List of unnumbered trans-Neptunian objects: 2021

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The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2021. As of October 2025, it contains a total of 123 bodies.[1][2][3][4][5] For more information see the description on the main page. Also see list for the previous and next year.

2021

See also: List of unnumbered trans-Neptunian objects
More information Designation, First Observed (discovered) ...
Designation First Observed (discovered) D (km) Orbital description Remarks Refs
Date Observer
(Site)		 Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2021 AN2812 January 2021Mauna Kea Obs. (568)44other TNO34.10.1230.637.5—MPC · JPL
2021 BK1518 January 2021Las Campanas Obs. (304)126res · 2:555.50.381234.676.3—MPC · JPL
2021 CG5615 February 2021Mauna Kea Obs. (568)131SDO57.10.351337.476.9—MPC · JPL
2021 CJ4615 February 2021Mauna Kea Obs. (568)263cubewano (cold)44.10.04342.445.9—MPC · JPL
2021 CK4615 February 2021Mauna Kea Obs. (568)260res · 2:7700.492336104—MPC · JPL
2021 CL4615 February 2021Mauna Kea Obs. (568)169SDO56.80.4934.179.5—MPC · JPL
2021 CP4015 February 2021Mauna Kea Obs. (568)150other TNO550.123848.561.4—MPC · JPL
2021 CP57 February 2021Pan-STARRS 1 (F51)20centaur401.80.97910.6793.1—MPC · JPL
2021 DF2617 February 2021Mauna Kea-Subaru (T09)——43.20.13337.748.6—MPC · JPL
2021 DG1717 February 2021Mauna Kea Obs. (568)372SDO62.30.23304876.6—MPC · JPL
2021 DG2617 February 2021Mauna Kea-Subaru (T09)——52.50.111846.558.5—MPC · JPL
2021 DH1717 February 2021Mauna Kea Obs. (568)233cubewano (hot)46.10.131139.952.3—MPC · JPL
2021 DJ1717 February 2021Mauna Kea Obs. (568)167res · 2:5?55.30.252541.469.2—MPC · JPL
2021 DK1817 February 2021Mauna Kea Obs. (568)169EDDO837.30.951544.61630—MPC · JPL
2021 DL117 February 2021Mt. Lemmon Survey (G96)9damocloid34.40.891493.964.9—MPC · JPL
2021 DM1517 February 2021Mauna Kea Obs. (568)89cubewano (cold)45.90.04243.947.9—MPC · JPL
2021 DM1916 February 2021Mauna Kea Obs. (568)113SDO83.70.552837.4130.1—MPC · JPL
2021 DN1517 February 2021Mauna Kea Obs. (568)112cubewano (cold)44.30.06341.846.8—MPC · JPL
2021 DN1917 February 2021Mauna Kea Obs. (568)172cubewano (cold)?47.20.11341.952.5—MPC · JPL
2021 DO1516 February 2021Mauna Kea Obs. (568)191other TNO51.10.162342.759.4—MPC · JPL
2021 DP1516 February 2021Mauna Kea Obs. (568)253SDO61.60.443786.2—MPC · JPL
2021 DQ1516 February 2021Mauna Kea Obs. (568)217res · 2:555.60.41332.778.6—MPC · JPL
2021 DR1517 February 2021Mauna Kea Obs. (568)716SDO67.70.433038.696.8—MPC · JPL
2021 DS1517 February 2021Mauna Kea Obs. (568)166cubewano (cold)43.70.05341.545.9—MPC · JPL
2021 EE445 March 2021Lowell Discovery Telescope (G37)277centaur42.80.34828.257.3—MPC · JPL
2021 FQ5417 March 2021Las Campanas Obs. (304)97SDO67.90.441837.997.9—MPC · JPL
2021 GQ579 April 2021Pan-STARRS 1 (F51)3damocloid84.50.961253.4165.7—MPC · JPL
