List of unnumbered trans-Neptunian objects: 2021
The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2021. As of November 2026[update], it contains a total of 200 bodies. For more information see the description on the main page. Also see list for the previous and next year.
2021
| Designation | First Observed (discovered) | D (km) | Orbital description | Remarks | Refs | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Observer (Site) |
Class | a (AU) |
e | i (°) |
q (AU) |
Q (AU) | ||||
| 2021 AN28 | 12 January 2021 | Maunakea (568) | 40 | cubewano (cold)? | 34.0 | 0.10 | 2 | 30.6 | 37.5 | albedo: 0.152 | |
| 2021 BK15 | 18 January 2021 | Las Campanas Observatory (304) | 126 | res · 2:5 | 55.6 | 0.38 | 12 | 34.7 | 76.4 | albedo: 0.126 | |
| 2021 CG56 | 15 February 2021 | Maunakea (568) | 131 | SDO | 57.1 | 0.35 | 13 | 37.4 | 76.8 | albedo: 0.124 | |
| 2021 CJ46 | 15 February 2021 | Maunakea (568) | 265 | cubewano (cold) | 44.2 | 0.04 | 3 | 42.4 | 45.9 | albedo: 0.152 | |
| 2021 CK46 | 15 February 2021 | Maunakea (568) | 266 | res · 2:7 | 70.1 | 0.49 | 23 | 36.0 | 104.2 | albedo: 0.126 | |
| 2021 CL46 | 15 February 2021 | Maunakea (568) | 169 | SDO | 56.9 | 0.40 | 9 | 34.1 | 79.7 | albedo: 0.124 | |
| 2021 CP40 | 15 February 2021 | Maunakea (568) | 150 | other TNO | 55.5 | 0.16 | 38 | 46.7 | 64.4 | albedo: 0.13 | |
| 2021 CP5 | 7 February 2021 | Pan-STARRS 1 (F51) | 20 | centaur | 414.8 | 0.98 | 9 | 10.6 | 819.0 | albedo: 0.058 | |
| 2021 DF26 | 17 February 2021 | Subaru Telescope, Maunakea (T09) | 78 | cubewano (cold)? | 43.2 | 0.13 | 3 | 37.8 | 48.6 | albedo: 0.152 | |
| 2021 DG17 | 17 February 2021 | Maunakea (568) | 372 | SDO | 62.4 | 0.23 | 30 | 48.2 | 76.6 | albedo: 0.124 | |
| 2021 DG26 | 17 February 2021 | Subaru Telescope, Maunakea (T09) | 133 | other TNO | 52.6 | 0.11 | 18 | 46.6 | 58.5 | albedo: 0.13 | |
| 2021 DH17 | 17 February 2021 | Maunakea (568) | 233 | cubewano (hot) | 46.1 | 0.13 | 11 | 40.0 | 52.3 | albedo: 0.079 | |
| 2021 DJ17 | 17 February 2021 | Maunakea (568) | 167 | res · 2:5? | 55.3 | 0.25 | 25 | 41.5 | 69.2 | albedo: 0.126 | |
| 2021 DK18 | 17 February 2021 | Maunakea (568) | 169 | EDDO | 861.0 | 0.95 | 15 | 44.6 | 1677.3 | albedo: 0.124 | |
| 2021 DL1 | 17 February 2021 | Mt. Lemmon Survey (G96) | 9 | damocloid | 34.5 | 0.89 | 149 | 3.9 | 65.0 | albedo: 0.048 | |
| 2021 DM15 | 17 February 2021 | Maunakea (568) | 115 | cubewano (cold) | 45.9 | 0.04 | 2 | 43.9 | 47.9 | binary: 72 km; albedo: 0.152 | |
| 2021 DM19 | 16 February 2021 | Maunakea (568) | 113 | SDO | 83.7 | 0.55 | 28 | 37.4 | 129.9 | albedo: 0.124 | |
| 2021 DN15 | 17 February 2021 | Maunakea (568) | 154 | cubewano (cold) | 44.3 | 0.06 | 3 | 41.8 | 46.9 | binary: 106 km; albedo: 0.152 | |
