# 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. As of June 2024, a total of 244 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.
| Near-Earth obj. | MBA (inner) | MBA (outer) | Centaur |
| Mars-crosser | MBA (middle) | Jupiter trojan | Trans-Neptunian obj. |
| Unclassified | | | |

## U

| U | Designation | Class | Physical | Physical | Observations | Observations | Observations | Observations | Description and notes | Ref |
| U | Designation | Class | H | D | Opp. | Arc | Last | Used | Description and notes | Ref |
| 0 | 1999 UQ | AMO | 21.88 | 160 m | multiple | 1999–2023 | 10 Jun 2023 | 113 | Disc.: LINEAR | MPC · JPL |
| 1 | 1999 UR | APO | 21.5 | 180 m | multiple | 1999–2013 | 13 Feb 2013 | 76 | Disc.: LINEAR Potentially hazardous object | MPC · JPL |
| 0 | 1999 UX4 | MBA-O | 16.75 | 2.5 km | multiple | 1999–2021 | 27 Nov 2021 | 73 | Disc.: Spacewatch Alt.: 2010 UB130 | MPC · JPL |
| – | 1999 UZ5 | APO | 21.8 | 160 m | single | 4 days | 04 Nov 1999 | 32 | Disc.: CSS | MPC · JPL |
| 1 | 1999 UP9 | MBA-M | 16.9 | 1.2 km | multiple | 1999–2021 | 18 Jan 2021 | 90 | Disc.: LINEAR Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 UD12 | MBA-M | 17.77 | 850 m | multiple | 1999-2021 | 04 Jan 2021 | 42 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 UD18 | MBA-M | 18.5 | 590 m | multiple | 1999–2020 | 14 Nov 2020 | 34 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 UE18 | MBA-O | 16.7 | 2.5 km | multiple | 1999–2020 | 17 Dec 2020 | 117 | Disc.: Spacewatch Alt.: 2009 SH281 | MPC · JPL |
| 1 | 1999 UH20 | MBA-I | 18.8 | 520 m | multiple | 1999–2020 | 19 Oct 2020 | 97 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UW21 | MBA-O | 17.66 | 1.6 km | multiple | 1999–2021 | 03 Apr 2021 | 29 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UW22 | MBA-M | 17.5 | 1.8 km | multiple | 1999–2020 | 19 Apr 2020 | 49 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UX30 | MBA-M | 18.54 | 820 m | multiple | 1999–2022 | 25 Jan 2022 | 39 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 UL31 | MBA-M | 18.42 | 590 m | multiple | 1999–2025 | 20 Feb 2025 | 58 | Disc.: Spacewatch Added on 11 May 2021 | MPC · JPL |
| 0 | 1999 UU32 | MBA-I | 18.45 | 610 m | multiple | 1999–2022 | 25 Jan 2022 | 77 | Disc.: Spacewatch Alt.: 2006 SM227 | MPC · JPL |
| 0 | 1999 UZ33 | MBA-I | 18.5 | 590 m | multiple | 1999–2020 | 27 Jan 2020 | 39 | Disc.: Spacewatch Alt.: 2007 YA17 | MPC · JPL |
| 1 | 1999 UL35 | MBA-M | 18.3 | 650 m | multiple | 1999–2019 | 25 Sep 2019 | 33 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UM35 | MBA-M | 17.9 | 780 m | multiple | 1999–2020 | 19 Nov 2020 | 41 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UC38 | MBA-M | 18.0 | 1.1 km | multiple | 1999–2020 | 21 Sep 2020 | 111 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UN39 | MBA-M | 18.61 | 840 m | multiple | 1999–2024 | 31 Jul 2024 | 97 | Disc.: Spacewatch Added on 17 January 2021 Alt.: 2016 UO254 | MPC · JPL |
| 1 | 1999 UU39 | MBA-I | 19.21 | 430 m | multiple | 1999-2022 | 23 Oct 2022 | 55 | Disc.: Spacewatch Alt.: 2022 SZ26 | MPC · JPL |
| 3 | 1999 UV39 | MBA-I | 19.3 | 410 m | multiple | 1999–2016 | 05 Nov 2016 | 27 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 UB41 | MBA-I | 18.6 | 570 m | multiple | 1999–2021 | 24 Sep 2021 | 40 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UK55 | MBA-M | 18.1 | 710 m | multiple | 1999–2021 | 05 Jan 2021 | 35 | Disc.: Spacewatch Added on 9 March 2021 Alt.: 2013 BR70 | MPC · JPL |
| 0 | 1999 UU57 | MBA-M | 18.17 | 980 m | multiple | 1999–2021 | 08 Dec 2021 | 63 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UA58 | MBA-I | 19.04 | 460 m | multiple | 1999–2021 | 25 Nov 2021 | 78 | Disc.: Spacewatch Alt.: 2017 QX18 | MPC · JPL |