2021 GU1225 April 2021KMTNet-CTIO (W93)122SDO60.70.331240.980.6—MPC · JPL
2021 GW12212 April 2021KMTNet-CTIO (W93)100cubewano (cold)42.40.03141.243.7—MPC · JPL
2021 LA449 June 2021New Horizons KBO Search (266)157plutino39.30.2531.447.1—MPC · JPL
2021 LA459 June 2021New Horizons KBO Search (266)83cubewano (cold)?42.40.03241.343.5—MPC · JPL
2021 LB449 June 2021New Horizons KBO Search (266)61cubewano (cold)?420.11337.446.6—MPC · JPL
2021 LB459 June 2021New Horizons KBO Search (266)31twotino47.50.23936.358.6—MPC · JPL
2021 LC449 June 2021New Horizons KBO Search (266)66cubewano (cold)?46.20.13240.352.2—MPC · JPL
2021 LD449 June 2021New Horizons KBO Search (266)111plutino39.20.3227.351.1—MPC · JPL
2021 LE449 June 2021New Horizons KBO Search (266)71cubewano (cold)?44.10.08340.547.6—MPC · JPL
2021 LF449 June 2021New Horizons KBO Search (266)48cubewano (hot)?41.40.11837.345.6—MPC · JPL
2021 LG449 June 2021New Horizons KBO Search (266)37cubewano (cold)?43.50.05141.345.6—MPC · JPL
2021 LH449 June 2021New Horizons KBO Search (266)52cubewano (cold)?43.90.04242.245.6—MPC · JPL
2021 LJ449 June 2021New Horizons KBO Search (266)67cubewano (cold)?440.05441.846.2—MPC · JPL
2021 LK449 June 2021New Horizons KBO Search (266)76SDO85.90.571637134.8—MPC · JPL
2021 LK548 June 2021Mauna Kea-Canada–France–Hawaii Telescope (T14)——39.30.222330.847.8—MPC · JPL
2021 LL3712 June 2021Cerro Tololo-DECam (W84)574SDO55.60.361035.775.6—MPC · JPL
2021 LL449 June 2021New Horizons KBO Search (266)43cubewano (cold)?42.60.0124243.1—MPC · JPL
2021 LL543 June 2021Mauna Kea-Canada–France–Hawaii Telescope (T14)——39.40.021938.740.2—MPC · JPL
2021 LM4313 June 2021Cerro Tololo Obs. (807)131SDO88.30.631532.9143.7—MPC · JPL
2021 LM449 June 2021New Horizons KBO Search (266)81cubewano (cold)?43.70.09139.747.8—MPC · JPL
2021 LN436 June 2021Cerro Tololo Obs. (807)295twotino47.60.23836.658.6—MPC · JPL
2021 LN449 June 2021New Horizons KBO Search (266)54plutino39.20.2531.347.2—MPC · JPL
2021 LO436 June 2021Cerro Tololo Obs. (807)182SDO63.20.441535.590.9—MPC · JPL
2021 LO449 June 2021New Horizons KBO Search (266)57plutino390.251929.448.6—MPC · JPL
2021 LP437 June 2021Cerro Tololo Obs. (807)215SDO169.10.77939.4298.8—MPC · JPL
2021 LP449 June 2021New Horizons KBO Search (266)52res · 2:555.10.43531.778.5—MPC · JPL
2021 LQ436 June 2021Cerro Tololo Obs. (807)224res · 1:361.90.381238.685.1—MPC · JPL
2021 LQ449 June 2021New Horizons KBO Search (266)249cubewano (hot)?47.40.12142.951.9—MPC · JPL
2021 LR4311 June 2021Cerro Tololo Obs. (807)162SDO76.30.493338.9113.7—MPC · JPL
2021 LR449 June 2021New Horizons KBO Search (266)96plutino39.30.18732.446.2—MPC · JPL
2021 LS437 June 2021Cerro Tololo Obs. (807)176SDO910.6436.6145.3—MPC · JPL
2021 LS449 June 2021New Horizons KBO Search (266)69cubewano (cold)?43.10.02242.343.8—MPC · JPL