| 2021 DN19 | 17 February 2021 | Maunakea (568) | 172 | cubewano (cold)? | 47.2 | 0.11 | 3 | 41.9 | 52.6 | albedo: 0.152 | |
| 2021 DO15 | 16 February 2021 | Maunakea (568) | 191 | other TNO | 51.1 | 0.16 | 23 | 42.7 | 59.4 | albedo: 0.13 | |
| 2021 DP15 | 16 February 2021 | Maunakea (568) | 253 | SDO | 61.5 | 0.40 | 4 | 37.1 | 85.9 | albedo: 0.124 | |
| 2021 DQ15 | 16 February 2021 | Maunakea (568) | 217 | res · 2:5 | 55.6 | 0.41 | 3 | 32.7 | 78.5 | albedo: 0.126 | |
| 2021 DR15 | 17 February 2021 | Maunakea (568) | 716 | SDO | 67.7 | 0.43 | 30 | 38.7 | 96.8 | albedo: 0.124 | |
| 2021 DS15 | 17 February 2021 | Maunakea (568) | 216 | cubewano (cold) | 43.7 | 0.05 | 3 | 41.6 | 45.9 | binary: 138 km; albedo: 0.152 | |
| 2021 EE44 | 5 March 2021 | Lowell Discovery Telescope (G37) | 277 | centaur | 42.8 | 0.34 | 8 | 28.3 | 57.3 | albedo: 0.058 | |
| 2021 FQ54 | 17 March 2021 | Las Campanas Observatory (304) | 97 | SDO | 67.9 | 0.44 | 18 | 37.9 | 98.0 | albedo: 0.124 | |
| 2021 GQ57 | 9 April 2021 | Pan-STARRS 1 (F51) | 3 | damocloid | 84.0 | 0.96 | 125 | 3.4 | 164.5 | albedo: 0.048 | |
| 2021 GU122 | 5 April 2021 | Korea Microlensing Telescope Network-CTIO (W93) | 122 | SDO | 60.9 | 0.33 | 12 | 40.9 | 80.9 | albedo: 0.124 | |
| 2021 GW122 | 12 April 2021 | Korea Microlensing Telescope Network-CTIO (W93) | 100 | cubewano (cold) | 42.5 | 0.03 | 1 | 41.2 | 43.8 | albedo: 0.152 | |
| 2021 HA46 | — | — | — | — | 47.5 | 0.25 | 17 | 35.6 | 59.3 | — | |
| 2021 LA44 | 9 June 2021 | New Horizons KBO Search (266) | 157 | plutino | 39.3 | 0.20 | 5 | 31.4 | 47.1 | albedo: 0.074 | |
| 2021 LA45 | 9 June 2021 | New Horizons KBO Search (266) | 83 | cubewano (cold)? | 42.3 | 0.03 | 2 | 41.2 | 43.5 | albedo: 0.152 | |
| 2021 LA57 | — | — | — | — | 60.3 | 0.44 | 20 | 33.9 | 86.7 | — | |
| 2021 LA58 | 3 June 2021 | Canada-France-Hawaii Telescope, Maunakea (T14) | — | — | 87.7 | 0.36 | 38 | 56.5 | 118.8 | — | |
| 2021 LA59 | — | — | — | — | 45.8 | 0.07 | 19 | 42.6 | 49.1 | — | |
| 2021 LB44 | 9 June 2021 | New Horizons KBO Search (266) | 61 | cubewano (cold)? | 42.0 | 0.11 | 3 | 37.4 | 46.7 | albedo: 0.152 | |
| 2021 LB45 | 9 June 2021 | New Horizons KBO Search (266) | 31 | twotino | 47.5 | 0.23 | 9 | 36.3 | 58.6 | albedo: 0.126 | |
| 2021 LB57 | — | — | — | — | 39.3 | 0.31 | 23 | 27.1 | 51.6 | — | |
| 2021 LB58 | — | — | — | — | 42.9 | 0.14 | 20 | 37.0 | 48.8 | — | |
| 2021 LB59 | — | — | — | — | 55.3 | 0.34 | 42 | 36.4 | 74.2 | — | |
| 2021 LC44 | 9 June 2021 | New Horizons KBO Search (266) | 66 | cubewano (cold)? | 46.2 | 0.13 | 2 | 40.2 | 52.2 | albedo: 0.152 | |
| 2021 LC57 | — | — | — | — | 49.0 | 0.28 | 34 | 35.2 | 62.8 | — | |
| 2021 LC58 | — | — | — | — | 41.4 | 0.13 | 20 | 36.2 | 46.6 | — | |
