 | 0.06 | 23 | 38.4 | 43.4 | — | MPC · JPL |
| 2003 YN$_{179}$ | 16 December 2003 | Mauna Kea Obs. (568) | 145 | cubewano (cold) | 44.2 | 0.01 | 3 | 43.8 | 44.5 | — | MPC · JPL |
| 2003 YP$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 113 | cubewano (cold) | 43.8 | 0.08 | 1 | 40.3 | 47.3 | — | MPC · JPL |
| 2003 YR$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 195 | cubewano (hot) | 43.2 | 0.05 | 10 | 41.1 | 45.2 | — | MPC · JPL |
| 2003 YS$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 109 | cubewano (cold) | 43.3 | 0.02 | 4 | 42.4 | 44.3 | binary: 95 km | MPC · JPL |
| 2003 YT$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 126 | cubewano (cold) | 43.3 | 0.03 | 2 | 42.1 | 44.6 | — | MPC · JPL |
| 2003 YV$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 166 | other TNO | 46.7 | 0.21 | 16 | 36.7 | 56.6 | — | MPC · JPL |
| 2003 YX$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 132 | cubewano (cold) | 43.3 | 0.04 | 5 | 41.7 | 45.0 | — | MPC · JPL |
| 2003 YY$_{179}$ | 16 December 2003 | Mauna Kea Obs. (568) | 72 | plutino? | 39.6 | 0.16 | 11 | 33.4 | 45.7 | — | MPC · JPL |
| 2003 YZ$_{179}$ | 24 December 2003 | Mauna Kea Obs. (568) | 104 | cubewano? | 43.2 | 0.12 | 13 | 38.2 | 48.1 | — | MPC · JPL |