| 3 | 1999 UP58 | MBA-I | 19.0 | 470 m | multiple | 1992–2017 | 13 Dec 2017 | 40 | Disc.: Spacewatch Alt.: 1992 WR7 | MPC · JPL |
| 0 | 1999 UY58 | MBA-I | 18.85 | 500 m | multiple | 1999–2021 | 08 Dec 2021 | 54 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UF59 | MBA-I | 18.6 | 570 m | multiple | 1999–2020 | 16 Oct 2020 | 48 | Disc.: Spacewatch Added on 19 October 2020 | MPC · JPL |
| 0 | 1999 US59 | MBA-O | 17.34 | 1.9 km | multiple | 1999–2022 | 27 Jan 2022 | 120 | Disc.: Spacewatch Added on 22 July 2020 Alt.: 2014 OA80 | MPC · JPL |
| 0 | 1999 UT59 | MBA-O | 17.1 | 2.1 km | multiple | 1999–2020 | 16 Dec 2020 | 36 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 UR65 | MBA-O | 16.19 | 3.2 km | multiple | 1999–2022 | 27 Jan 2022 | 203 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UT65 | MBA-O | 17.35 | 1.9 km | multiple | 1999–2021 | 08 May 2021 | 83 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UA66 | MBA-M | 17.7 | 1.2 km | multiple | 1999–2019 | 03 Apr 2019 | 50 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UB66 | MBA-M | 17.63 | 1.7 km | multiple | 1999–2021 | 26 Nov 2021 | 91 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UD66 | MBA-M | 17.4 | 1.8 km | multiple | 1999–2021 | 09 Jun 2021 | 41 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UJ66 | MBA-O | 16.96 | 2.3 km | multiple | 1999–2022 | 27 Jan 2022 | 77 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UK66 | MBA-M | 17.84 | 800 m | multiple | 1999–2022 | 26 Jan 2022 | 80 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UN66 | MBA-O | 17.64 | 1.7 km | multiple | 1999–2021 | 08 May 2021 | 41 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UO66 | MBA-M | 18.06 | 1.0 km | multiple | 1995–2022 | 27 Jan 2022 | 73 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UP66 | MBA-O | 16.30 | 3.1 km | multiple | 1999–2022 | 25 Jan 2022 | 97 | Disc.: SDSS | MPC · JPL |
| 0 | 1999 UQ66 | MBA-I | 18.90 | 490 m | multiple | 1999–2021 | 07 Nov 2021 | 41 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 UR66 | MBA-O | 16.71 | 2.5 km | multiple | 1999–2021 | 08 Nov 2021 | 94 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 US66 | MBA-M | 17.63 | 1.3 km | multiple | 1999–2021 | 08 Nov 2021 | 73 | Disc.: DB Missing Added on 22 July 2020 | MPC · JPL |
| 2 | 1999 UT66 | MBA-M | 18.57 | 580 m | multiple | 1999–2023 | 10 Sep 2023 | 40 | Disc.: Spacewatch Added on 22 July 2020 | MPC · JPL |
| 2 | 1999 UU66 | MBA-I | 19.6 | 360 m | multiple | 1999–2020 | 23 Nov 2020 | 56 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 UA67 | MBA-M | 18.18 | 970 m | multiple | 1999–2021 | 09 Nov 2021 | 58 | Disc.: No observations Added on 5 November 2021 | MPC · JPL |

## V

| U | Designation | Class | Physical | Physical | Observations | Observations | Observations | Observations | Description and notes | Ref |
| U | Designation | Class | H | D | Opp. | Arc | Last | Used | Description and notes | Ref |
| 2 | 1999 VT | AMO | 19.7 | 410 m | multiple | 1999–2019 | 08 Nov 2019 | 175 | Disc.: CSS | MPC · JPL |
| 0 | 1999 VL1 | MCA | 19.69 | 410 m | multiple | 1999-2022 | 26 Nov 2022 | 109 | Disc.: CSS | MPC · JPL |
| 0 | 1999 VQ3 | MBA-M | 18.7 | 760 m | multiple | 1999–2018 | 16 Jan 2018 | 35 | Disc.: Spacewatch | MPC · JPL |
| – | 1999 VQ5 | MCA | 19.4 | 390 m | single | 10 days | 14 Nov 1999 | 78 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 VR6 | APO | 20.8 | 250 m | multiple | 1999–2016 | 12 Jun 2016 | 152 | Disc.: LINEAR Alt.: 2012 UV68 | MPC · JPL |
| 7 | 1999 VN11 | AMO | 20.3 | 310 m | single | 8 days | 14 Nov 1999 | 71 | Disc.: LINEAR | MPC · JPL |
