List of unnumbered trans-Neptunian objects

Last updated

Ecc wo c.png
TNOs: a vs. e (semi-log plot, 30–1000 AU): [1]

  Resonant plutinos (39  AU) and twotinos (48 AU)   Inner and outer classical objects (< 39 and > 49 AU)  Other resonant objects besides plutinos and twotinos   Classical Kuiper belt objects (cubewanos)   Scattered disc objects (SDO)  Other TNOs (dots) and centaurs (asterisk)   Sednoids, prominent ETNOs

Contents

Circle frame.svgplutinos (3∶2 res.): 438 objects (12.3%)Haumeids: 12 objects (0.3%)twotinos (2∶1 res.): 107 objects (3.0%)other resonances: 377 objects (10.6%)cold classical: 716 objects (20.1%)hot classical: 257 objects (7.2%)SDOs: 565 objects (15.9%)sednoids: 4 objects (0.1%)ESDOs: 10 objects (0.3%)EDDOs: 10 objects (0.3%)damocloids: 71 objects (2.0%)centaurs: 211 objects (5.9%)unclassified TNOs: 782 objects (22.0%)
Distribution of 3,590 listed TNO objects (with a > 30.1 AU, including candidates) by subclass from Johnston's Archive (hover) [1]

This is a list of unnumbered trans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year of principal provisional designation. The data is sourced from the Minor Planet Center's (MPC) List of Trans Neptunian Objects and List Of Centaurs and Scattered-Disk Objects. [2] [3] These objects will eventually be numbered as secured discoveries with an official discoverer determined by the MPC. Until then, additional observations are needed to sufficiently decrease an object's orbital uncertainty. As of April 2022, there are 3,141 unnumbered objects, defined here as minor planets with a semi-major axis larger than 30.1  AU (Neptune's average orbital distance from the Sun). [lower-alpha 1]

The list also contains information from "Johnston's Archive", such as an object's diameter, its dynamical class and binary status with the satellite's diameter, as well as its albedo, spectral taxonomy and B–R color index. [1] Members of the extreme trans-Neptunian objects (ESDOs, EDDOs and sednoids) – with a semi-major axis greater than 150 AU and perihelion greater than 30 AU – are also identified.

Statistics

100
200
300
400
500
600
700
800
'92
'94
'96
'98
'00
'02
'04
'06
'08
'10
'12
'14
'16
'18
'20
'22
TNOs by year of principle designation since 1992 (objects with a < 30.1 AU excluded). As of April 2022, there are    3,141 unnumbered TNOs and    783 numbered TNOs (Pluto from 1930 is not shown) [2] [3]
Circle frame.svgNumbered TNOs: 901 obj. (22.3%)Unnumbered TNOs: 3,141 obj. (77.7%)
  •   Numbered TNOs: 901 obj. (22.3%)
  •   Unnumbered TNOs: 3,141 obj. (77.7%)
Split-up of numbered and unnumbered trans-Neptunian objects [2] [3]

List

1993

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1993 RP 15 September 1993 Mauna Kea Obs. ( 568 )48 res  · 4:5 35.10.06433.237.0— MPC  · JPL

1994

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1994 ES213 March 1994 J. X. Luu
D. C. Jewitt ( 568 )		100 cubewano (cold)45.60.11140.450.8BR-mag: 1.65 MPC  · JPL
1994 TG3 October 1994 Mauna Kea Obs. (568)204cubewano (hot)42.30.00742.342.3— MPC  · JPL
1994 TG28 October 1994 La Silla Obs. ( 809 )137cubewano?42.40.00242.442.4— MPC  · JPL
1994 TH3 October 1994 Mauna Kea Obs. ( 568 )166other TNO40.90.001640.940.9— MPC  · JPL

1995

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1995 DB224 February 1995 D. C. Jewitt
J. X. Luu ( 568 )		100 cubewano (cold)46.20.13440.152.2— MPC  · JPL
1995 FB2129 March 1995Siding Spring Observatory ( 413 )109cubewano?42.40.00142.442.4— MPC  · JPL
1995 GA73 April 1995 Mauna Kea Obs. ( 568 )150 plutino?39.50.12434.844.2— MPC  · JPL
1995 GJ 3 April 1995Mauna Kea Obs. (568)166other TNO42.90.092339.046.8— MPC  · JPL
1995 GY76 April 1995 La Silla Obs. ( 809 )109 cubewano?41.30.00141.341.3— MPC  · JPL
1995 KJ130 May 1995 Mauna Kea Obs. ( 568 )172cubewano?43.50.00343.543.5— MPC  · JPL
1995 KK130 May 1995Mauna Kea Obs. (568)94 plutino?39.50.19932.047.0— MPC  · JPL
1995 YY324 December 1995Mauna Kea Obs. (568)83other TNO39.20.22030.647.7— MPC  · JPL

