List of unnumbered minor planets: 2001 U

This is a partial list of unnumbered minor planets for principal provisional designations assigned during 16–31 October 2001. , a total of 115 bodies remain unnumbered for this period. Objects for this year are listed on the following pages: A–E · Fi · Fii · G–O · P–R · S · T · U · V–W and X–Y. Also see previous and next year.

U

|- id="2001 UO" bgcolor=#FFC2E0 | 9 || 2001 UO || APO || 24.1 || data-sort-value="0.054" | 54 m || single || 2 days || 18 Oct 2001 || 14 || align=left | Disc.: LPL/Spacewatch II || |- id="2001 UP" bgcolor=#FFC2E0 | 3 || 2001 UP || ATE || 25.7 || data-sort-value="0.026" | 26 m || single || 4 days || 20 Oct 2001 || 39 || align=left | Disc.: LINEAR || |- id="2001 UT" bgcolor=#FA8072 | 0 || 2001 UT || MCA || 18.5 || data-sort-value="0.59" | 590 m || multiple || 2001–2015 || 03 Dec 2015 || 109 || align=left | Disc.: LINEAR || |- id="2001 UW" bgcolor=#FA8072 | 0 || 2001 UW || MCA || 18.95 || data-sort-value="0.48" | 480 m || multiple || 2001–2021 || 01 Nov 2021 || 35 || align=left | Disc.: LINEAR || |- id="2001 UW2" bgcolor=#FA8072 | 4 || || MCA || 20.69 || data-sort-value="0.24" | 240 m || multiple || 2001-2015 || 21 Jan 2015 || 36 || align=left | Disc.: Spacewatch || |- id="2001 UT4" bgcolor=#FA8072 | 0 || || MCA || 18.2 || data-sort-value="0.96" | 960 m || multiple || 2001–2019 || 15 Jan 2019 || 75 || align=left | Disc.: AMOS || |- id="2001 UX4" bgcolor=#FFC2E0 | 0 || || APO || 19.3 || data-sort-value="0.49" | 490 m || multiple || 2001–2021 || 03 Oct 2021 || 209 || align=left | Disc.: LINEAR || |- id="2001 UZ4" bgcolor=#FFC2E0 | 7 || || AMO || 20.6 || data-sort-value="0.27" | 270 m || single || 13 days || 21 Oct 2001 || 24 || align=left | Disc.: LINEAR || |- id="2001 UB5" bgcolor=#FFC2E0 | 9 || || AMO || 21.9 || data-sort-value="0.15" | 150 m || single || 3 days || 21 Oct 2001 || 18 || align=left | Disc.: LPL/Spacewatch II || |- id="2001 UC5" bgcolor=#FFC2E0 | 5 || || APO || 21.3 || data-sort-value="0.20" | 200 m || single || 6 days || 26 Oct 2001 || 70 || align=left | Disc.: LINEARAMO at MPC || |- id="2001 UD5" bgcolor=#FFC2E0 | 7 || || APO || 22.7 || data-sort-value="0.10" | 100 m || single || 23 days || 11 Nov 2001 || 31 || align=left | Disc.: NEAT || |- id="2001 UF5" bgcolor=#FFC2E0 | 4 || || APO || 22.7 || data-sort-value="0.10" | 100 m || single || 19 days || 26 Oct 2001 || 48 || align=left | Disc.: LINEAR || |- id="2001 US7" bgcolor=#d6d6d6 | 0 || || MBA-O || 16.87 || 2.4 km || multiple || 2001–2023 || 13 Jul 2023 || 58 || align=left | Disc.: LINEARAlt.: 2012 TO232 || |- id="2001 UB10" bgcolor=#FA8072 | 0 || || MCA || 17.9 || data-sort-value="0.78" | 780 m || multiple || 2001–2018 || 13 Nov 2018 || 39 || align=left | Disc.: LINEARAlt.: 2009 KR6 || |- id="2001 UN16" bgcolor=#FFC2E0 | 7 || || APO || 23.4 || data-sort-value="0.074" | 74 m || single || 31 days || 21 Nov 2001 || 17 || align=left | Disc.: LINEAR || |- id="2001 UO16" bgcolor=#FFE699 | 4 || || Asteroid || 17.7 || 1.6 km || single || 62 days || 14 Dec 2001 || 111 || align=left | Disc.: LINEARMCA at MPC || |- id="2001 UP16" bgcolor=#FFC2E0 | 1 || || AMO || 20.7 || data-sort-value="0.26" | 260 m || multiple || 2001–2012 || 13 Feb 2012 || 73 || align=left | Disc.: LINEAR || |- id="2001 UQ16" bgcolor=#FFC2E0 | 0 || || AMO || 21.54 || data-sort-value="0.20" | 200 m || multiple || 2001-2024 || 09 Nov 2024 || 47 || align=left | Disc.: LINEAR || |- id="2001 UT16" bgcolor=#FFC2E0 | 7 || || AMO || 25.5 || data-sort-value="0.028" | 28 m || single || 1 day || 25 Oct 2001 || 9 || align=left | Disc.: LINEAR || |- id="2001 UU16" bgcolor=#FFC2E0 | 7 || || APO || 24.9 || data-sort-value="0.037" | 37 m || single || 2 days || 26 Oct 2001 || 24 || align=left | Disc.: SpacewatchAMO at MPC || |- id="2001 UA17" bgcolor=#C2E0FF | 9 || || TNO || 7.07 || 164 km || single || 4 days || 21 Oct 2001 || 8 || align=left | Disc.: La Silla Obs.LoUTNOs, cubewano? || |- id="2001 UB17" bgcolor=#C2E0FF | E || || TNO || 8.0 || 119 km || single || 1 day || 18 Oct 2001 || 6 || align=left | Disc.: La Silla Obs.LoUTNOs, plutino? || |- id="2001 UC17" bgcolor=#C2E0FF | E || || TNO || 7.6 || 143 km || single || 1 day || 18 Oct 2001 || 5 || align=left | Disc.: La Silla Obs.LoUTNOs, plutino? || |- id="2001 UW17" bgcolor=#FFC2E0 | 1 || || AMO || 20.5 || data-sort-value="0.28" | 280 m || multiple || 2001–2014 || 23 Apr 2014 || 69 || align=left | Disc.: NEAT || |- id="2001 UX17" bgcolor=#FA8072 | 1 || || MCA || 17.8 || data-sort-value="0.82" | 820 m || multiple || 2001–2017 || 19 May 2017 || 34 || align=left | Disc.: NEAT || |- id="2001 UB18" bgcolor=#FA8072 | 0 || || MCA || 17.72 || 1.6 km || multiple || 1980–2022 || 03 Dec 2022 || 349 || align=left | Disc.: Palomar Obs.Alt.: 1980 WT2 || |- id="2001 UD18" bgcolor=#FFC2E0 | 7 || || APO || 27.6 || data-sort-value="0.011" | 11 m || single || 1 day || 27 Oct 2001 || 9 || align=left | Disc.: SpacewatchAMO at MPC || |- id="2001 UE18" bgcolor=#FFC2E0 | 8 || || AMO || 22.5 || data-sort-value="0.11" | 110 m || single || 3 days || 29 Oct 2001 || 15 || align=left | Disc.: NEAT || |- id="2001 UG18" bgcolor=#FFC2E0 | 0 || || AMO || 20.7 || data-sort-value="0.26" | 260 m || multiple || 2001–2016 || 06 Dec 2016 || 158 || align=left | Disc.: LINEAR || |- id="2001 UN18" bgcolor=#C2E0FF | 3 || || TNO || 6.5 || 167 km || multiple || 2001–2013 || 06 Oct 2013 || 15 || align=left | Disc.: Kitt Peak Obs.LoUTNOs, cubewano (cold) || |- id="2001 UP18" bgcolor=#C2E0FF | 4 || || TNO || 6.0 || 228 km || multiple || 2001–2019 || 27 Nov 2019 || 24 || align=left | Disc.: Kitt Peak Obs.LoUTNOs, twotino, BR-mag: 1.49; taxonomy: IR || |- id="2001 UO27" bgcolor=#FFC2E0 | 6 || || AMO || 19.8 || data-sort-value="0.39" | 390 m || single || 16 days || 12 Nov 2001 || 21 || align=left | Disc.: LINEAR || |- id="2001 UE40" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.89 || 1.5 km || multiple || 2001-2022 || 26 Dec 2022 || 86 || align=left | Disc.: LINEARAlt.: 2022 SU224 || |- id="2001 UN41" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.2 || 2.0 km || multiple || 2001–2019 || 21 Dec 2019 || 229 || align=left | Disc.: LINEAR || |- id="2001 UL42" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.4 || data-sort-value="0.62" | 620 m || multiple || 2001–2017 || 07 Nov 2017 || 78 || align=left | Disc.: LINEAR || |- id="2001 UJ58" bgcolor=#fefefe | 0 || || MBA-I || 18.6 || data-sort-value="0.57" | 570 m || multiple || 2001–2012 || 17 Nov 2012 || 52 || align=left | Disc.: LINEARAlt.: 2012 SA2 || |- id="2001 UW66" bgcolor=#fefefe | 1 || || MBA-I || 19.11 || data-sort-value="0.47" | 460 m || multiple || 2001–2023 || 12 Sep 2023 || 42 || align=left | Disc.: LINEAR || |- id="2001 UY66" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.8 || 1.2 km || multiple || 2001–2018 || 03 Oct 2018 || 47 || align=left | Disc.: LINEARAlt.: 2014 WS299 || |- id="2001 UL69" bgcolor=#fefefe | 1 || || MBA-I || 18.81 || data-sort-value="0.51" | 510 m || multiple || 2001–2019 || 24 Oct 2019 || 49 || align=left | Disc.: LPL/Spacewatch II || |- id="2001 UQ70" bgcolor=#fefefe | 0 || || MBA-I || 19.65 || data-sort-value="0.35" | 350 m || multiple || 2001–2020 || 22 Apr 2020 || 31 || align=left | Disc.: LPL/Spacewatch II || |- id="2001 UE78" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.93 || data-sort-value="0.77" | 770 m || multiple || 2001–2021 || 19 Apr 2021 || 45 || align=left | Disc.: LINEARAlt.: 2005 QL147 || |- id="2001 UX85" bgcolor=#fefefe | 0 || || MBA-I || 18.5 || data-sort-value="0.59" | 590 m || multiple || 2001–2019 || 25 Nov 2019 || 59 || align=left | Disc.: SpacewatchAlt.: 2015 OM42 || |- id="2001 UY87" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.3 || data-sort-value="0.84" | 840 m || multiple || 2001-2023 || 07 Dec 2023 || 45 || align=left | Disc.: Spacewatch || |- id="2001 UA90" bgcolor=#fefefe | 0 || || MBA-I || 18.9 || data-sort-value="0.49" | 490 m || multiple || 2001–2020 || 05 Dec 2020 || 43 || align=left | Disc.: SpacewatchAdded on 17 January 2021 || |- id="2001 UU92" bgcolor=#FFC2E0 | 0 || || AMO || 20.1 || data-sort-value="0.34" | 340 m || multiple || 2001–2019 || 05 Jan 2019 || 168 || align=left | Disc.: NEAT || |- id="2001 UB97" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.9 || 1.1 km || multiple || 2001–2018 || 10 Jul 2018 || 118 || align=left | Disc.: LINEARAlt.: 2014 SD148 || |- id="2001 UC101" bgcolor=#FA8072 | 1 || || MCA || 19.2 || data-sort-value="0.43" | 430 m || multiple || 2001–2017 || 20 Aug 2017 || 41 || align=left | Disc.: LINEAR || |- id="2001 UW102" bgcolor=#fefefe | 0 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 2001–2018 || 03 Nov 2018 || 60 || align=left | Disc.: LINEAR || |- id="2001 UN104" bgcolor=#E9E9E9 | – || || MBA-M || 17.4 || data-sort-value="0.98" | 980 m || single || 8 days || 25 Oct 2001 || 20 || align=left | Disc.: LINEAR || |- id="2001 UO111" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.1 || 1.0 km || multiple || 2001–2018 || 02 Nov 2018 || 47 || align=left | Disc.: LINEARAlt.: 2018 UB10 || |- id="2001 