| – | 1999 VK12 | APO | 23.7 | 65 m | single | 3 days | 12 Nov 1999 | 16 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 VQ14 | MBA-M | 17.48 | 1.3 km | multiple | 1999–2023 | 18 Apr 2023 | 63 | Disc.: Kitt Peak | MPC · JPL |
| 0 | 1999 VS14 | MBA-M | 18.41 | 870 m | multiple | 1999–2016 | 25 Oct 2016 | 26 | Disc.: Kitt Peak Obs. Added on 29 January 2022 | MPC · JPL |
| 1 | 1999 VV15 | MBA-I | 19.1 | 450 m | multiple | 1999–2020 | 14 Jan 2020 | 34 | Disc.: Spacewatch Added on 22 July 2020 | MPC · JPL |
| 0 | 1999 VX15 | AMO | 18.66 | 660 m | multiple | 1999–2021 | 11 May 2021 | 232 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 VY15 | MBA-M | 18.3 | 920 m | multiple | 1999–2020 | 15 Sep 2020 | 48 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VA16 | MBA-I | 19.2 | 430 m | multiple | 1999–2018 | 10 Dec 2018 | 51 | Disc.: Spacewatch Alt.: 2012 DS41 | MPC · JPL |
| 2 | 1999 VC16 | MBA-I | 18.7 | 540 m | multiple | 1999–2020 | 16 Nov 2020 | 69 | Disc.: Spacewatch Alt.: 2006 SN368 | MPC · JPL |
| 0 | 1999 VP16 | MBA-O | 17.32 | 1.9 km | multiple | 1999–2021 | 06 Nov 2021 | 58 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VZ16 | MBA-I | 18.9 | 490 m | multiple | 1999–2019 | 02 Jun 2019 | 41 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VU18 | MBA-I | 19.59 | 360 m | multiple | 1999–2021 | 30 Nov 2021 | 69 | Disc.: Spacewatch | MPC · JPL |
| 7 | 1999 VU25 | AMO | 23.8 | 62 m | single | 4 days | 15 Nov 1999 | 13 | Disc.: LINEAR | MPC · JPL |
| 7 | 1999 VV25 | APO | 25.1 | 34 m | single | 3 days | 17 Nov 1999 | 27 | Disc.: LINEAR | MPC · JPL |
| – | 1999 VW25 | ATE | 25.3 | 31 m | single | 3 days | 17 Nov 1999 | 31 | Disc.: LINEAR | MPC · JPL |
| 7 | 1999 VX25 | ATE | 26.7 | 16 m | single | 5 days | 20 Nov 1999 | 40 | Disc.: LINEAR | MPC · JPL |
| – | 1999 VX39 | MBA-M | 18.2 | 680 m | single | 8 days | 12 Nov 1999 | 9 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VZ39 | MBA-M | 18.0 | 750 m | multiple | 1999–2021 | 04 Jan 2021 | 53 | Disc.: Spacewatch | MPC · JPL |
| 3 | 1999 VB41 | MBA-I | 19.0 | 470 m | multiple | 1999–2020 | 26 Sep 2020 | 40 | Disc.: Spacewatch Alt.: 2020 PJ36 | MPC · JPL |
| 1 | 1999 VZ42 | MBA-M | 18.4 | 620 m | multiple | 1999–2021 | 18 Jan 2021 | 56 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VA46 | MBA-M | 17.4 | 980 m | multiple | 1999–2021 | 14 Jan 2021 | 184 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 VF73 | MCA | 19.9 | 440 m | multiple | 1999–2020 | 12 Sep 2020 | 70 | Disc.: Spacewatch Alt.: 2013 AG150 | MPC · JPL |
| 0 | 1999 VM74 | MCA | 19.5 | 550 m | multiple | 1999–2024 | 30 Sep 2024 | 40 | Disc.: Spacewatch Added on 17 June 2021 Alt.: 2020 TJ43 | MPC · JPL |
| 0 | 1999 VH75 | MBA-M | 17.7 | 860 m | multiple | 1999–2020 | 14 Dec 2020 | 76 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VE76 | HIL | 16.8 | 2.4 km | multiple | 1999–2015 | 06 Dec 2015 | 28 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 VX83 | MBA-I | 19.6 | 360 m | multiple | 1999–2020 | 17 Oct 2020 | 61 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VK84 | MBA-M | 18.8 | 520 m | multiple | 1999–2021 | 07 Feb 2021 | 52 | Disc.: Spacewatch Added on 21 August 2021 | MPC · JPL |
| 2 | 1999 VS92 | MBA-M | 17.8 | 820 m | multiple | 1999–2021 | 23 Jan 2021 | 67 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 VF99 | MBA-O | 16.0 | 3.5 km | multiple | 1999–2020 | 25 May 2020 | 82 | Disc.: LINEAR Alt.: 2010 KC124 | MPC · JPL |
| 0 | 1999 VS115 | MBA-I | 18.6 | 570 m | multiple | 1999–2018 | 15 Dec 2018 | 62 | Disc.: Spacewatch Alt.: 2014 RF72 | MPC · JPL |
| 0 | 1999 VM116 | MBA-M | 18.4 | 880 m | multiple | 1996–2021 | 30 Nov 2021 | 46 | Disc.: Spacewatch Added on 24 December 2021 | MPC · JPL |