1996

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1996 AS2014 January 1996 Spacewatch ( 691 )77 centaur 35.80.621113.658.0— MPC  · JPL
1996 KV121 May 1996 C. Trujillo
D. C. Jewitt
J. X. Luu ( 568 )		178 cubewano (hot)45.50.12840.250.9— MPC  · JPL
1996 KX122 May 1996 Mauna Kea Obs. (568)94 plutino?39.50.10235.743.4— MPC  · JPL
1996 KY116 May 1996Mauna Kea Obs. (568)119plutino?39.50.103135.743.3— MPC  · JPL
1996 RQ206 September 1996 D. L. Rabinowitz ( 675 )173other TNO44.00.103239.448.7BR-mag: 1.56; taxonomy: IR MPC  · JPL

1997

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1997 CW298 February 1997 Mauna Kea Obs. ( 568 )237 plutino?39.40.081936.342.5— MPC  · JPL
1997 GA453 April 1997 B. Gladman (568)98 cubewano (hot)47.00.17838.955.0— MPC  · JPL
1997 QH427 August 1997 D. C. Jewitt
C. Trujillo
J. X. Luu
K. Berney (568)		204cubewano (hot)43.00.091339.246.7BR-mag: 1.68; taxonomy: RR MPC  · JPL
1997 RL135 September 1997 Palomar Obs. ( 675 )43cubewano?44.50.00644.544.5— MPC  · JPL
1997 RX97 September 1997 B. Gladman (675)91other TNO41.80.053039.744.0— MPC  · JPL
1997 RY66 September 1997 La Palma Obs. ( 950 )162 cubewano (hot)41.40.001241.441.4— MPC  · JPL
1997 TX85 October 1997 Palomar Obs. ( 675 )94 plutino?39.30.19932.046.6— MPC  · JPL
1997 UG2526 October 1997 La Palma Obs. ( 950 )68 cubewano?43.30.00143.343.3— MPC  · JPL

1998

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
1998 FS14423 March 1998Northfield Mount Hermon School ( 807 )235 cubewano (hot)41.60.021040.642.5BR-mag: 1.53; taxonomy: IR MPC  · JPL
1998 HL15129 April 1998 D. C. Jewitt
J. X. Luu
C. Trujillo
D. J. Tholen ( 568 )		100other TNO40.70.092837.244.3BR-mag: 1.06 MPC  · JPL
1998 HN15121 April 1998J. Kormendy
R. Wainscoat
D. J. Tholen
D. C. Jewitt (568)		91other TNO37.90.062535.840.0— MPC  · JPL
1998 HO15122 April 1998R. Wainscoat
J. Kormendy
D. C. Jewitt
J. X. Luu (568)		95other TNO41.30.101737.345.2— MPC  · JPL
1998 HR15128 April 1998 Mauna Kea Obs. (568)65 cubewano?45.50.12739.951.1— MPC  · JPL
1998 KD6629 May 1998 Cerro Tololo Obs. ( 807 )57cubewano?43.10.05540.945.3— MPC  · JPL
1998 KE6629 May 1998Cerro Tololo Obs. (807)54cubewano?42.10.00342.142.1— MPC  · JPL
1998 KF6629 May 1998Cerro Tololo Obs. (807)52 plutino?39.50.21631.147.9— MPC  · JPL
1998 KG6629 May 1998Cerro Tololo Obs. (807)57 cubewano?45.20.00445.245.2— MPC  · JPL
1998 KS6529 May 1998 G. Bernstein (807)98cubewano (cold)44.20.04142.346.0BR-mag: 1.73; taxonomy: RR-IR MPC  · JPL
1998 KY6129 May 1998G. Bernstein (807)115cubewano (cold)44.70.04243.046.5— MPC  · JPL
1998 UR4322 October 1998 M. W. Buie ( 695 )103 plutino 39.40.22930.848.1BR-mag: 1.27; taxonomy: BR MPC  · JPL
1998 WS3118 November 1998M. W. Buie (695)105plutino39.40.20731.447.3BR-mag: 1.32; taxonomy: IR-BR MPC  · JPL
1998 WV2418 November 1998M. W. Buie (695)104other TNO39.00.04237.440.6BR-mag: 1.27; taxonomy: BR; binary: 91 km MPC  · JPL
1998 WV3119 November 1998M. W. Buie (695)150 plutino 39.30.27628.650.1BR-mag: 1.31; taxonomy: BR MPC  · JPL
1998 WW31 18 November 1998M. W. Buie (695)148 cubewano (hot)44.70.09740.748.6albedo: 0.054; binary: 123 km MPC  · JPL
1998 WX2418 November 1998M. W. Buie (695)152cubewano (cold)43.30.04141.545.1BR-mag: 1.79; taxonomy: RR MPC  · JPL
1998 WY3118 November 1998M. W. Buie (695)132cubewano (cold)45.00.11239.950.2— MPC  · JPL
1998 WZ2418 November 1998 Kitt Peak Obs. (695)113 plutino?39.50.18532.446.6— MPC  · JPL
1998 WZ3119 November 1998 M. W. Buie (695)108plutino39.40.171532.846.1BR-mag: 1.26; taxonomy: BB-BR MPC  · JPL