2021 LT449 June 2021New Horizons KBO Search (266)36cubewano (cold)?46.60.13440.452.9—MPC · JPL
2021 LU439 June 2021New Horizons KBO Search (266)188cubewano (cold)42.60.02341.843.4—MPC · JPL
2021 LV439 June 2021New Horizons KBO Search (266)37twotino47.20.3232.961.4—MPC · JPL
2021 LV449 June 2021New Horizons KBO Search (266)54plutino39.30.18732.346.4—MPC · JPL
2021 LW439 June 2021New Horizons KBO Search (266)39SDO61.90.292443.780.1—MPC · JPL
2021 LW449 June 2021New Horizons KBO Search (266)102cubewano (cold)?43.80.07240.946.7—MPC · JPL
2021 LX439 June 2021New Horizons KBO Search (266)55cubewano (cold)?43.20.02242.344.2—MPC · JPL
2021 LX449 June 2021New Horizons KBO Search (266)198plutino39.40.1433444.8—MPC · JPL
2021 LY439 June 2021New Horizons KBO Search (266)72cubewano (hot)?45.80.1354051.5—MPC · JPL
2021 LY449 June 2021New Horizons KBO Search (266)75SDO58.20.39435.780.7—MPC · JPL
2021 LZ439 June 2021New Horizons KBO Search (266)97cubewano (cold)?43.30.11238.648.1—MPC · JPL
2021 LZ449 June 2021New Horizons KBO Search (266)74cubewano (cold)?43.60.04242.145.1—MPC · JPL
2021 MA2317 June 2021New Horizons KBO Search (266)60cubewano (cold)?45.30.08241.848.9—MPC · JPL
2021 MW2217 June 2021New Horizons KBO Search (266)79plutino39.30.24829.948.7—MPC · JPL
2021 MX2217 June 2021New Horizons KBO Search (266)87plutino39.30.22730.648—MPC · JPL
2021 MY2217 June 2021New Horizons KBO Search (266)45plutino39.30.2433048.5—MPC · JPL
2021 MZ2217 June 2021New Horizons KBO Search (266)55cubewano (cold)?44.50.09440.648.4—MPC · JPL
2021 NS715 July 2021New Horizons KBO Search (266)141unusual37.30.91213.471.2—MPC · JPL
2021 PN7213 August 2021Pan-STARRS 1 (F51)25damocloid323.50.99854.5642.5—MPC · JPL
2021 QB9829 August 2021Cerro Tololo Obs. (807)186SDO63.70.53430.297.2—MPC · JPL
2021 QF9829 August 2021Cerro Tololo Obs. (807)158centaur33.70.291823.843.7—MPC · JPL
2021 QG9831 August 2021Cerro Tololo Obs. (807)268SDO61.60.422135.887.3—MPC · JPL
2021 QH9829 August 2021Cerro Tololo Obs. (807)159cubewano (cold)42.90.02242.243.6—MPC · JPL
2021 QJ9829 August 2021Cerro Tololo Obs. (807)211res · 1:698.20.582241.2155.2—MPC · JPL
2021 RA2375 September 2021Cerro Tololo-DECam (W84)55SDO53.80.36234.473.2—MPC · JPL
2021 RB2375 September 2021Cerro Tololo-DECam (W84)51cubewano (cold)42.90.04241.444.5—MPC · JPL
2021 RC2375 September 2021Cerro Tololo-DECam (W84)82cubewano (cold)45.80.08141.949.7—MPC · JPL
2021 RD2374 September 2021Cerro Tololo-DECam (W84)111cubewano (hot)41.70.133336.247.3—MPC · JPL
2021 RE2375 September 2021Cerro Tololo-DECam (W84)61cubewano (cold)45.60.1224051.1—MPC · JPL
2021 RF2375 September 2021Cerro Tololo-DECam (W84)52cubewano (cold)44.10.09440.248—MPC · JPL
2021 RG2379 September 2021Cerro Tololo-DECam (W84)58cubewano (cold)43.20.0724046.3—MPC · JPL
2021 RH2375 September 2021Cerro Tololo-DECam (W84)66cubewano (cold)44.50.05242.246.8—MPC · JPL
