List of unnumbered trans-Neptunian objects: 2023

The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2023. , it contains a total of 59 bodies. For more information see the description on the main page. Also see list for the previous and next year.

2023

Designation First Observed (discovered) D (km) Orbital description Remarks Refs Date Observer(Site) Class a e i q Q 19 February 2023 Mt. Lemmon Survey () 8 damocloid 91.6 0.95 118 4.8 178.4 albedo: 0.048 17 February 2023 Cerro Tololo-DECam () 147 cubewano (hot)? 46.1 0.13 28 40.2 52.0 albedo: 0.079 21 March 2023 Maunakea () 146 cubewano (hot)? 44.2 0.14 7 38.2 50.2 albedo: 0.079 21 March 2023 Maunakea () 182 cubewano (cold)? 44.7 0.10 3 40.2 49.3 albedo: 0.152 21 March 2023 Maunakea () 157 SDO 72.0 0.49 23 36.5 107.5 albedo: 0.124 21 March 2023 Maunakea () 102 other TNO 52.8 0.23 9 40.6 65.0 albedo: 0.13 21 March 2023 D. J. Tholen () 200 cubewano (hot)? 41.9 0.04 14 40.3 43.6 albedo: 0.079 21 March 2023 Subaru Telescope, Maunakea () 90 other TNO 56.2 0.32 28 38.1 74.3 albedo: 0.13 21 March 2023 D. J. Tholen () 150 plutino 39.6 0.13 7 34.5 44.7 albedo: 0.074 21 March 2023 Subaru Telescope, Maunakea () 100 other TNO 46.1 0.29 2 32.9 59.3 albedo: 0.13 21 March 2023 D. J. Tholen () 138 cubewano (hot)? 43.9 0.12 28 38.5 49.3 albedo: 0.079 21 March 2023 Subaru Telescope, Maunakea () 116 cubewano (cold)? 43.2 0.09 4 39.2 47.2 albedo: 0.152 21 March 2023 Subaru Telescope, Maunakea () 130 SDO 67.3 0.46 19 36.2 98.4 albedo: 0.124 21 March 2023 D. J. Tholen () 174 cubewano (cold)? 44.7 0.06 3 42.1 47.2 albedo: 0.152 21 March 2023 Subaru Telescope, Maunakea () 167 cubewano (hot)? 43.7 0.10 18 39.5 47.9 albedo: 0.079 21 March 2023 Subaru Telescope, Maunakea () 162 cubewano (hot)? 47.0 0.11 18 42.0 52.1 albedo: 0.079 21 March 2023 D. J. Tholen () 113 cubewano (cold)? 43.8 0.09 4 40.0 47.6 albedo: 0.152 21 March 2023 Subaru Telescope, Maunakea () 194 cubewano (hot)? 44.0 0.15 9 37.6 50.4 albedo: 0.079 21 March 2023 Subaru Telescope, Maunakea () 199 cubewano (hot)? 46.2 0.11 5 41.4 51.1 albedo: 0.079 21 March 2023 Subaru Telescope, Maunakea () 119 cubewano (cold)? 42.1 0.09 2 38.2 46.0 albedo: 0.152 21 March 2023 Subaru Telescope, Maunakea () 206 centaur 30.1 0.54 8 13.7 46.5 albedo: 0.058 21 March 2023 Maunakea () 268 cubewano (hot)? 42.7 0.03 11 41.3 44.0 albedo: 0.079 21 March 2023 Maunakea () 318 SDO 54.3 0.30 4 37.9 70.6 albedo: 0.124 21 March 2023 Maunakea () 139 cubewano (hot)? 45.2 0.25 10 34.0 56.3 albedo: 0.079 21 March 2023 Maunakea () 310 centaur 43.9 0.50 34 21.9 65.8 albedo: 0.058 18 March 2023 Korea Microlensing Telescope Network-CTIO () 134 other TNO 51.8 0.11 3 46.3 57.2 albedo: 0.13 21 March 2023 Maunakea () 157 cubewano (cold)? 