1999–2007

2008

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2008 AP1186 January 2008 Mauna Kea Obs. ( 568 )95 cubewano?44.10.16136.951.3— MPC  · JPL
2008 AQ1186 January 2008 P. A. Wiegert (568)257other TNO41.30.062538.943.6— MPC  · JPL
2008 AU1388 January 2008 Mauna Kea Obs. (568)254 centaur 32.30.384320.144.5— MPC  · JPL
2008 JO4111 May 2008Mauna Kea Obs. (568)79 SDO 88.30.554939.9137— MPC  · JPL
2008 LD187 June 2008Mauna Kea Obs. (568)91other TNO40.20.301528.052.5— MPC  · JPL
2008 UA33226 October 2008 L. H. Wasserman ( 807 )207 res  · 1:4 76.80.523136.9117— MPC  · JPL
2008 UB33226 October 2008 Cerro Tololo Obs. (807)197 plutino?39.50.243329.949.1— MPC  · JPL

2009–2018


2019

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2019 AC7711 January 2019 Cerro Tololo Obs. ( 807 )181 SDO 57.10.381235.378.9— MPC  · JPL
2019 EA56 March 2019Cerro Tololo Obs. (807)171SDO69.80.452838.2101— MPC  · JPL
2019 EB54 March 2019Cerro Tololo Obs. (807)155SDO52.30.32835.668.9— MPC  · JPL
2019 ET55 March 2019 Mauna Kea Obs. ( 568 )187SDO52.40.261238.966.0— MPC  · JPL
2019 EU5 6 January 2016Mauna Kea Obs. (568)198 EDDO 9730.951846.71900 ETNO MPC  · JPL
2019 EV55 March 2019Mauna Kea Obs. (568)117 SDO 55.70.43931.779.8— MPC  · JPL
2019 GJ235 April 2019Korea Microlensing Telescope Network-CTIO ( W93 )130 cubewano (cold)43.70.08140.447.0— MPC  · JPL
2019 GZ1294 April 2019 Cerro Tololo Obs. ( 807 )146 SDO 61.80.36939.384.3— MPC  · JPL
2019 QQ828 August 2019 Pan-STARRS ( F51 )10 centaur 61.80.89246.8117— MPC  · JPL
2019 RO44 September 2019 Lowell Discovery Tel. ( G37 )164other TNO42.00.172034.749.3— MPC  · JPL
2019 SJ18726 September 2019 Cerro Tololo Obs. ( 807 )192 SDO 74.50.502136.9112— MPC  · JPL
2019 SS14924 September 2019Cerro Tololo Obs. (807)213SDO1190.701535.4203— MPC  · JPL
2019 TX77 October 2019 Pan-STARRS ( F51 )10 centaur 33.20.8056.659.9— MPC  · JPL
2019 UH1227 October 2019 Pan-STARRS 2 ( F52 )40centaur52.90.85477.998.0— MPC  · JPL

