List of unnumbered minor planets: 1999 A–R

This is a partial list of unnumbered minor planets for principal provisional designations assigned between 1 January and 15 September 1999. , a total of 211 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.

A

|- id="1999 AF4" bgcolor=#FFC2E0 | 0 || || AMO || 18.5 || data-sort-value="0.71" | 710 m || multiple || 1998–2023 || 18 May 2023 || 501 || align=left | Disc.: LINEAR || |- id="1999 AM10" bgcolor=#FFC2E0 | 6 || || APO || 21.0 || data-sort-value="0.22" | 220 m || single || 11 days || 24 Jan 1999 || 27 || align=left | Disc.: LINEAR || |- id="1999 AO10" bgcolor=#FFC2E0 | 0 || || ATE || 24.36 || data-sort-value="0.059" | 59 m || multiple || 1999-2026 || 09 Jun 2026 || 207 || align=left | Disc.: LINEAR || |- id="1999 AN16" bgcolor=#fefefe | 0 || || HUN || 19.44 || data-sort-value="0.41" | 410 m || multiple || 1999–2024 || 30 Sep 2024 || 45 || align=left | Disc.: SpacewatchAlt.: 2015 BN466 ||

B

|- id="1999 BO" bgcolor=#FFC2E0 | 6 || 1999 BO || AMO || 19.1 || data-sort-value="0.54" | 540 m || single || 24 days || 09 Feb 1999 || 58 || align=left | Disc.: LINEAR || |- id="1999 BL33" bgcolor=#FFC2E0 | 7 || || AMO || 21.9 || data-sort-value="0.15" | 150 m || single || 21 days || 07 Feb 1999 || 17 || align=left | Disc.: Spacewatch ||