| 1 | 1999 VP118 | MBA-M | 18.86 | 450 m | multiple | 1999–2024 | 02 Oct 2024 | 47 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VU118 | MBA-O | 17.81 | 1.5 km | multiple | 1999–2022 | 04 Jan 2022 | 50 | Disc.: Spacewatch Alt.: 2015 UX37 | MPC · JPL |
| 0 | 1999 VO120 | MBA-I | 18.95 | 480 m | multiple | 1999–2022 | 25 Jan 2022 | 46 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VN121 | MBA-M | 19.3 | 580 m | multiple | 1999–2021 | 26 Oct 2021 | 30 | Disc.: Spacewatch Added on 29 January 2022 | MPC · JPL |
| 0 | 1999 VO121 | MBA-O | 18.07 | 1.3 km | multiple | 1999-2021 | 09 Dec 2021 | 53 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VC122 | MBA-I | 19.2 | 430 m | multiple | 1999-2018 | 07 Aug 2018 | 58 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VL122 | MBA-M | 17.4 | 980 m | multiple | 1999–2019 | 06 Jul 2019 | 55 | Disc.: Spacewatch Alt.: 2014 HE152, 2015 OR61 | MPC · JPL |
| 0 | 1999 VS122 | MBA-M | 17.9 | 780 m | multiple | 1999–2020 | 23 Dec 2020 | 49 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VJ123 | MBA-O | 18.1 | 1.3 km | multiple | 1999–2020 | 17 Oct 2020 | 62 | Disc.: Spacewatch Alt.: 2015 XY302 | MPC · JPL |
| 3 | 1999 VH125 | MBA-O | 17.4 | 1.8 km | multiple | 1999–2020 | 23 Nov 2020 | 24 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 1 | 1999 VN125 | MBA-M | 19.0 | 470 m | multiple | 1999–2020 | 07 Dec 2020 | 32 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 VG128 | MBA-M | 18.0 | 1.4 km | multiple | 1999–2017 | 24 Oct 2017 | 57 | Disc.: Spacewatch Alt.: 2008 SX189 | MPC · JPL |
| 0 | 1999 VV128 | MBA-I | 18.53 | 580 m | multiple | 1999–2021 | 01 Nov 2021 | 95 | Disc.: Spacewatch Added on 21 August 2021 Alt.: 2008 DK74 | MPC · JPL |
| 0 | 1999 VW128 | MBA-M | 18.00 | 1.4 km | multiple | 1999–2021 | 13 Sep 2021 | 30 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VU129 | MBA-O | 16.8 | 2.4 km | multiple | 1999–2020 | 04 Dec 2020 | 50 | Disc.: Spacewatch Added on 17 January 2021 Alt.: 2014 QZ160 | MPC · JPL |
| 0 | 1999 VY131 | MBA-I | 18.72 | 540 m | multiple | 1999–2021 | 09 Nov 2021 | 65 | Disc.: Spacewatch Added on 5 November 2021 | MPC · JPL |
| 0 | 1999 VJ133 | MBA-M | 18.28 | 1.2 km | multiple | 1999–2021 | 29 Oct 2021 | 95 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 VS134 | MBA-M | 18.3 | 920 m | multiple | 1999–2020 | 08 Dec 2020 | 47 | Disc.: Spacewatch Added on 11 May 2021 Alt.: 2016 WN66 | MPC · JPL |
| 0 | 1999 VT134 | MBA-O | 18.1 | 1.3 km | multiple | 1999–2020 | 05 Nov 2020 | 39 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 1 | 1999 VE135 | MBA-M | 18.9 | 700 m | multiple | 1999–2016 | 06 Oct 2016 | 24 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 VO139 | MBA-I | 19.8 | 330 m | multiple | 1999–2020 | 05 Nov 2020 | 48 | Disc.: Spacewatch Alt.: 2020 RD44 | MPC · JPL |
| 1 | 1999 VX139 | MBA-O | 17.60 | 1.7 km | multiple | 1999–2021 | 06 Nov 2021 | 48 | Disc.: Spacewatch Added on 5 November 2021 | MPC · JPL |
| 1 | 1999 VN140 | MBA-O | 17.4 | 1.8 km | multiple | 1999–2015 | 19 Dec 2015 | 36 | Disc.: Spacewatch Alt.: 2007 VA256 | MPC · JPL |
| 0 | 1999 VA142 | MBA-M | 18.32 | 910 m | multiple | 1999–2020 | 16 Nov 2020 | 83 | Disc.: Spacewatch Alt.: 2016 TH88 | MPC · JPL |
| 0 | 1999 VE142 | MBA-M | 18.0 | 750 m | multiple | 1999–2020 | 09 Dec 2020 | 44 | Disc.: Spacewatch Added on 9 March 2021 Alt.: 2015 PK189 | MPC · JPL |
| 0 | 1999 VR142 | MBA-I | 18.76 | 530 m | multiple | 1999–2021 | 06 Apr 2021 | 51 | Disc.: Spacewatch Alt.: 2009 WV132 | MPC · JPL |
| 1 | 1999 VJ152 | MBA-M | 19.1 | 640 m | multiple | 1999–2020 | 10 Oct 2020 | 46 | Disc.: Spacewatch Alt.: 2016 WO64 | MPC · JPL |