| 2021 LC59 | — | — | — | — | 47.5 | 0.27 | 18 | 34.7 | 60.3 | — | |
| 2021 LD44 | 9 June 2021 | New Horizons KBO Search (266) | 111 | plutino | 39.2 | 0.30 | 2 | 27.3 | 51.1 | albedo: 0.074 | |
| 2021 LD56 | 13 June 2021 | Cerro Tololo-DECam (W84) | — | — | 40.2 | 0.04 | 15 | 38.8 | 41.7 | — | |
| 2021 LD57 | — | — | — | — | 59.7 | 0.38 | 19 | 37.2 | 82.2 | — | |
| 2021 LD58 | — | — | — | — | 47.2 | 0.17 | 26 | 39.3 | 55.1 | — | |
| 2021 LD59 | — | — | — | — | 45.5 | 0.15 | 32 | 38.8 | 52.2 | — | |
| 2021 LE44 | 9 June 2021 | New Horizons KBO Search (266) | 71 | cubewano (cold)? | 44.0 | 0.08 | 3 | 40.5 | 47.6 | albedo: 0.152 | |
| 2021 LE57 | — | — | — | — | 39.2 | 0.27 | 17 | 28.5 | 49.9 | — | |
| 2021 LE58 | — | — | — | — | 43.1 | 0.15 | 22 | 36.6 | 49.7 | — | |
| 2021 LE59 | — | — | — | — | 55.1 | 0.43 | 19 | 31.7 | 78.5 | — | |
| 2021 LF44 | 9 June 2021 | New Horizons KBO Search (266) | 48 | cubewano (hot)? | 41.4 | 0.10 | 18 | 37.3 | 45.6 | albedo: 0.079 | |
| 2021 LF57 | — | — | — | — | 90.0 | 0.60 | 24 | 35.7 | 144.3 | — | |
| 2021 LF58 | — | — | — | — | 54.8 | 0.16 | 30 | 45.8 | 63.8 | — | |
| 2021 LF59 | — | — | — | — | 66.5 | 0.42 | 34 | 38.7 | 94.3 | — | |
| 2021 LG44 | 9 June 2021 | New Horizons KBO Search (266) | 37 | cubewano (cold)? | 43.5 | 0.05 | 1 | 41.3 | 45.7 | albedo: 0.152 | |
| 2021 LG57 | — | — | — | — | 38.7 | 0.09 | 23 | 35.1 | 42.3 | — | |
| 2021 LG58 | — | — | — | — | 41.7 | 0.07 | 20 | 38.7 | 44.7 | — | |
| 2021 LG59 | — | — | — | — | 43.0 | 0.07 | 21 | 39.9 | 46.1 | — | |
| 2021 LH44 | 9 June 2021 | New Horizons KBO Search (266) | 52 | cubewano (cold)? | 43.9 | 0.04 | 2 | 42.2 | 45.6 | albedo: 0.152 | |
| 2021 LH57 | — | — | — | — | 42.4 | 0.12 | 23 | 37.3 | 47.5 | — | |
| 2021 LH58 | — | — | — | — | 39.4 | 0.28 | 22 | 28.6 | 50.3 | — | |
| 2021 LH59 | — | — | — | — | 51.8 | 0.27 | 19 | 37.9 | 65.8 | — | |
| 2021 LJ44 | 9 June 2021 | New Horizons KBO Search (266) | 67 | cubewano (cold)? | 44.0 | 0.05 | 4 | 41.8 | 46.2 | albedo: 0.152 | |
| 2021 LJ57 | — | — | — | — | 43.0 | 0.14 | 15 | 36.9 | 49.1 | — | |
| 2021 LJ58 | — | — | — | — | 47.1 | 0.15 | 22 | 40.1 | 54.2 | — | |
| 2021 LJ59 | — | — | — | — | 39.5 | 0.27 | 23 | 28.6 | 50.3 | — | |
| 2021 LK44 | 9 June 2021 | New Horizons KBO Search (266) | 76 | SDO | 86.0 | 0.57 | 16 | 36.9 | 135.1 | albedo: 0.124 | |
| 2021 LK54 | 8 June 2021 | Canada-France-Hawaii Telescope, Maunakea (T14) | 79 | plutino | 39.3 | 0.22 | 23 | 30.8 | 47.9 | albedo: 0.074 | |
| 2021 LK57 | — | — | — | — | 45.0 | 0.18 | 15 | 36.8 | 53.1 | — | |
| 2021 LK58 | — | — | — | — | 51.1 | 0.28 | 40 | 36.9 | 65.3 | — | |
| 2021 LL37 | 12 June 2021 | DECam (W84) | 574 | SDO | 55.7 | 0.36 | 10 | 35.8 | 75.5 | albedo: 0.124 | |