2021 RJ2379 September 2021Cerro Tololo-DECam (W84)52cubewano (cold)43.90.03242.745.1—MPC · JPL
2021 RK2375 September 2021Cerro Tololo-DECam (W84)49cubewano (cold)42.90.06440.545.4—MPC · JPL
2021 RL2375 September 2021Cerro Tololo-DECam (W84)35SDO81.50.551437126—MPC · JPL
2021 RM11413 September 2021Pan-STARRS 1 (F51)2.7damocloid105.90.961034207.7—MPC · JPL
2021 RM2379 September 2021Cerro Tololo-DECam (W84)116plutino39.40.191231.946.9—MPC · JPL
2021 RM2389 September 2021Cerro Tololo-DECam (W84)105SDO910.592437.8144.1—MPC · JPL
2021 RN2379 September 2021Cerro Tololo-DECam (W84)55cubewano (cold)45.60.07342.448.8—MPC · JPL
2021 RN2386 September 2021Cerro Tololo-DECam (W84)66cubewano (cold)430.05140.745.3—MPC · JPL
2021 RR2055 September 2021Mauna Kea Obs. (568)169EDDO973.80.94855.61891.9—MPC · JPL
2021 RR2379 September 2021Cerro Tololo-DECam (W84)69cubewano (hot)43.30.092139.547—MPC · JPL
2021 RS2374 September 2021Cerro Tololo-DECam (W84)90cubewano (cold)43.10.01142.643.7—MPC · JPL
2021 RT2376 September 2021Cerro Tololo-DECam (W84)117plutino39.50.12334.644.4—MPC · JPL
2021 RU2366 September 2021Cerro Tololo-DECam (W84)93cubewano (cold)44.30.06141.746.9—MPC · JPL
2021 RU2376 September 2021Cerro Tololo-DECam (W84)71cubewano (cold)44.40.07341.347.5—MPC · JPL
2021 RV2093 September 2021Cerro Tololo Obs. (807)248SDO610.441434.287.9—MPC · JPL
2021 RV2366 September 2021Cerro Tololo-DECam (W84)59SDO51.40.26038.364.5—MPC · JPL
2021 RV2379 September 2021Cerro Tololo-DECam (W84)66SDO81.20.522939.3123—MPC · JPL
2021 RW2097 September 2021Mauna Kea Obs. (568)121SDO76.60.334251.5101.7—MPC · JPL
2021 RW2364 September 2021Cerro Tololo-DECam (W84)120cubewano (cold)460.13440.151.8—MPC · JPL
2021 RW2377 September 2021Cerro Tololo-DECam (W84)217SDO77.10.512137.6116.6—MPC · JPL
2021 RX2366 September 2021Cerro Tololo-DECam (W84)69cubewano (cold)44.20.07141.247.2—MPC · JPL
2021 RX2376 September 2021Cerro Tololo-DECam (W84)79cubewano (cold)42.70.0434144.3—MPC · JPL
2021 RY2365 September 2021Cerro Tololo-DECam (W84)65cubewano (cold)43.10.0324244.1—MPC · JPL
2021 RZ2367 September 2021Cerro Tololo-DECam (W84)74cubewano (hot)43.60.081539.947.3—MPC · JPL
2021 TH16511 October 2021Pan-STARRS 1 (F51)73other TNO39.80.4615521.657.9—MPC · JPL
2021 TH1922 October 2021Cerro Tololo-DECam (W84)98cubewano (cold)430.04241.344.7—MPC · JPL
2021 TJ1924 October 2021Cerro Tololo-DECam (W84)126SDO52.40.281037.567.3—MPC · JPL
2021 TK1926 October 2021Cerro Tololo-DECam (W84)97cubewano (cold)440.05241.946.2—MPC · JPL
2021 TP1914 October 2021Cerro Tololo-DECam (W84)48cubewano (cold)?45.80.08342.149.6—MPC · JPL
2021 UL1917 October 2021Mt. Lemmon Survey (G96)1damocloid380.951551.974.1—MPC · JPL
2021 XD73 December 2021VATT (290)154other TNO48.90.291234.563.3—MPC · JPL
2021 XS63 December 2021Mt. Lemmon Survey (G96)3damocloid39.10.9973.974.3—MPC · JPL
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