UK114" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.9 || data-sort-value="0.78" | 780 m || multiple || 2001–2020 || 27 Apr 2020 || 48 || align=left | Disc.: LINEAR || |- id="2001 UQ115" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.6 || 1.3 km || multiple || 2001–2018 || 30 Sep 2018 || 92 || align=left | Disc.: LINEARAlt.: 2014 US94 || |- id="2001 UC119" bgcolor=#FA8072 | 0 || || MCA || 17.95 || data-sort-value="0.82" | 800 m || multiple || 2001–2023 || 29 Mar 2023 || 92 || align=left | Disc.: LINEAR || |- id="2001 UG124" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.0 || 1.4 km || multiple || 2001–2019 || 23 Aug 2019 || 28 || align=left | Disc.: NEAT || |- id="2001 UP126" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.87 || 1.2 km || multiple || 2001-2023 || 09 Dec 2023 || 61 || align=left | Disc.: LINEAR || |- id="2001 UX131" bgcolor=#FA8072 | 1 || || MCA || 18.5 || data-sort-value="0.59" | 590 m || multiple || 2001–2012 || 05 Dec 2012 || 35 || align=left | Disc.: LINEARAlt.: 2012 TS302 || |- id="2001 UW138" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.2 || 2.0 km || multiple || 2001–2018 || 13 Mar 2018 || 55 || align=left | Disc.: LINEAR || |- id="2001 UX140" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.25 || data-sort-value="0.65" | 650 m || multiple || 2001-2022 || 29 Nov 2022 || 83 || align=left | Disc.: LINEAR || |- id="2001 UB143" bgcolor=#FA8072 | 0 || || MCA || 18.6 || data-sort-value="0.57" | 570 m || multiple || 2001–2015 || 31 Dec 2015 || 111 || align=left | Disc.: LINEARAlt.: 2008 SS245 || |- id="2001 UE147" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.07 || data-sort-value="0.75" | 750 m || multiple || 2001-2022 || 18 Dec 2022 || 73 || align=left | Disc.: LINEAR || |- id="2001 UQ163" bgcolor=#FFC2E0 | 2 || || AMO || 20.9 || data-sort-value="0.23" | 230 m || multiple || 2001–2017 || 13 Nov 2017 || 83 || align=left | Disc.: Spacewatch || |- id="2001 UX172" bgcolor=#FA8072 | 1 || || MCA || 19.10 || data-sort-value="0.64" | 640 m || multiple || 2001–2019 || 02 Jan 2019 || 55 || align=left | Disc.: NEAT || |- id="2001 UV193" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.1 || 2.1 km || multiple || 2001–2013 || 20 Jan 2013 || 25 || align=left | Disc.: NEAT || |- id="2001 UY198" bgcolor=#fefefe | 0 || || MBA-I || 19.2 || data-sort-value="0.43" | 430 m || multiple || 2001–2020 || 21 Jun 2020 || 43 || align=left | Disc.: NEAT || |- id="2001 UB201" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.6 || 1.3 km || multiple || 2001–2019 || 28 Dec 2019 || 39 || align=left | Disc.: NEATAlt.: 2014 QJ168 || |- id="2001 UJ206" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.0 || data-sort-value="0.75" | 750 m || multiple || 2001–2016 || 28 Mar 2016 || 49 || align=left | Disc.: Spacewatch || |- id="2001 UR208" bgcolor=#fefefe | 0 || || MBA-I || 18.6 || data-sort-value="0.57" | 570 m || multiple || 2001–2020 || 25 Dec 2020 || 46 || align=left | Disc.: LINEAR || |- id="2001 US208" bgcolor=#E9E9E9