| 2021 LL44 | 9 June 2021 | New Horizons KBO Search (266) | 43 | cubewano (cold)? | 42.5 | 0.01 | 2 | 42.0 | 43.0 | albedo: 0.152 | |
| 2021 LL54 | 3 June 2021 | Canada-France-Hawaii Telescope, Maunakea (T14) | 90 | other TNO | 39.5 | 0.02 | 19 | 38.7 | 40.2 | albedo: 0.13 | |
| 2021 LL56 | — | — | — | — | 45.1 | 0.16 | 26 | 37.8 | 52.5 | — | |
| 2021 LL57 | — | — | — | — | 48.7 | 0.28 | 24 | 35.1 | 62.2 | — | |
| 2021 LL58 | — | — | — | — | 83.9 | 0.61 | 17 | 33.0 | 134.8 | — | |
| 2021 LM43 | 13 June 2021 | Cerro Tololo Observatory, La Serena (807) | 131 | SDO | 88.7 | 0.63 | 15 | 32.9 | 144.5 | albedo: 0.124 | |
| 2021 LM44 | 9 June 2021 | New Horizons KBO Search (266) | 81 | cubewano (cold)? | 43.7 | 0.09 | 1 | 39.7 | 47.8 | albedo: 0.152 | |
| 2021 LM56 | — | — | — | — | 45.4 | 0.12 | 20 | 40.0 | 50.8 | — | |
| 2021 LM57 | — | — | — | — | 42.1 | 0.22 | 18 | 32.7 | 51.4 | — | |
| 2021 LM58 | — | — | — | — | 45.3 | 0.14 | 22 | 38.8 | 51.9 | — | |
| 2021 LN43 | 6 June 2021 | Cerro Tololo Observatory, La Serena (807) | 295 | twotino | 47.6 | 0.23 | 8 | 36.7 | 58.6 | albedo: 0.126 | |
| 2021 LN44 | 9 June 2021 | New Horizons KBO Search (266) | 54 | plutino | 39.2 | 0.20 | 5 | 31.3 | 47.1 | albedo: 0.074 | |
| 2021 LN56 | — | — | — | — | 59.9 | 0.39 | 30 | 36.7 | 83.2 | — | |
| 2021 LN57 | — | — | — | — | 109.8 | 0.74 | 19 | 28.4 | 191.1 | — | |
| 2021 LN58 | — | — | — | — | 104.8 | 0.67 | 27 | 34.2 | 175.4 | — | |
| 2021 LO43 | 6 June 2021 | Cerro Tololo Observatory, La Serena (807) | 182 | SDO | 63.2 | 0.44 | 15 | 35.6 | 90.8 | albedo: 0.124 | |
| 2021 LO44 | 9 June 2021 | New Horizons KBO Search (266) | 57 | plutino | 39.0 | 0.25 | 19 | 29.4 | 48.7 | albedo: 0.074 | |
| 2021 LO56 | — | — | — | — | 55.1 | 0.44 | 14 | 30.9 | 79.3 | — | |
| 2021 LO57 | — | — | — | — | 68.9 | 0.51 | 22 | 33.6 | 104.1 | — | |
| 2021 LO58 | — | — | — | — | 54.5 | 0.35 | 23 | 35.7 | 73.3 | — | |
| 2021 LP43 | 7 June 2021 | Cerro Tololo Observatory, La Serena (807) | 215 | SDO | 170.3 | 0.77 | 9 | 39.5 | 301.1 | albedo: 0.124 | |
| 2021 LP44 | 9 June 2021 | New Horizons KBO Search (266) | 52 | res · 2:5 | 55.1 | 0.42 | 5 | 31.7 | 78.4 | albedo: 0.126 | |
| 2021 LP56 | — | — | — | — | 47.4 | 0.16 | 17 | 39.8 | 54.9 | — | |
| 2021 LP57 | — | — | — | — | 41.8 | 0.08 | 26 | 38.6 | 45.0 | — | |
| 2021 LP58 | — | — | — | — | 45.6 | 0.17 | 29 | 37.8 | 53.4 | — | |
| 2021 LQ43 | 6 June 2021 | Cerro Tololo Observatory, La Serena (807) | 224 | res · 1:3 | 62.0 | 0.37 | 12 | 38.8 | 85.2 | albedo: 0.126 | |
| 2021 LQ44 | 9 June 2021 | New Horizons KBO Search (266) | 249 | cubewano (hot)? | 47.4 | 0.10 | 21 | 42.9 | 51.9 | albedo: 0.079 | |
| 2021 LQ56 | — | — | — | — | 39.3 | 0.26 | 28 | 29.0 | 49.7 | — | |