2020

2021

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2021 CP57 February 2021 Pan-STARRS ( F51 )20 centaur 3320.97910.6654— MPC  · JPL
2021 DM1517 February 2021 Mauna Kea Obs. ( 568 )87 cubewano?45.40.03243.947.0 binary: 70 km MPC  · JPL
2021 DN1517 February 2021Mauna Kea Obs. (568)98cubewano?43.80.04341.945.7 binary: 93 km MPC  · JPL
2021 DO1516 February 2021Mauna Kea Obs. (568)208other TNO50.90.182341.660.2— MPC  · JPL
2021 DP1516 February 2021Mauna Kea Obs. (568)214 SDO 90.00.66430.8149— MPC  · JPL
2021 DQ1516 February 2021Mauna Kea Obs. (568)307 centaur 79.40.65327.9131— MPC  · JPL
2021 DR15 10 March 2005Apache Point-Sloan Digital Sky Survey ( 645 )713 SDO 67.20.443137.896.5— MPC  · JPL
2021 DS1517 February 2021 Mauna Kea Obs. ( 568 )144 cubewano?43.30.05341.245.4 binary: 119 km MPC  · JPL
2021 DK1817 February 2021 Mauna Kea Obs. ( 568 ) ETNO 731.6330.93915.45044.4981418 MPC  · JPL
2021 EE445 March 2021 Lowell Discovery Tel. ( G37 )279 centaur?42.40.34827.956.9— MPC  · JPL
2021 GU1225 April 2021Korea Microlensing Telescope Network-CTIO ( W93 )90 cubewano?60.50.331240.980.1— MPC  · JPL
2021 GW12212 April 2021Korea Microlensing Telescope Network-CTIO (W93)82 cubewano?42.60.07139.545.8— MPC  · JPL
2021 RR205 5 September 2021 Mauna Kea Obs. 200 sednoid 990.90.9437.64455.5411926— MPC  · JPL

2022

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2022 FA712 April 2021Korea Microlensing Telescope Network-CTIO ( W93 )202other TNO44.00.311530.557.5— MPC  · JPL
2022 FR61 March 2020Korea Microlensing Telescope Network-CTIO (W93)112 cubewano?44.10.08740.847.5— MPC  · JPL
2022 GP412 April 2021Korea Microlensing Telescope Network-CTIO (W93)81 cubewano?43.60.121038.548.8— MPC  · JPL
2022 GY316 April 2021Korea Microlensing Telescope Network-CTIO (W93)114 cubewano?42.70.14236.748.6— MPC  · JPL
2022 GZ316 April 2021Korea Microlensing Telescope Network-CTIO (W93)105 cubewano?41.60.071638.544.8— MPC  · JPL

2023

Designation First Observed (discovered) D (km)Orbital descriptionRemarksRefs
Date Observer
(Site)		Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
2023 DP519 February 2023 Mount Lemmon Survey ( G96 ) damocloid 93.370.95118.44.8181.94— MPC  · JPL

Ignored objects

The Minor Planet Center does not include the following 111 objects with a semi-major axis larger than that of Neptune in its respective lists (see § top). [2] [3] [lower-alpha 1] The data is sourced from the List of Known Trans-Neptunian Objects at Johnston's Archive. [1]