| 1 | 1999 VR152 | MBA-M | 17.9 | 1.1 km | multiple | 1999–2020 | 16 Nov 2020 | 52 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 2 | 1999 VS152 | MBA-O | 17.9 | 1.5 km | multiple | 1999–2019 | 03 Dec 2019 | 33 | Disc.: Spacewatch Added on 11 May 2021 Alt.: 2019 VP14 | MPC · JPL |
| 0 | 1999 VR153 | MBA-M | 17.39 | 1.9 km | multiple | 1999–2021 | 12 May 2021 | 64 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VS174 | MBA-I | 18.8 | 520 m | multiple | 1999–2017 | 15 Dec 2017 | 47 | Disc.: Spacewatch Alt.: 2010 XD91 | MPC · JPL |
| 0 | 1999 VD175 | MBA-I | 18.2 | 680 m | multiple | 1999–2021 | 12 Jan 2021 | 69 | Disc.: Spacewatch Alt.: 2009 SV145 | MPC · JPL |
| 1 | 1999 VU175 | MBA-M | 18.73 | 520 m | multiple | 1999-2024 | 23 Dec 2024 | 60 | Disc.: Spacewatch Alt.: 2024 SR21 | MPC · JPL |
| 1 | 1999 VF209 | MBA-M | 17.3 | 1.0 km | multiple | 1999–2020 | 23 Dec 2020 | 56 | Disc.: LINEAR Added on 11 May 2021 Alt.: 2019 GP80 | MPC · JPL |
| 1 | 1999 VH210 | MBA-M | 17.5 | 940 m | multiple | 1999–2021 | 14 Jan 2021 | 53 | Disc.: LINEAR Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 VU211 | MBA-I | 18.89 | 500 m | multiple | 1999–2021 | 24 Nov 2021 | 127 | Disc.: LINEAR Alt.: 2013 BF53, 2018 VV65 | MPC · JPL |
| 1 | 1999 VX213 | HUN | 18.9 | 490 m | multiple | 1999–2021 | 08 Jun 2021 | 45 | Disc.: LINEAR Added on 17 June 2021 | MPC · JPL |
| 0 | 1999 VR216 | MBA-I | 18.5 | 590 m | multiple | 1999–2018 | 15 Oct 2018 | 54 | Disc.: Spacewatch Alt.: 2014 QL341 | MPC · JPL |
| 2 | 1999 VA217 | MBA-M | 18.4 | 620 m | multiple | 1999–2021 | 08 Jan 2021 | 27 | Disc.: Spacewatch Added on 9 March 2021 Alt.: 2007 RL18 | MPC · JPL |
| 2 | 1999 VX217 | MBA-I | 19.4 | 390 m | multiple | 1999–2019 | 27 Oct 2019 | 41 | Disc.: Spacewatch Added on 17 January 2021 Alt.: 2009 SK406, 2019 SK62 | MPC · JPL |
| 0 | 1999 VJ218 | MBA-M | 17.40 | 1.8 km | multiple | 1999–2021 | 17 May 2021 | 115 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VW220 | MBA-M | 17.48 | 1.3 km | multiple | 1999–2022 | 22 Jan 2022 | 105 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VV221 | MBA-M | 18.56 | 820 m | multiple | 1999–2021 | 30 Nov 2021 | 64 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VM222 | MBA-M | 18.1 | 1.3 km | multiple | 1999–2017 | 25 Oct 2017 | 32 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VA226 | MBA-M | 18.2 | 960 m | multiple | 1999–2020 | 13 Sep 2020 | 49 | Disc.: Spacewatch Alt.: 2003 SG239 | MPC · JPL |
| 0 | 1999 VB226 | MBA-O | 17.41 | 1.8 km | multiple | 1999–2020 | 14 Dec 2020 | 55 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VN228 | MBA-I | 18.8 | 500 m | multiple | 1995–2022 | 17 Sep 2022 | 61 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VL232 | MBA-I | 18.0 | 750 m | multiple | 1999–2020 | 11 Dec 2020 | 82 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VM232 | MBA-O | 16.37 | 3.0 km | multiple | 1999–2021 | 08 Aug 2021 | 66 | Disc.: Spacewatch Alt.: 2010 MQ11 | MPC · JPL |
| 0 | 1999 VO232 | MBA-M | 17.97 | 1.1 km | multiple | 1999–2021 | 02 Oct 2021 | 67 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VT232 | MBA-M | 17.6 | 1.3 km | multiple | 1999–2020 | 05 Nov 2020 | 72 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VX232 | MBA-M | 18.04 | 1.4 km | multiple | 1999–2021 | 04 Oct 2021 | 75 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VY232 | MBA-M | 18.1 | 1.0 km | multiple | 1999–2020 | 15 Oct 2020 | 63 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VC233 | MBA-I | 19.18 | 430 m | multiple | 1999–2021 | 14 Nov 2021 | 58 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VD233 | MBA-I | 18.5 | 590 m | multiple | 1999–2021 | 18 Jan 2021 | 66 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VF233 | MBA-M | 