| 2021 LQ57 | — | — | — | — | 44.2 | 0.14 | 28 | 38.0 | 50.4 | — | |
| 2021 LQ58 | — | — | — | — | 77.4 | 0.62 | 18 | 29.3 | 125.4 | — | |
| 2021 LR43 | 11 June 2021 | Cerro Tololo Observatory, La Serena (807) | 162 | SDO | 76.1 | 0.49 | 33 | 39.0 | 113.2 | albedo: 0.124 | |
| 2021 LR44 | 9 June 2021 | New Horizons KBO Search (266) | 96 | plutino | 39.3 | 0.17 | 7 | 32.5 | 46.1 | albedo: 0.074 | |
| 2021 LR56 | — | — | — | — | 41.7 | 0.11 | 14 | 37.1 | 46.2 | — | |
| 2021 LR57 | — | — | — | — | 136.5 | 0.75 | 15 | 34.5 | 238.6 | — | |
| 2021 LR58 | — | — | — | — | 52.9 | 0.31 | 19 | 36.5 | 69.2 | — | |
| 2021 LS43 | 7 June 2021 | Cerro Tololo Observatory, La Serena (807) | 176 | SDO | 91.3 | 0.60 | 4 | 36.7 | 145.9 | albedo: 0.124 | |
| 2021 LS44 | 9 June 2021 | New Horizons KBO Search (266) | 69 | cubewano (cold)? | 43.1 | 0.02 | 2 | 42.3 | 43.8 | albedo: 0.152 | |
| 2021 LS56 | — | — | — | — | 38.4 | 0.03 | 24 | 37.1 | 39.7 | — | |
| 2021 LS57 | — | — | — | — | 49.9 | 0.27 | 18 | 36.4 | 63.4 | — | |
| 2021 LS58 | — | — | — | — | 77.8 | 0.54 | 28 | 35.6 | 120.0 | — | |
| 2021 LT44 | 9 June 2021 | New Horizons KBO Search (266) | 36 | cubewano (cold)? | 46.6 | 0.13 | 4 | 40.4 | 52.9 | albedo: 0.152 | |
| 2021 LT56 | — | — | — | — | 43.4 | 0.08 | 20 | 39.8 | 47.0 | — | |
| 2021 LT57 | — | — | — | — | 41.7 | 0.12 | 23 | 36.6 | 46.8 | — | |
| 2021 LT58 | — | — | — | — | 39.2 | 0.21 | 18 | 30.8 | 47.6 | — | |
| 2021 LU43 | 9 June 2021 | New Horizons KBO Search (266) | 188 | cubewano (cold) | 42.6 | 0.02 | 3 | 41.8 | 43.4 | albedo: 0.152 | |
| 2021 LU56 | — | — | — | — | 63.7 | 0.41 | 18 | 37.5 | 90.0 | — | |
| 2021 LU57 | — | — | — | — | 51.8 | 0.30 | 23 | 36.3 | 67.2 | — | |
| 2021 LV43 | 9 June 2021 | New Horizons KBO Search (266) | 37 | twotino | 47.2 | 0.30 | 2 | 32.9 | 61.5 | albedo: 0.126 | |
| 2021 LV44 | 9 June 2021 | New Horizons KBO Search (266) | 54 | plutino | 39.3 | 0.18 | 7 | 32.3 | 46.4 | albedo: 0.074 | |
| 2021 LV56 | — | — | — | — | 68.8 | 0.51 | 18 | 33.9 | 103.6 | — | |
| 2021 LV57 | — | — | — | — | 41.5 | 0.10 | 23 | 37.3 | 45.7 | — | |
| 2021 LV58 | — | — | — | — | 55.1 | 0.42 | 21 | 32.1 | 78.1 | — | |
| 2021 LW43 | 9 June 2021 | New Horizons KBO Search (266) | 39 | SDO | 61.9 | 0.29 | 24 | 43.7 | 80.0 | albedo: 0.124 | |
| 2021 LW44 | 9 June 2021 | New Horizons KBO Search (266) | 102 | cubewano (cold)? | 43.8 | 0.07 | 2 | 40.9 | 46.6 | albedo: 0.152 | |
| 2021 LW56 | — | — | — | — | 54.9 | 0.43 | 17 | 31.4 | 78.4 | — | |
| 2021 LW57 | — | — | — | — | 50.4 | 0.31 | 26 | 34.7 | 66.2 | — | |
| 2021 LW58 | — | — | — | — | 39.3 | 0.11 | 19 | 34.9 | 43.8 | — | |
| 2021 LX43 | 9 June 2021 | New Horizons KBO Search (266) | 55 | cubewano (cold)? | 43.2 | 0.02 | 2 | 42.2 | 44.3 | albedo: 0.152 | |