Designation D (km)Orbital descriptionRemarksRefs
Class a
(AU)		 e i
(°)		 q
(AU)		 Q
(AU)
(65407) 2002 RP120 15 damocloid 53.710.9119.382.4104.9albedo: 0.098; BR-mag: 1.37 MPC  · JPL
385571 Otrera 70 NT 30.270.01.4329.331.2— MPC  · JPL
385695 Clete 91 NT 30.240.05.2428.631.8— MPC  · JPL
(523794) 2015 RR245 542 res  · 2:9 82.520.57.5434.2130.8— MPC  · JPL
(530664) 2011 SO277 118 NT 30.300.09.6430.030.5— MPC  · JPL
(606187) 2017 QO33 11 damocloid 34.670.8148.844.964.4— MPC  · JPL
1996 PW 10 damocloid 269.670.930.092.4536.8— MPC  · JPL
2000 AB229 10 damocloid 52.240.968.282.2102.1— MPC  · JPL
2000 KP65 48 damocloid 89.440.945.543.3175.5— MPC  · JPL
(612243) 2001 QR322 132 NT 30.360.01.3229.431.3albedo: 0.058 MPC  · JPL
2002 AR91 4 damocloid 75.180.917.582.6147.7— MPC  · JPL
2002 CP154 209other TNO51.800.11.4741.961.7— MPC  · JPL
2002 RN109 5 damocloid 598.670.958.492.61194.6— MPC  · JPL
2003 UY283 5 centaur 33.450.818.903.563.4— MPC  · JPL
2004 CM111 8 centaur 33.180.84.664.961.4— MPC  · JPL
2004 NN8 5 damocloid 100.790.9165.582.3199.2— MPC  · JPL
2005 OE 11 damocloid 63.270.967.503.0123.4— MPC  · JPL
2005 TN53 66 NT 30.220.024.9528.232.2— MPC  · JPL
2005 VX3 9 damocloid 769.730.9112.444.11535.3— MPC  · JPL
2006 EX52 7 damocloid 42.060.9150.262.581.5— MPC  · JPL
2006 LM1 7 damocloid 37.180.9172.143.770.6— MPC  · JPL
(613490) 2006 RJ103 127 NT 30.130.08.1729.330.9BR-mag: 1.31 MPC  · JPL
2007 DA61 6 damocloid 433.780.976.492.6864.9— MPC  · JPL
2008 BN18 11 damocloid 35.000.928.732.667.3— MPC  · JPL
2009 DD47 4 damocloid 47.580.9107.452.292.9— MPC  · JPL
2009 WX199 1.1 damocloid 31.350.98.741.461.3— MPC  · JPL
2010 CG55 10 damocloid 31.650.9146.122.860.4albedo: 0.048 MPC  · JPL
2010 DC39 2.3 damocloid 108.390.910.541.8214.9— MPC  · JPL
2010 EX175 1 damocloid 49.290.929.252.695.9— MPC  · JPL
2010 GW147 16 centaur 176.570.999.895.3347.7albedo: 0.037 MPC  · JPL
2010 GW64 6 damocloid 62.300.9105.233.6120.9albedo: 0.047 MPC  · JPL
2010 JB184 1 unusual 44.680.918.693.086.3— MPC  · JPL
2010 JH124 7 damocloid 70.040.953.362.6137.4albedo: 0.052 MPC  · JPL
2010 LN135 9 damocloid 2901.800.964.701.75801.8— MPC  · JPL
2010 TT191 115 NT 30.110.04.2828.032.2— MPC  · JPL
2011 HM102 87 NT 30.300.029.3427.732.8BR-mag: 1.13 MPC  · JPL
2011 OR17 15 damocloid 292.270.9110.383.1581.4— MPC  · JPL
2011 WS41 1.9 damocloid 37.500.9141.662.072.9— MPC  · JPL
2012 DT42 1.7 damocloid 45.110.91.171.488.8— MPC  · JPL
2012 HD2 5 damocloid 62.520.9146.712.5122.5— MPC  · JPL
2012 KA51 19 damocloid 501.790.970.904.8998.7— MPC  · JPL
2012 UD185 126 NT 30.270.028.3029.031.5— MPC  · JPL
2012 UV177 58 NT 30.120.020.8527.932.3— MPC  · JPL
2013 BN27 2.4 damocloid 59.070.9101.801.5116.5— MPC  · JPL
2013 DG4 2.6 damocloid 136.080.95.291.3270.8— MPC  · JPL
2013 HS150 2.6 damocloid 62.510.997.112.8122.2— MPC  · JPL
2013 KY18 182 NT 30.260.16.6626.534.0— MPC  · JPL
2013 LD16 4 damocloid 81.200.9154.642.5159.8BR-mag: 1.30 MPC  · JPL
2013 RC158 70 NT 30.190.07.4528.631.7— MPC  · JPL
2013 RL124 72 NT 30.210.010.1229.331.0— MPC  · JPL
2013 SM99 1.9 unusual 34.100.914.293.065.1— MPC  · JPL
2013 TK227 50 NT 30.230.018.6127.732.6— MPC  · JPL
2013 TZ187 96 NT 30.240.013.1428.232.2— MPC  · JPL
2013 VX30 91 NT 30.170.031.2127.532.7— MPC  · JPL