17.66 | 1.6 km | multiple | 1999–2021 | 10 Nov 2021 | 53 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VH233 | MBA-I | 17.76 | 830 m | multiple | 1999–2021 | 09 May 2021 | 88 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VN233 | MBA-O | 16.27 | 3.1 km | multiple | 1999–2022 | 17 Jan 2022 | 77 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VR233 | HUN | 19.17 | 440 m | multiple | 1999–2021 | 13 Oct 2021 | 45 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VS233 | MBA-O | 17.5 | 1.8 km | multiple | 1999–2018 | 07 Nov 2018 | 35 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VW233 | MBA-I | 19.04 | 460 m | multiple | 1999–2021 | 13 Sep 2021 | 51 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VX233 | MBA-M | 18.6 | 570 m | multiple | 1999–2021 | 18 Jan 2021 | 41 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VY233 | MBA-M | 17.92 | 1.5 km | multiple | 1999–2021 | 28 Oct 2021 | 85 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 VB234 | MBA-M | 17.5 | 940 m | multiple | 1999–2021 | 15 Jan 2021 | 118 | Disc.: Kitt Peak | MPC · JPL |
| 2 | 1999 VC234 | MBA-O | 17.5 | 1.8 km | multiple | 1999–2019 | 01 Oct 2019 | 33 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 VD234 | MBA-O | 17.6 | 1.7 km | multiple | 1999–2020 | 31 Jan 2020 | 35 | Disc.: Spacewatch Added on 22 July 2020 | MPC · JPL |
| 2 | 1999 VF234 | MBA-I | 18.7 | 540 m | multiple | 1999–2021 | 06 Jan 2021 | 96 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 2 | 1999 VG234 | MBA-O | 17.9 | 1.5 km | multiple | 1999–2020 | 17 Nov 2020 | 29 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 VH234 | MBA-M | 18.75 | 760 m | multiple | 1999–2024 | 11 Sep 2024 | 47 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 2 | 1999 VJ234 | MBA-O | 17.5 | 1.8 km | multiple | 1999–2021 | 10 Feb 2021 | 26 | Disc.: Spacewatch Added on 11 May 2021 | MPC · JPL |
| 1 | 1999 VL234 | MCA | 19.61 | 360 m | multiple | 1999–2022 | 27 Jan 2022 | 19 | Disc.: Spacewatch Added on 24 December 2021 | MPC · JPL |

## W

| U | Designation | Class | Physical | Physical | Observations | Observations | Observations | Observations | Description and notes | Ref |
| U | Designation | Class | H | D | Opp. | Arc | Last | Used | Description and notes | Ref |
| 0 | 1999 WX10 | MBA-O | 17.72 | 1.6 km | multiple | 1999–2021 | 26 Nov 2021 | 45 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WU15 | MBA-M | 17.43 | 1.4 km | multiple | 1999–2022 | 25 Jan 2022 | 130 | Disc.: Spacewatch Alt.: 2016 WM39 | MPC · JPL |
| – | 1999 WM19 | MBA-M | 18.6 | 570 m | single | 13 days | 13 Dec 1999 | 9 | Disc.: Spacewatch | MPC · JPL |
| 3 | 1999 WA21 | MBA-I | 18.6 | 570 m | multiple | 1999–2014 | 28 Nov 2014 | 42 | Disc.: Spacewatch Alt.: 2014 TM28 | MPC · JPL |
| 0 | 1999 WK21 | MBA-O | 17.64 | 1.7 km | multiple | 1999–2021 | 08 May 2021 | 69 | Disc.: Spacewatch Alt.: 2016 FO24 | MPC · JPL |
| 0 | 1999 WX21 | MBA-I | 18.5 | 590 m | multiple | 1999–2018 | 06 Oct 2018 | 50 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WY21 | MBA-M | 17.97 | 1.4 km | multiple | 1999–2021 | 10 Sep 2021 | 38 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 WA22 | MBA-M | 17.7 | 1.2 km | multiple | 1999–2021 | 15 Jan 2021 | 63 | Disc.: Spacewatch Added on 9 March 2021 Alt.: 2020 TP9 | MPC · JPL |
| 0 | 1999 WU22 | MBA-I | 18.93 | 490 m | multiple | 1999–2021 | 07 Nov 2021 | 54 | Disc.: Spacewatch | MPC · JPL |
| 3 | 1999 WD23 | MBA-M | 19.9 | 440 m | multiple | 1999–2020 | 05 Nov 2020 | 24 | Disc.: Spacewatch Added on 17 June 2021 Alt.: 2020 UT40 | MPC · JPL |
| 1 | 1999 WL25 | MBA-O | 18.73 | 1.0 km | multiple | 1999–2021 | 15 Apr 2021 | 26 | Disc.: Spacewatch Added on 17 June 2021 Alt.: 2019 UT58 | MPC · JPL |