| 2021 LX44 | 9 June 2021 | New Horizons KBO Search (266) | 198 | plutino | 39.4 | 0.14 | 3 | 34.0 | 44.8 | albedo: 0.074 | |
| 2021 LX56 | — | — | — | — | 53.4 | 0.34 | 23 | 35.2 | 71.6 | — | |
| 2021 LX57 | — | — | — | — | 41.9 | 0.41 | 27 | 24.7 | 59.1 | — | |
| 2021 LX58 | — | — | — | — | 55.3 | 0.36 | 18 | 35.4 | 75.1 | — | |
| 2021 LY43 | 9 June 2021 | New Horizons KBO Search (266) | 72 | cubewano (hot)? | 45.7 | 0.13 | 5 | 40.0 | 51.5 | albedo: 0.079 | |
| 2021 LY44 | 9 June 2021 | New Horizons KBO Search (266) | 75 | SDO | 58.3 | 0.39 | 4 | 35.7 | 80.9 | albedo: 0.124 | |
| 2021 LY56 | — | — | — | — | 38.4 | 0.05 | 32 | 36.6 | 40.3 | — | |
| 2021 LY57 | — | — | — | — | 41.6 | 0.12 | 29 | 36.6 | 46.6 | — | |
| 2021 LY58 | — | — | — | — | 47.0 | 0.22 | 19 | 36.5 | 57.4 | — | |
| 2021 LZ43 | 9 June 2021 | New Horizons KBO Search (266) | 97 | cubewano (cold)? | 43.3 | 0.11 | 2 | 38.6 | 48.1 | albedo: 0.152 | |
| 2021 LZ44 | 9 June 2021 | New Horizons KBO Search (266) | 74 | cubewano (cold)? | 43.6 | 0.04 | 2 | 42.1 | 45.1 | albedo: 0.152 | |
| 2021 LZ56 | — | — | — | — | 40.1 | 0.11 | 16 | 35.6 | 44.6 | — | |
| 2021 LZ57 | — | — | — | — | 73.0 | 0.56 | 21 | 31.9 | 114.2 | — | |
| 2021 LZ58 | — | — | — | — | 39.2 | 0.27 | 28 | 28.5 | 49.9 | — | |
| 2021 MA23 | 17 June 2021 | New Horizons KBO Search (266) | 60 | cubewano (cold)? | 45.3 | 0.08 | 2 | 41.8 | 48.9 | albedo: 0.152 | |
| 2021 MW22 | 17 June 2021 | New Horizons KBO Search (266) | 79 | plutino | 39.3 | 0.24 | 8 | 29.9 | 48.7 | albedo: 0.074 | |
| 2021 MX22 | 17 June 2021 | New Horizons KBO Search (266) | 87 | plutino | 39.3 | 0.22 | 7 | 30.6 | 48.0 | albedo: 0.074 | |
| 2021 MY22 | 17 June 2021 | New Horizons KBO Search (266) | 45 | plutino | 39.2 | 0.24 | 3 | 30.0 | 48.5 | albedo: 0.074 | |
| 2021 MZ22 | 17 June 2021 | New Horizons KBO Search (266) | 55 | cubewano (cold)? | 44.5 | 0.09 | 4 | 40.5 | 48.5 | albedo: 0.152 | |
| 2021 NS71 | 5 July 2021 | New Horizons KBO Search (266) | 141 | unusual | 38.8 | 0.51 | 8 | 18.9 | 58.8 | albedo: 0.051 | |
| 2021 NT97 | — | — | — | — | 45.8 | 0.07 | 1 | 42.6 | 48.9 | — | |
| 2021 NU97 | — | — | — | — | 34.9 | 0.09 | 2 | 31.8 | 38.0 | — | |
| 2021 QB98 | 29 August 2021 | Cerro Tololo Observatory, La Serena (807) | 186 | SDO | 63.6 | 0.53 | 4 | 30.2 | 97.0 | albedo: 0.124 | |
| 2021 QF98 | 29 August 2021 | Cerro Tololo Observatory, La Serena (807) | 158 | centaur | 33.7 | 0.30 | 18 | 23.8 | 43.7 | albedo: 0.058 | |
| 2021 QG98 | 31 August 2021 | Cerro Tololo Observatory, La Serena (807) | 268 | SDO | 61.6 | 0.42 | 21 | 35.8 | 87.4 | albedo: 0.124 | |
