List of unnumbered minor planets: 1999 U–Y

This is a partial list of unnumbered minor planets for principal provisional designations assigned between 16 October and 31 December 1999. , a total of 95 bodies remain unnumbered for this period. Objects for this year are listed on the following pages: A–R · S–T and U–Y. Also see previous and next year.

U

|- id="1999 UQ" bgcolor=#FFC2E0 | 0 || 1999 UQ || AMO || 21.88 || data-sort-value="0.16" | 160 m || multiple || 1999–2023 || 10 Jun 2023 || 113 || align=left | Disc.: LINEAR || |- id="1999 UR" bgcolor=#FFC2E0 | 1 || 1999 UR || APO || 21.5 || data-sort-value="0.18" | 180 m || multiple || 1999–2013 || 13 Feb 2013 || 76 || align=left | Disc.: LINEARPotentially hazardous object || |- id="1999 UZ5" bgcolor=#FFC2E0 | – || || APO || 21.8 || data-sort-value="0.16" | 160 m || single || 4 days || 04 Nov 1999 || 32 || align=left | Disc.: CSS || |- id="1999 UD18" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.5 || data-sort-value="0.59" | 590 m || multiple || 1999–2020 || 14 Nov 2020 || 34 || align=left | Disc.: Spacewatch || |- id="1999 UH20" bgcolor=#fefefe | 1 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 1999–2020 || 19 Oct 2020 || 97 || align=left | Disc.: Spacewatch || |- id="1999 UL31" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.42 || data-sort-value="0.59" | 590 m || multiple || 1999–2025 || 20 Feb 2025 || 58 || align=left | Disc.: SpacewatchAdded on 11 May 2021 || |- id="1999 UZ33" bgcolor=#fefefe | 0 || || MBA-I || 18.5 || data-sort-value="0.59" | 590 m || multiple || 1999–2020 || 27 Jan 2020 || 39 || align=left | Disc.: SpacewatchAlt.: 2007 YA17 || |- id="1999 UU39" bgcolor=#fefefe | 1 || || MBA-I || 19.21 || data-sort-value="0.39" | 430 m || multiple || 1999-2022 || 23 Oct 2022 || 55 || align=left | Disc.: Spacewatch Alt.: 2022 SZ26|| |- id="1999 UV39" bgcolor=#fefefe | 3 || || MBA-I || 19.3 || data-sort-value="0.41" | 410 m || multiple || 1999–2016 || 05 Nov 2016 || 27 || align=left | Disc.: Spacewatch || |- id="1999 UB41" bgcolor=#fefefe | 2 || || MBA-I || 18.6 || data-sort-value="0.57" | 570 m || multiple || 1999–2021 || 24 Sep 2021 || 40 || align=left | Disc.: Spacewatch || |- id="1999 UA58" bgcolor=#fefefe | 0 || || MBA-I || 19.04 || data-sort-value="0.46" | 460 m || multiple || 1999–2021 || 25 Nov 2021 || 78 || align=left | Disc.: SpacewatchAlt.: 2017 QX18 || |- id="1999 UP58" bgcolor=#fefefe | 3 || || MBA-I || 19.0 || data-sort-value="0.47" | 470 m || multiple || 1992–2017 || 13 Dec 2017 || 40 || align=left | Disc.: SpacewatchAlt.: 1992 WR7 || |- id="1999 UY58" bgcolor=#fefefe | 0 || || MBA-I || 18.85 || data-sort-value="0.50" | 500 m || multiple || 1999–2021 || 08 Dec 2021 || 54 || align=left | Disc.: Spacewatch || |- id="1999 UQ66" bgcolor=#fefefe | 0 || || MBA-I || 18.90 || data-sort-value="0.49" | 490 m || multiple || 1999–2021 || 07 Nov 2021 || 41 || align=left | Disc.: Spacewatch || |- id="1999 UT66" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.57 || data-sort-value="0.59" | 580 m || multiple || 1999–2023 || 10 Sep 2023 || 40 || align=left | Disc.: SpacewatchAdded on 22 July 2020 || |- id="1999 UU66" bgcolor=#fefefe | 2 || || MBA-I || 19.6 || data-sort-value="0.36" | 360 m || multiple || 1999–2020 || 23 Nov 2020 || 56 || align=left | Disc.: SpacewatchAdded on 17 January 2021 || |- id="1999 UA67" bgcolor=#E9E9E9