| 0 | 1999 WA28 | MBA-I | 18.10 | 710 m | multiple | 1999–2021 | 14 May 2021 | 112 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WO28 | MBA-I | 18.8 | 520 m | multiple | 1999–2020 | 07 Dec 2020 | 69 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WP28 | MBA-I | 18.36 | 630 m | multiple | 1999–2022 | 24 Jan 2022 | 68 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WQ28 | MBA-I | 18.2 | 680 m | multiple | 1999–2020 | 17 Nov 2020 | 62 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WR28 | MBA-I | 18.7 | 540 m | multiple | 1999–2020 | 23 Jun 2020 | 48 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WS28 | MBA-M | 17.3 | 1.5 km | multiple | 1999–2020 | 04 Nov 2020 | 40 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 WT28 | MBA-I | 19.3 | 410 m | multiple | 1999–2019 | 15 Nov 2019 | 66 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WU28 | MBA-I | 18.4 | 620 m | multiple | 1999–2019 | 23 Oct 2019 | 51 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WY28 | MBA-O | 16.74 | 2.5 km | multiple | 1999–2019 | 07 Jun 2019 | 38 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 WF29 | MBA-I | 18.7 | 540 m | multiple | 1999–2021 | 18 Jan 2021 | 50 | Disc.: Spacewatch Added on 9 March 2021 | MPC · JPL |

## X

| U | Designation | Class | Physical | Physical | Observations | Observations | Observations | Observations | Description and notes | Ref |
| U | Designation | Class | H | D | Opp. | Arc | Last | Used | Description and notes | Ref |
| 0 | 1999 XM16 | MBA-I | 17.38 | 990 m | multiple | 1999–2021 | 14 Apr 2021 | 165 | Disc.: LINEAR Alt.: 2010 BA14 | MPC · JPL |
| 2 | 1999 XS35 | CEN | 17.2 | 2.2 km | single | 88 days | 28 Feb 2000 | 206 | Disc.: LONEOS Potentially hazardous object NEO larger than 1 kilometer APO at MPC | MPC · JPL |
| 0 | 1999 XF106 | MBA-M | 17.24 | 1.5 km | multiple | 1999–2022 | 27 Jan 2022 | 87 | Disc.: Prescott Obs. | MPC · JPL |
| 0 | 1999 XO135 | MCA | 16.80 | 2.4 km | multiple | 1999–2022 | 15 Jan 2022 | 172 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 XK136 | APO | 20.55 | 811 m | multiple | 1999–2022 | 06 Jan 2022 | 139 | Disc.: LINEAR Potentially hazardous object | MPC · JPL |
| 5 | 1999 XN141 | APO | 22.6 | 110 m | single | 16 days | 30 Dec 1999 | 18 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 XX146 | MBA-O | 17.43 | 1.8 km | multiple | 1999–2021 | 27 Nov 2021 | 64 | Disc.: Spacewatch Added on 5 November 2021 | MPC · JPL |
| 0 | 1999 XT147 | MBA-O | 17.1 | 2.1 km | multiple | 1999–2020 | 08 Oct 2020 | 55 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 XA148 | MBA-O | 17.17 | 2.0 km | multiple | 1999–2022 | 06 Jan 2022 | 63 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |
| 0 | 1999 XJ148 | MBA-I | 19.15 | 440 m | multiple | 1999–2021 | 30 Nov 2021 | 83 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XX148 | HUN | 18.96 | 490 m | multiple | 1999–2024 | 07 Jun 2024 | 47 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XN149 | MBA-M | 17.12 | 1.6 km | multiple | 1999–2022 | 17 Jan 2022 | 206 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 XS149 | MBA-M | 17.96 | 800 m | multiple | 1999–2023 | 13 Aug 2023 | 45 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XE150 | MBA-M | 18.25 | 670 m | multiple | 1999–2021 | 14 Apr 2021 | 59 | Disc.: Spacewatch Added on 24 August 2020 Alt.: 2011 VN7, 2019 UX32 | MPC · JPL |
| 0 | 1999 XO150 | MBA-O | 16.5 | 2.8 km | multiple | 1999–2021 | 05 Jan 2021 | 106 | Disc.: Spacewatch Alt.: 2014 UU221, 2016 AL94 | MPC · JPL |
| 0 | 1999 XA216 | MBA-I | 18.5 | 590 m | multiple | 1999–2019 | 26 Sep 2019 | 60 | Disc.: Spacewatch Alt.: 2002 TG386, 2016 WG22 | MPC · JPL |