| 2021 QH98 | 29 August 2021 | Cerro Tololo Observatory, La Serena (807) | 159 | cubewano (cold) | 42.9 | 0.02 | 2 | 42.2 | 43.5 | albedo: 0.152 | |
| 2021 QJ98 | 29 August 2021 | Cerro Tololo Observatory, La Serena (807) | 211 | res · 1:6 | 98.0 | 0.58 | 22 | 41.2 | 154.8 | albedo: 0.126 | |
| 2021 QT128 | — | — | — | — | 42.5 | 0.06 | 14 | 39.9 | 45.2 | — | |
| 2021 RA237 | 5 September 2021 | DECam (W84) | 55 | SDO | 53.7 | 0.36 | 2 | 34.3 | 73.0 | albedo: 0.124 | |
| 2021 RB237 | 5 September 2021 | DECam (W84) | 51 | cubewano (cold) | 42.9 | 0.04 | 2 | 41.3 | 44.4 | albedo: 0.152 | |
| 2021 RC237 | 5 September 2021 | DECam (W84) | 82 | cubewano (cold) | 45.7 | 0.08 | 1 | 41.9 | 49.5 | albedo: 0.152 | |
| 2021 RD237 | 4 September 2021 | DECam (W84) | 111 | cubewano (hot) | 41.7 | 0.13 | 33 | 36.2 | 47.2 | albedo: 0.079 | |
| 2021 RE237 | 5 September 2021 | DECam (W84) | 61 | cubewano (cold) | 45.5 | 0.12 | 2 | 40.0 | 51.0 | albedo: 0.152 | |
| 2021 RF237 | 5 September 2021 | DECam (W84) | 52 | cubewano (cold) | 44.0 | 0.09 | 4 | 40.1 | 47.9 | albedo: 0.152 | |
| 2021 RG237 | 9 September 2021 | DECam (W84) | 58 | cubewano (cold) | 43.1 | 0.07 | 2 | 40.0 | 46.1 | albedo: 0.152 | |
| 2021 RH237 | 5 September 2021 | DECam (W84) | 66 | cubewano (cold) | 44.5 | 0.05 | 2 | 42.1 | 46.8 | albedo: 0.152 | |
| 2021 RJ237 | 9 September 2021 | DECam (W84) | 52 | cubewano (cold) | 43.8 | 0.03 | 2 | 42.6 | 45.1 | albedo: 0.152 | |
| 2021 RK237 | 5 September 2021 | DECam (W84) | 49 | cubewano (cold) | 42.9 | 0.06 | 4 | 40.4 | 45.3 | albedo: 0.152 | |
| 2021 RL237 | 5 September 2021 | DECam (W84) | 35 | SDO | 81.2 | 0.54 | 14 | 37.0 | 125.4 | albedo: 0.124 | |
| 2021 RM114 | 13 September 2021 | Pan-STARRS 1 (F51) | 2.7 | damocloid | 106.8 | 0.96 | 103 | 4.0 | 209.6 | albedo: 0.048 | |
| 2021 RM237 | 9 September 2021 | DECam (W84) | 116 | plutino | 39.4 | 0.19 | 12 | 31.8 | 46.9 | albedo: 0.074 | |
| 2021 RM238 | 9 September 2021 | DECam (W84) | 105 | SDO | 90.6 | 0.58 | 24 | 37.8 | 143.5 | albedo: 0.124 | |
| 2021 RN237 | 9 September 2021 | DECam (W84) | 55 | cubewano (cold) | 45.5 | 0.07 | 3 | 42.3 | 48.7 | albedo: 0.152 | |
| 2021 RN238 | 6 September 2021 | DECam (W84) | 66 | cubewano (cold) | 42.9 | 0.05 | 1 | 40.7 | 45.1 | albedo: 0.152 | |
| 2021 RR205 | 5 September 2021 | Maunakea (568) | 169 | EDDO | 949.5 | 0.94 | 8 | 55.6 | 1843.3 | albedo: 0.124 | |
| 2021 RR237 | 9 September 2021 | DECam (W84) | 69 | cubewano (hot) | 43.2 | 0.09 | 21 | 39.5 | 46.9 | albedo: 0.079 | |
| 2021 RS237 | 4 September 2021 | DECam (W84) | 90 | cubewano (cold) | 43.1 | 0.01 | 1 | 42.5 | 43.6 | albedo: 0.152 | |
| 2021 RT237 | 6 September 2021 | DECam (W84) | 117 | plutino | 39.5 | 0.13 | 3 | 34.5 | 44.4 | albedo: 0.074 | |