V

|- id="1999 VT" bgcolor=#FFC2E0 | 2 || 1999 VT || AMO || 19.7 || data-sort-value="0.41" | 410 m || multiple || 1999–2019 || 08 Nov 2019 || 175 || align=left | Disc.: CSS || |- id="1999 VL1" bgcolor=#FA8072 | 0 || || MCA || 19.69 || data-sort-value="0.28" | 410 m || multiple || 1999-2022 || 26 Nov 2022 || 109 || align=left | Disc.: CSS || |- id="1999 VQ5" bgcolor=#FA8072 | – || || MCA || 19.4 || data-sort-value="0.39" | 390 m || single || 10 days || 14 Nov 1999 || 78 || align=left | Disc.: LINEAR || |- id="1999 VN11" bgcolor=#FFC2E0 | 7 || || AMO || 20.3 || data-sort-value="0.31" | 310 m || single || 8 days || 14 Nov 1999 || 71 || align=left | Disc.: LINEAR || |- id="1999 VK12" bgcolor=#FFC2E0 | – || || APO || 23.7 || data-sort-value="0.065" | 65 m || single || 3 days || 12 Nov 1999 || 16 || align=left | Disc.: LINEAR || |- id="1999 VS14" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.41 || data-sort-value="0.87" | 870 m || multiple || 1999–2016 || 25 Oct 2016 || 26 || align=left | Disc.: Kitt Peak Obs.Added on 29 January 2022 || |- id="1999 VC16" bgcolor=#fefefe | 2 || || MBA-I || 18.7 || data-sort-value="0.54" | 540 m || multiple || 1999–2020 || 16 Nov 2020 || 69 || align=left | Disc.: SpacewatchAlt.: 2006 SN368 || |- id="1999 VP16" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.32 || 1.9 km || multiple || 1999–2021 || 06 Nov 2021 || 58 || align=left | Disc.: Spacewatch || |- id="1999 VU18" bgcolor=#fefefe | 0 || || MBA-I || 19.59 || data-sort-value="0.36" | 360 m || multiple || 1999–2021 || 30 Nov 2021 || 69 || align=left | Disc.: Spacewatch || |- id="1999 VU25" bgcolor=#FFC2E0 | 7 || || AMO || 23.8 || data-sort-value="0.062" | 62 m || single || 4 days || 15 Nov 1999 || 13 || align=left | Disc.: LINEAR || |- id="1999 VV25" bgcolor=#FFC2E0 | 7 || || APO || 25.1 || data-sort-value="0.034" | 34 m || single || 3 days || 17 Nov 1999 || 27 || align=left | Disc.: LINEAR || |- id="1999 VW25" bgcolor=#FFC2E0 | – || || ATE || 25.3 || data-sort-value="0.031" | 31 m || single || 3 days || 17 Nov 1999 || 31 || align=left | Disc.: LINEAR || |- id="1999 VX25" bgcolor=#FFC2E0 | 7 || || ATE || 26.7 || data-sort-value="0.016" | 16 m || single || 5 days || 20 Nov 1999 || 40 || align=left | Disc.: LINEAR || |- id="1999 VX39" bgcolor=#E9E9E9 | – || || MBA-M || 18.2 || data-sort-value="0.68" | 680 m || single || 8 days || 12 Nov 1999 || 9 || align=left | Disc.: Spacewatch || |- id="1999 VB41" bgcolor=#fefefe | 3 || || MBA-I || 19.0 || data-sort-value="0.47" | 470 m || multiple || 1999–2020 || 26 Sep 2020 || 40 || align=left | Disc.: SpacewatchAlt.: 2020 PJ36 || |- id="1999 VF73" bgcolor=#FA8072 | 0 || || MCA || 19.9 || data-sort-value="0.44" | 440 m || multiple || 1999–2020 || 12 Sep 