| 0 | 1999 XK232 | MBA-M | 17.8 | 820 m | multiple | 1999–2019 | 29 Sep 2019 | 46 | Disc.: Spacewatch Added on 30 September 2021 Alt.: 2003 UK436 | MPC · JPL |
| 1 | 1999 XW232 | MBA-M | 17.4 | 980 m | multiple | 1999–2021 | 07 Feb 2021 | 65 | Disc.: LINEAR Added on 11 May 2021 Alt.: 2015 PX56 | MPC · JPL |
| 1 | 1999 XK251 | MBA-O | 17.65 | 1.6 km | multiple | 1999–2021 | 06 Jul 2021 | 39 | Disc.: Spacewatch Alt.: 2016 XF10 | MPC · JPL |
| 0 | 1999 XT253 | MBA-M | 18.24 | 1.3 km | multiple | 1999–2021 | 06 Nov 2021 | 71 | Disc.: Spacewatch Added on 5 November 2021 | MPC · JPL |
| 0 | 1999 XF254 | MBA-I | 19.1 | 450 m | multiple | 1999–2020 | 18 Aug 2020 | 37 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 XF266 | MBA-I | 19.3 | 410 m | multiple | 1999–2020 | 11 Aug 2020 | 31 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XG266 | MBA-O | 16.49 | 2.8 km | multiple | 1999–2022 | 06 Jan 2022 | 158 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XL266 | MBA-O | 16.5 | 2.8 km | multiple | 1999–2019 | 24 Dec 2019 | 53 | Disc.: Spacewatch Alt.: 2010 BE135 | MPC · JPL |
| 0 | 1999 XM266 | MBA-I | 18.73 | 530 m | multiple | 1999–2021 | 30 Jun 2021 | 46 | Disc.: Kitt Peak | MPC · JPL |
| 0 | 1999 XS266 | MBA-M | 17.9 | 780 m | multiple | 1999–2019 | 05 Aug 2019 | 44 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 XT266 | MBA-O | 16.47 | 2.8 km | multiple | 1999–2022 | 27 Jan 2022 | 67 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 XX266 | MBA-I | 18.0 | 750 m | multiple | 1999–2020 | 14 Sep 2020 | 50 | Disc.: Spacewatch Added on 13 September 2020 | MPC · JPL |

## Y

| U | Designation | Class | Physical | Physical | Observations | Observations | Observations | Observations | Description and notes | Ref |
| U | Designation | Class | H | D | Opp. | Arc | Last | Used | Description and notes | Ref |
| 4 | 1999 YD | APO | 21.1 | 210 m | single | 71 days | 26 Feb 2000 | 99 | Disc.: LINEAR Potentially hazardous object AMO at MPC | MPC · JPL |
| 0 | 1999 YD2 | MBA-I | 18.17 | 690 m | multiple | 1995–2021 | 10 Dec 2021 | 106 | Disc.: Spacewatch Added on 22 July 2020 | MPC · JPL |
| 0 | 1999 YH2 | MBA-O | 16.81 | 2.4 km | multiple | 1999-2022 | 29 Nov 2022 | 38 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 YE3 | MCA | 16.72 | 1.9 km | multiple | 1999–2021 | 03 Apr 2021 | 232 | Disc.: LINEAR | MPC · JPL |
| 0 | 1999 YD16 | MBA-M | 16.9 | 1.2 km | multiple | 1999–2021 | 14 Jan 2021 | 70 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 YE19 | MBA-O | 17.3 | 1.9 km | multiple | 1999–2018 | 17 Aug 2018 | 36 | Disc.: Mauna Kea Obs. Added on 22 July 2020 | MPC · JPL |
| 0 | 1999 YB20 | MBA-O | 17.3 | 1.9 km | multiple | 1999–2019 | 30 Nov 2019 | 33 | Disc.: Mauna Kea Obs. | MPC · JPL |
| 4 | 1999 YP20 | MBA-O | 17.6 | 1.7 km | multiple | 1999–2020 | 17 Nov 2020 | 16 | Disc.: Mauna Kea Obs. Added on 11 May 2021 Alt.: 2020 UM39 | MPC · JPL |
| 0 | 1999 YV20 | JT | 14.85 | 6.0 km | multiple | 1999–2021 | 08 Dec 2021 | 58 | Disc.: Mauna Kea Obs. Added on 17 January 2021 Greek camp (L4) Alt.: 2010 CG253 | MPC · JPL |
| 1 | 1999 YD21 | MBA-M | 18.25 | 1.2 km | multiple | 1999–2021 | 02 Oct 2021 | 26 | Disc.: Mauna Kea Obs. Added on 17 June 2021 | MPC · JPL |
| 1 | 1999 YA29 | MBA-M | 17.9 | 780 m | multiple | 1999–2021 | 16 Jan 2021 | 51 | Disc.: Spacewatch | MPC · JPL |
| 0 | 1999 YD30 | MBA-O | 16.94 | 2.3 km | multiple | 1999–2021 | 09 Apr 2021 | 66 | Disc.: Spacewatch | MPC · JPL |
| 1 | 1999 YP30 | MBA-I | 18.6 | 570 m | multiple | 1999–2019 | 19 Sep 2019 | 47 | Disc.: Spacewatch | MPC · JPL |
| 2 | 1999 YR30 | MBA-I | 18.8 | 520 m | multiple | 1999–2021 | 16 Jan 2021 | 51 | Disc.: Spacewatch Added on 17 January 2021 | MPC · JPL |