| 2021 RU236 | 6 September 2021 | DECam (W84) | 93 | cubewano (cold) | 44.3 | 0.06 | 1 | 41.6 | 46.9 | albedo: 0.152 | |
| 2021 RU237 | 6 September 2021 | DECam (W84) | 71 | cubewano (cold) | 44.4 | 0.07 | 3 | 41.3 | 47.4 | albedo: 0.152 | |
| 2021 RV209 | 3 September 2021 | Cerro Tololo Observatory, La Serena (807) | 248 | SDO | 61.0 | 0.44 | 14 | 34.2 | 87.9 | albedo: 0.124 | |
| 2021 RV236 | 6 September 2021 | DECam (W84) | 59 | SDO | 51.3 | 0.25 | 0 | 38.3 | 64.3 | albedo: 0.124 | |
| 2021 RV237 | 9 September 2021 | DECam (W84) | 66 | SDO | 80.9 | 0.51 | 29 | 39.3 | 122.5 | albedo: 0.124 | |
| 2021 RW209 | 7 September 2021 | Maunakea (568) | 121 | SDO | 76.5 | 0.33 | 42 | 51.5 | 101.6 | albedo: 0.124 | |
| 2021 RW236 | 4 September 2021 | DECam (W84) | 118 | cubewano (cold) | 45.9 | 0.13 | 4 | 40.1 | 51.7 | albedo: 0.152 | |
| 2021 RW237 | 7 September 2021 | DECam (W84) | 217 | SDO | 77.0 | 0.51 | 21 | 37.5 | 116.5 | albedo: 0.124 | |
| 2021 RX236 | 6 September 2021 | DECam (W84) | 69 | cubewano (cold) | 44.2 | 0.07 | 1 | 41.1 | 47.2 | albedo: 0.152 | |
| 2021 RX237 | 6 September 2021 | DECam (W84) | 79 | cubewano (cold) | 42.6 | 0.04 | 3 | 41.0 | 44.2 | albedo: 0.152 | |
| 2021 RY236 | 5 September 2021 | DECam (W84) | 65 | cubewano (cold) | 43.0 | 0.02 | 2 | 42.0 | 44.0 | albedo: 0.152 | |
| 2021 RZ236 | 7 September 2021 | DECam (W84) | 74 | cubewano (hot) | 43.5 | 0.09 | 15 | 39.8 | 47.3 | albedo: 0.079 | |
| 2021 TH165 | 11 October 2021 | Pan-STARRS 1 (F51) | 73 | other TNO | 39.8 | 0.46 | 155 | 21.6 | 58.1 | albedo: 0.13 | |
| 2021 TH192 | 2 October 2021 | DECam (W84) | 99 | cubewano (cold) | 42.9 | 0.04 | 2 | 41.3 | 44.5 | albedo: 0.152 | |
| 2021 TJ192 | 4 October 2021 | DECam (W84) | 125 | SDO | 52.3 | 0.28 | 10 | 37.5 | 67.1 | albedo: 0.124 | |
| 2021 TK192 | 6 October 2021 | DECam (W84) | 97 | cubewano (cold) | 43.9 | 0.05 | 2 | 41.9 | 46.0 | albedo: 0.152 | |
| 2021 TP191 | 4 October 2021 | DECam (W84) | 48 | cubewano (cold)? | 45.8 | 0.08 | 3 | 42.0 | 49.5 | albedo: 0.152 | |
| 2021 UL19 | 17 October 2021 | Mt. Lemmon Survey (G96) | 1 | damocloid | 38.3 | 0.95 | 155 | 1.9 | 74.7 | albedo: 0.048 | |
| 2021 XD7 | 3 December 2021 | Mt. Graham-VATT (290) | 153 | other TNO | 48.9 | 0.29 | 12 | 34.5 | 63.2 | albedo: 0.13 | |
| 2021 XS6 | 3 December 2021 | Mt. Lemmon Survey (G96) | 3 | damocloid | 39.2 | 0.90 | 97 | 3.9 | 74.4 | albedo: 0.048 | |
References
- ↑ "Lists and Plots: Minor Planets". Minor Planet Center. 29 October 2026. Retrieved 29 October 2026.
- ↑ "MPC Database Search: a ≥ 30.1 AU". Minor Planet Center. Archived from the original on 23 October 2025. Retrieved 2 November 2026.
- ↑ "List of Known Trans-Neptunian Objects". Johnston's Archive. 19 January 2026. Retrieved 1 March 2026.