2014 CW14 9 damocloid 32.790.8170.754.361.2BR-mag: 1.38 MPC  · JPL
2014 MH55 12 damocloid 44.840.992.344.585.1— MPC  · JPL
2014 QO441 90 NT 30.210.118.8427.133.2— MPC  · JPL
2014 QP441 57 NT 30.190.019.4128.132.2— MPC  · JPL
2014 RO74 88 NT 30.140.029.5128.631.6— MPC  · JPL
2014 SC374 96 NT 30.160.033.6727.233.0— MPC  · JPL
2014 UU240 96 NT 30.170.035.7528.831.5— MPC  · JPL
2014 XS3 6 damocloid 72.010.9101.533.2140.7— MPC  · JPL
2014 YB92 79 NT 30.270.030.8227.333.2— MPC  · JPL
2015 FK37 8 damocloid 456.250.9156.124.9907.5— MPC  · JPL
2015 RK245 8 damocloid 81.070.991.782.7159.3— MPC  · JPL
2015 RL277 3 centaur 35.020.83.115.264.8— MPC  · JPL
2015 RW277 38 NT 30.160.030.7527.932.3— MPC  · JPL
2015 TN178 5 damocloid 54.150.991.212.3105.9— MPC  · JPL
2015 TS350 13 centaur 144.820.957.955.0284.5— MPC  · JPL
2015 VU207 146 NT 30.190.038.9329.231.1— MPC  · JPL
2015 VV165 72 NT 30.170.016.8427.532.7— MPC  · JPL
2015 VW165 87 NT 30.160.05.0028.631.6— MPC  · JPL
2015 VX165 61 NT 30.110.017.1227.932.3— MPC  · JPL
2015 XR384 4 damocloid 36.260.9157.483.568.9— MPC  · JPL
2016 AT281 6 damocloid 62.740.922.172.6122.7— MPC  · JPL
2016 CO264 3 damocloid 47.350.9129.743.091.7— MPC  · JPL
2016 EJ203 1.5 damocloid 66.080.9170.962.7129.4— MPC  · JPL
2016 GM83 1.3 damocloid 138.080.93.461.5274.6— MPC  · JPL
2016 PN66 13 damocloid 31.040.9105.222.959.1— MPC  · JPL
2016 UN232 4 unusual 30.390.811.174.156.6— MPC  · JPL
2016 US109 2.3 damocloid 35.620.987.271.869.4— MPC  · JPL
2017 CW32 5 damocloid 182.370.9152.432.9361.8— MPC  · JPL
2017 EM4 4 damocloid 33.090.983.422.663.5— MPC  · JPL
2017 GD8 1.9 damocloid 43.280.974.862.284.2— MPC  · JPL
2017 JB6 6 damocloid 32.900.8160.743.861.9— MPC  · JPL
2017 MB7 9 damocloid 3549.250.955.714.47094.0— MPC  · JPL
2017 MZ4 13 damocloid 67.560.965.823.1131.9— MPC  · JPL
2017 OX68 1.7 damocloid 58.830.994.751.7115.9— MPC  · JPL
2017 SN33 1.6 damocloid 249.220.9152.061.8496.5— MPC  · JPL
2017 SZ118 1.1 damocloid 34.050.92.461.566.5— MPC  · JPL
2017 UR52 0.3 Amor 292.680.9108.281.2584.1— MPC  · JPL
2017 UW51 5 damocloid 125.350.9144.203.1247.5— MPC  · JPL
2017 UX51 35 centaur 30.100.790.467.652.5— MPC  · JPL
2017 YL4 7 damocloid 147.730.988.984.2291.1— MPC  · JPL
2018 DE4 2.2 damocloid 31.830.981.342.361.2— MPC  · JPL
2018 DF4 3 damocloid 95.000.968.211.6188.4— MPC  · JPL
2018 KH3 11 damocloid 93.450.946.863.7183.2— MPC  · JPL
2018 MP8 5 damocloid 377.260.968.303.8750.6— MPC  · JPL
2018 SQ13 5 damocloid 154.170.990.972.9305.3— MPC  · JPL
2019 EJ3 0.18 Amor 102.920.9139.751.0204.7— MPC  · JPL
2019 YJ6 2.5 damocloid 37.220.922.002.571.8— MPC  · JPL
2020 KU7 6 damocloid 34.860.8103.844.165.5— MPC  · JPL
2020 ML1 1.8 damocloid 54.980.982.462.5107.4— MPC  · JPL
2020 QN6 7 damocloid 648.830.976.834.81292.8— MPC  · JPL
2021 DL1 9 damocloid 35.370.8148.553.966.8— MPC  · JPL
2021 GQ57 3 damocloid 86.770.9125.103.4170.1— MPC  · JPL
2021 PN72 25 damocloid 318.110.984.904.5631.6— MPC  · JPL
2021 QM45 6 damocloid 368.620.922.822.7734.4— MPC  · JPL
2021 RM114 2.7 damocloid 114.600.9103.174.0225.1— MPC  · JPL
2021 UL19 1.0 damocloid 37.710.9154.921.873.5— MPC  · JPL
2021 XS6 3 damocloid 39.020.896.913.974.1— MPC  · JPL
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See also