2020 || 70 || align=left | Disc.: SpacewatchAlt.: 2013 AG150 || |- id="1999 VM74" bgcolor=#FA8072 | 0 || || MCA || 19.5 || data-sort-value="0.55" | 550 m || multiple || 1999–2024 || 30 Sep 2024 || 40 || align=left | Disc.: SpacewatchAdded on 17 June 2021Alt.: 2020 TJ43 || |- id="1999 VE76" bgcolor=#d6d6d6 | 1 || || HIL || 16.8 || 2.4 km || multiple || 1999–2015 || 06 Dec 2015 || 28 || align=left | Disc.: Spacewatch || |- id="1999 VX83" bgcolor=#fefefe | 2 || || MBA-I || 19.6 || data-sort-value="0.36" | 360 m || multiple || 1999–2020 || 17 Oct 2020 || 61 || align=left | Disc.: Spacewatch || |- id="1999 VM116" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.4 || data-sort-value="0.88" | 880 m || multiple || 1996–2021 || 30 Nov 2021 || 46 || align=left | Disc.: SpacewatchAdded on 24 December 2021 || |- id="1999 VP118" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.86 || data-sort-value="0.43" | 450 m || multiple || 1999–2024 || 02 Oct 2024 || 47 || align=left | Disc.: Spacewatch || |- id="1999 VU118" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.81 || 1.5 km || multiple || 1999–2022 || 04 Jan 2022 || 50 || align=left | Disc.: SpacewatchAlt.: 2015 UX37 || |- id="1999 VN121" bgcolor=#E9E9E9 | 1 || || MBA-M || 19.3 || data-sort-value="0.58" | 580 m || multiple || 1999–2021 || 26 Oct 2021 || 30 || align=left | Disc.: SpacewatchAdded on 29 January 2022 || |- id="1999 VO121" bgcolor=#d6d6d6 | 0 || || MBA-O || 18.07 || 1.3 km || multiple || 1999-2021 || 09 Dec 2021 || 53 || align=left | Disc.: Spacewatch || |- id="1999 VS122" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.9 || data-sort-value="0.78" | 780 m || multiple || 1999–2020 || 23 Dec 2020 || 49 || align=left | Disc.: Spacewatch || |- id="1999 VH125" bgcolor=#d6d6d6 | 3 || || MBA-O || 17.4 || 1.8 km || multiple || 1999–2020 || 23 Nov 2020 || 24 || align=left | Disc.: SpacewatchAdded on 17 January 2021 || |- id="1999 VN125" bgcolor=#E9E9E9 | 1 || || MBA-M || 19.0 || data-sort-value="0.47" | 470 m || multiple || 1999–2020 || 07 Dec 2020 || 32 || align=left | Disc.: Spacewatch || |- id="1999 VG128" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.0 || 1.4 km || multiple || 1999–2017 || 24 Oct 2017 || 57 || align=left | Disc.: SpacewatchAlt.: 2008 SX189 || |- id="1999 VW128" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.00 || 1.4 km || multiple || 1999–2021 || 13 Sep 2021 || 30 || align=left | Disc.: Spacewatch || |- id="1999 VS134" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.3 || data-sort-value="0.92" | 920 m || multiple || 1999–2020 || 08 Dec 2020 || 47 || align=left | Disc.: SpacewatchAdded on 11 May 2021Alt.: 2016 WN66 || |- id="1999 VT134" bgcolor=#d6d6d6 | 0 || || MBA-O || 18.1 || 1.3 km || multiple || 1999–2020 || 05 Nov 2020 || 39 || align=left | Disc.: SpacewatchAdded on 17 January 2021 || |- id="1999 VE135" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.9 || data-sort-value="0.70" | 700 m || multiple || 1999–2016 || 06 Oct 2016 || 24 || align=left | Disc.: Spacewatch || |- id="1999 