45.1 0.15 3 38.4 51.8 albedo: 0.152 21 March 2023 Maunakea () 161 cubewano (cold)? 44.3 0.05 2 41.9 46.6 albedo: 0.152 21 March 2023 Maunakea () 113 SDO 71.9 0.52 5 34.3 109.5 albedo: 0.124 21 March 2023 Maunakea () 162 cubewano (hot)? 42.3 0.19 5 34.4 50.3 albedo: 0.079 12 April 2023 Cerro Tololo-DECam () 113 SDO 131.6 0.70 28 39.3 224.0 albedo: 0.124 22 April 2023 Las Campanas Observatory () 229 cubewano (hot)? 43.1 0.17 13 35.8 50.3 albedo: 0.079 16 May 2023 D. J. Tholen () 167 SDO 246.1 0.73 11 65.9 426.3 albedo: 0.124 — — — — 56.0 0.36 11 35.9 76.2 — 13 August 2023 D. J. Tholen () 107 res4:5 34.9 0.07 7 32.4 37.4 albedo: 0.126 13 August 2023 D. J. Tholen () 135 res3:5 42.2 0.10 26 38.0 46.4 albedo: 0.126 13 August 2023 D. J. Tholen () 83 other TNO 47.7 0.37 8 30.1 65.4 albedo: 0.13 13 August 2023 D. J. Tholen () 152 plutino 39.2 0.25 6 29.3 49.1 albedo: 0.074 13 August 2023 D. J. Tholen () 103 plutino 39.5 0.28 9 28.5 50.4 albedo: 0.074 13 August 2023 D. J. Tholen () 115 SDO 94.2 0.66 12 31.6 156.8 albedo: 0.124 13 August 2023 D. J. Tholen () 121 SDO 116.4 0.65 31 41.0 191.9 albedo: 0.124 13 August 2023 D. J. Tholen () 119 SDO 60.3 0.41 16 35.9 84.7 albedo: 0.124 13 August 2023 D. J. Tholen () 89 twotino 47.5 0.33 3 31.9 63.1 albedo: 0.126 13 August 2023 D. J. Tholen () 119 res3:5 42.1 0.12 9 37.0 47.2 albedo: 0.126 13 August 2023 D. J. Tholen () 183 cubewano (hot)? 44.7 0.16 9 37.6 51.9 albedo: 0.079 13 August 2023 D. J. Tholen () 108 other TNO 37.9 0.03 22 36.7 39.0 albedo: 0.13 13 August 2023 D. J. Tholen () 163 other TNO 52.5 0.10 25 47.0 58.0 albedo: 0.13 13 August 2023 D. J. Tholen () 209 cubewano (cold)? 44.0 0.04 3 42.2 45.7 albedo: 0.152 13 August 2023 D. J. Tholen () 104 other TNO 52.6 0.10 9 47.7 57.6 albedo: 0.13 13 August 2023 D. J. Tholen () 233 SDO 120.4 0.69 22 36.8 204.0 albedo: 0.124 13 August 2023 D. J. Tholen () 185 SDO 69.4 0.53 5 32.4 106.4 albedo: 0.124 13 August 2023 D. J. Tholen () 103 centaur 185.6 0.89 9 20.6 350.6 albedo: 0.058 13 August 2023 D. J. Tholen () 140 res4:7 43.5 0.27 7 31.8 55.3 albedo: 0.126 20 August 2023 Pan-STARRS 1 () 2.5 damocloid 79.8 0.96 103 3.1 156.5 albedo: 0.048 8 September 2023 Pan-STARRS 2 () 13 centaur 108.4 0.95 122 5.2 211.6 albedo: 0.058 18 September 2023 Pan-STARRS 1 () 160 centaur 69.6 0.72 97 19.5 119.7 albedo: 0.058 15 October 2023 Pan-STARRS 1 () 4 damocloid 57.7 0.95 159 3.0 112.5 albedo: 0.048 23 October 2023 Pan-STARRS 1 () 38 centaur 75.1 0.82 32 13.4 136.8 albedo: 0.058 1 November 2023 Pan-STARRS 1 () 12 damocloid 30.4 0.89 43 3.5 57.3 albedo: 0.048

References