Notes

  1. 1 2 According to Johnston's Archive, [lower-alpha 2] there are 50+ objects with a semi-major axis larger than 30.1 AU that are excluded from the two MPC sources. These ignored objects are the damocloids and the Neptune trojans, as well as three unusual objects 2003 UY283 ( MPC / JPL ), 2004 CM111 ( MPC / JPL ) and 2015 RL277 ( MPC / JPL ).

Related Research Articles

A trans-Neptunian object (TNO), also written transneptunian object, is any minor planet in the Solar System that orbits the Sun at a greater average distance than Neptune, which has an orbital semi-major axis of 30.1 astronomical units (au).

(65407) 2002 RP120 (provisional designation 2002 RP120) is a trans-Neptunian object and damocloid from the outer Solar System. Its orbit is retrograde and comet-like, and has a high eccentricity. It was discovered on 4 September 2002 by astronomers with the LONEOS survey at Anderson Mesa Station, Arizona, in the United States. The unusual object measures approximately 14.6 kilometers (9.1 miles) in diameter and is likely elongated in shape. It is a slow rotator and potentially a tumbler as well. The object was probably ejected from the ecliptic by Neptune.

<span class="nowrap">(84522) 2002 TC<sub>302</sub></span> Large trans-Neptunian object

(84522) 2002 TC302 (provisional designation 2002 TC302) is a mid-sized trans-Neptunian object located in the outermost region of the Solar System. It was discovered on 9 October 2002, by American astronomers Mike Brown, Chad Trujillo and David Rabinowitz at the Palomar Observatory in California. The resonant trans-Neptunian object stays in a 2:5 resonance with Neptune. It has a reddish color, a rotation period of 56.1 hours and measures at least 500 kilometers (310 miles) in diameter.

(119070) 2001 KP77 (provisional designation 2001 KP77) is a resonant trans-Neptunian object in the Kuiper belt, a circumstellar disc located in the outermost region of the Solar System. It was discovered on 23 May 2001, by American astronomer Marc Buie at the Cerro Tololo Observatory in Chile. The object is locked in a 4:7 orbital resonance with Neptune. It has a red surface color and measures approximately 176 kilometers (110 miles) in diameter. As of 2021, it has not been named.

<span class="nowrap">(15875) 1996 TP<sub>66</sub></span> Resonant trans-Neptunian object

(15875) 1996 TP66 (provisional designation 1996 TP66) is a resonant trans-Neptunian object of the plutino population, located in the outermost region of the Solar System, approximately 154 kilometers (96 miles) in diameter. It was discovered on 11 October 1996, by astronomers Jane Luu, David C. Jewitt and Chad Trujillo at the Mauna Kea Observatories, Hawaii, in the United States. The very reddish RR-type with a highly eccentric orbit has been near its perihelion around the time of its discovery. This minor planet was numbered in 2000 and has since not been named. It is probably not a dwarf planet candidate.

<span class="nowrap">(42301) 2001 UR<sub>163</sub></span>

(42301) 2001 UR163 (provisional designation 2001 UR163) is a resonant trans-Neptunian object and possible dwarf planet located in the outermost region of the Solar System. The object measures approximately 352 kilometers (220 miles) in diameter with a high albedo and stays in an uncommon orbital resonance (4:9) with Neptune. It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson, Arizona, United States. As of 2021, it has not been named.

<span class="nowrap">(44594) 1999 OX<sub>3</sub></span>

(44594) 1999 OX3 is an eccentric trans-Neptunian object with a centaur-like orbit from the outer Solar System, approximately 150 kilometers in diameter. It was discovered on 21 July 1999, by astronomers John Kavelaars, Brett Gladman, Matthew Holman and Jean-Marc Petit at Mauna Kea Observatories, Hawaii, United States.