VO139" bgcolor=#fefefe | 0 || || MBA-I || 19.93 || data-sort-value="0.33" | 330 m || multiple || 1999–2020 || 05 Nov 2020 || 53 || align=left | Disc.: SpacewatchAlt.: 2020 RD44 || |- id="1999 VX139" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.60 || 1.7 km || multiple || 1999–2021 || 06 Nov 2021 || 48 || align=left | Disc.: SpacewatchAdded on 5 November 2021 || |- id="1999 VN140" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.4 || 1.8 km || multiple || 1999–2015 || 19 Dec 2015 || 36 || align=left | Disc.: SpacewatchAlt.: 2007 VA256 || |- id="1999 VA142" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.32 || data-sort-value="0.91" | 910 m || multiple || 1999–2020 || 16 Nov 2020 || 83 || align=left | Disc.: SpacewatchAlt.: 2016 TH88 || |- id="1999 VJ152" bgcolor=#E9E9E9 | 1 || || MBA-M || 19.1 || data-sort-value="0.64" | 640 m || multiple || 1999–2020 || 10 Oct 2020 || 46 || align=left | Disc.: SpacewatchAlt.: 2016 WO64 || |- id="1999 VR152" bgcolor=#E9E9E9 | 1 || || MBA-M || 17.9 || 1.1 km || multiple || 1999–2020 || 16 Nov 2020 || 52 || align=left | Disc.: SpacewatchAdded on 17 January 2021 || |- id="1999 VS152" bgcolor=#d6d6d6 | 2 || || MBA-O || 17.9 || 1.5 km || multiple || 1999–2019 || 03 Dec 2019 || 33 || align=left | Disc.: SpacewatchAdded on 11 May 2021Alt.: 2019 VP14 || |- id="1999 VU175" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.73 || data-sort-value="0.52" | 520 m || multiple || 1999-2024 || 23 Dec 2024 || 60 || align=left | Disc.: SpacewatchAlt.: 2024 SR21 || |- id="1999 VX213" bgcolor=#FA8072 | 0 || || MCA || 19.11 || data-sort-value="0.49" | 490 m || multiple || 1999–2026 || 12 Jun 2026 || 59 || align=left | Disc.: LINEARAdded on 17 June 2021 || |- id="1999 VA217" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.4 || data-sort-value="0.62" | 620 m || multiple || 1999–2021 || 08 Jan 2021 || 27 || align=left | Disc.: SpacewatchAdded on 9 March 2021Alt.: 2007 RL18 || |- id="1999 VX217" bgcolor=#fefefe | 2 || || MBA-I || 19.4 || data-sort-value="0.39" | 390 m || multiple || 1999–2019 || 27 Oct 2019 || 41 || align=left | Disc.: SpacewatchAdded on 17 January 2021Alt.: 2009 SK406, 2019 SK62 || |- id="1999 VM222" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.1 || 1.3 km || multiple || 1999–2017 || 25 Oct 2017 || 32 || align=left | Disc.: Spacewatch || |- id="1999 VN228" bgcolor=#fefefe | 0 || || MBA-I || 18.8 || data-sort-value="0.54" | 500 m || multiple || 1995–2022 || 17 Sep 2022 || 61 || align=left | Disc.: Spacewatch || |- id="1999 VC233" bgcolor=#fefefe | 0 || || MBA-I || 19.18 || data-sort-value="0.43" | 430 m || multiple || 1999–2021 || 14 Nov 2021 || 58 || align=left | Disc.: Spacewatch || |- id="1999 VR233" bgcolor=#fefefe | 0 || || HUN || 19.17 || data-sort-value="0.44" | 440 m || multiple || 1999–2021 || 13 Oct 2021 || 45 || align=left | Disc.: Spacewatch || |- id="1999 VC234" bgcolor=#d6d6d6 | 2 || || MBA-O || 17.5 || 1.8 km || multiple || 1999–2019 || 01 Oct 2019 || 33 || align=left | Disc.: Spacewatch || |- id="1999 VD234" bgcolor=#d6d6d6