<span class="nowrap">(528381) 2008 ST<sub>291</sub></span>

(528381) 2008 ST291, provisional designation 2008 ST291, is a 1:6 resonant trans-Neptunian object located in the outermost region of the Solar System that takes almost a thousand years to complete an orbit around the Sun. It was discovered on 24 September 2008 by American astronomers Megan Schwamb, Michael Brown and David Rabinowitz at the Palomar Observatory in California, with no known earlier precovery images.

(307463) 2002 VU130 (provisional designation 2002 VU130) is a trans-Neptunian object, located in the circumstellar disc of the Kuiper belt in the outermost region of the Solar System. The resonant trans-Neptunian object belongs to the population of plutinos and measures approximately 253 kilometers (160 miles) in diameter. It was discovered on 7 November 2002, by American astronomer Marc Buie at the Kitt Peak Observatory near Tucson, Arizona. The object has not been named yet.

(148975) 2001 XA255, provisional designation: 2001 XA255, is a dark minor planet in the outer Solar System, classified as centaur, approximately 38 kilometers (24 miles) in diameter. It was discovered on 9 December 2001, by David C. Jewitt, Scott S. Sheppard, and Jan Kleyna observing from the Mauna Kea Observatory. The object is currently trapped in a 1:1 mean-motion resonance with Neptune following a path of the horseshoe type.

(523671) 2013 FZ27 (provisional designation 2013 FZ27) is a trans-Neptunian object located in the Kuiper belt in the outermost region of the Solar System, approximately 570 kilometers (350 miles) in diameter. It was discovered on 16 March 2013, by American astronomers Scott Sheppard and Chad Trujillo at the CTIO in Chile. Numbered in 2018, this minor planet has not been named.

<span class="nowrap">(127546) 2002 XU<sub>93</sub></span>

(127546) 2002 XU93, provisional designation 2002 XU93, is a trans-Neptunian object and centaur on highly inclined and eccentric orbit in the outer region of the Solar System. It measures approximately 170 kilometers (110 mi) in diameter and is one of few objects with such an unusual orbit. It was discovered on 4 December 2002, by American astronomer Marc Buie at the Kitt Peak National Observatory in Arizona, United States.

(527603) 2007 VJ305 (provisional designation 2007 VJ305) is an extreme trans-Neptunian object from the extended scattered disc on a highly eccentric orbit in the outermost region of the Solar System. It measures approximately 250 kilometers (160 miles) in diameter and is "possibly" a dwarf planet. The rather reddish extended scattered disc object belongs to the group of extreme trans-Neptunian objects. It was discovered on 4 November 2007 by astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at the Apache Point Observatory in New Mexico, United States.

(508338) 2015 SO20 is an extreme trans-Neptunian object and extended scattered disc object from the outermost region of the Solar System, approximately 220 kilometers (140 miles) in diameter.

(523727) 2014 NW65 (provisional designation 2014 NW65) is a large centaur from the outer Solar System, approximately 220 kilometers (140 miles) in diameter. It was discovered on 14 July 2010 by astronomers with the Pan-STARRS-1 survey at Haleakala Observatory, Hawaii, in the United States. The minor planet was numbered in 2018 and has not been named.

(342842) 2008 YB3, provisional designation: 2008 YB3, is a sizable centaur and retrograde damocloid from the outer Solar System, approximately 67 kilometers (42 miles) in diameter. It was discovered on 18 December 2008, by astronomers with the Siding Spring Survey at the Siding Spring Observatory in Australia. The minor planet was numbered in 2012 and has since not been named.

(495603) 2015 AM281 (provisional designation 2015 AM281) is a resonant trans-Neptunian object in the outermost region of the Solar System, guesstimated at approximately 470 kilometers (290 miles) in diameter. It was discovered on 13 March 2010, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.

References

  1. 1 2 3 4 "List of Known Trans-Neptunian Objects". Johnston's Archive. 2 January 2022. Retrieved 16 April 2022.
  2. 1 2 3 4 "List Of Transneptunian Objects". Minor Planet Center. 16 April 2022.
  3. 1 2 3 4 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 16 April 2022.
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