C

|- id="1999 CQ2" bgcolor=#FFC2E0 | 8 || || APO || 27.3 || data-sort-value="0.012" | 12 m || single || 6 days || 13 Feb 1999 || 16 || align=left | Disc.: Spacewatch || |- id="1999 CS3" bgcolor=#FA8072 | 5 || || MCA || 18.7 || data-sort-value="0.54" | 540 m || single || 38 days || 20 Mar 1999 || 48 || align=left | Disc.: LINEAR || |- id="1999 CG9" bgcolor=#FFC2E0 | 5 || || APO || 25.2 || data-sort-value="0.032" | 32 m || single || 24 days || 06 Mar 1999 || 42 || align=left | Disc.: LINEAR || |- id="1999 CW118" bgcolor=#C2E0FF | E || || TNO || 7.8 || 95 km || single || 86 days || 07 May 1999 || 7 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CX118" bgcolor=#C2E0FF | 5 || || TNO || 7.02 || 130 km || multiple || 1999-2026 || 21 Apr 2026 || 21 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CY118" bgcolor=#C2E0FF | 3 || || TNO || 8.67 || 70 km || multiple || 1999–2017 || 03 Mar 2017 || 37 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, SDO || |- id="1999 CZ118" bgcolor=#C2E0FF | 1 || || TNO || 7.9 || 99 km || multiple || 1999–2016 || 13 Mar 2016 || 29 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, SDO || |- id="1999 CA119" bgcolor=#C2E0FF | E || || TNO || 7.7 || 99 km || single || 86 days || 07 May 1999 || 6 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CB119" bgcolor=#C2E0FF | 3 || || TNO || 7.13 || 204 km || multiple || 1999–2022 || 08 Apr 2022 || 37 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (hot), BR-mag: 1.93; taxonomy: RR || |- id="1999 CC119" bgcolor=#C2E0FF | 2 || || TNO || 7.2 || 121 km || multiple || 1999–2019 || 05 Apr 2019 || 31 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CD119" bgcolor=#C2E0FF | E || || TNO || 7.3 || 119 km || single || 62 days || 13 Apr 1999 || 6 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CH119" bgcolor=#C2E0FF | 2 || || TNO || 7.1 || 158 km || multiple || 1999–2018 || 15 Mar 2018 || 24 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO || |- id="1999 CJ119" bgcolor=#C2E0FF | 2 || || TNO || 7.4 || 110 km || multiple || 1999–2018 || 18 Mar 2018 || 33 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold), BR-mag: 2.07 || |- id="1999 CK119" bgcolor=#C2E0FF | E || || TNO || 7.9 || 90 km || single || 8 days || 19 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CM119" bgcolor=#C2E0FF | 3 || || TNO || 7.9 || 87 km || multiple || 1999–2005 || 03 Nov 2005 || 14 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold), BR-mag: 1.78 || |- id="1999 CN119" bgcolor=#C2E0FF | 3 || || TNO || 8.1 || 80 km || multiple || 1999–2018 || 09 Dec 2018 || 21 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CZ129" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.18 || data-sort-value="0.75" | 750 m || multiple || 1999–2022 || 26 Dec 2022 || 171 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CB130" bgcolor=#d6d6d6 | – || || MBA-O || — || — || single || 2 days || 08 Feb 1999 || 6 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CD130" bgcolor=#fefefe | 1 || || MBA-I || 19.0 || data-sort-value="0.90" | 470 m || multiple || 1999-2020 || 23 May 2020 || 44 || align=left | Disc.: Mauna Kea Obs. Alt.: 2020 HM81 || |- id="1999 CE130" bgcolor=#d6d6d6 | E || || MBA-O || — || — || single || 3 days || 09 Feb 1999 || 8 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CL130" bgcolor=#fefefe | 0 || || MBA-I || 18.4 || data-sort-value="0.62" | 620 m || multiple || 1999–2020 || 20 Oct 2020 || 32 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CS130" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.68 || 1.6 km || multiple || 1999–2021 || 06 Oct 2021 || 54 || align=left | Disc.: Mauna Kea Obs.Added on 22 July 2020 || |- id="1999 CD131" bgcolor=#fefefe | 1 || || MBA-I || 18.9 || data-sort-value="0.49" | 490 m || multiple || 1999–2020 || 14 Aug 2020 || 55 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CW131" bgcolor=#C2E0FF | E || || TNO || 7.9 || 90 km || multiple || 1999–2000 || 07 Apr 2000 || 8 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CY131" bgcolor=#C2E0FF | E || || TNO || 8.1 || 100 km || single || 8 days || 19 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO || |- id="1999 CZ131" bgcolor=#C2E0FF | E || || TNO || 8.1 || 82 km || single || 8 days || 19 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CA132" bgcolor=#C2E0FF | E || || TNO || 7.4 || 114 km || single || 56 days || 08 Apr 1999 || 6 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CQ133" bgcolor=#C2E0FF | 4 || || TNO || 6.91 || 213 km || multiple || 1999–2021 || 20 Mar 2021 || 32 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (hot), BR-mag: 1.35 || |- id="1999 CR133" bgcolor=#C2E0FF | E || || TNO || 8.1 || 82 km || single || 6 days || 18 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CM153" bgcolor=#C2E0FF | 3 || || TNO || 7.4 || 110 km || multiple || 1999–2015 || 23 Mar 2015 || 25 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CN153" bgcolor=#C2E0FF | 9 || || TNO || 7.70 || 148 km || multiple || 1999–2006 || 02 Mar 2006 || 19 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (hot) || |- id="1999 CP153" bgcolor=#C2E0FF | E || || TNO || 7.7 || 99 km || multiple || 1999–2000 || 07 Apr 2000 || 11 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CQ153" bgcolor=#C2E0FF | 5 || || TNO || 8.0 || 83 km || multiple || 1999–2015 || 20 Mar 2015 || 14 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CR153" bgcolor=#C2E0FF | 6 || || TNO || 7.68 || 79 km || multiple || 1999-2026 || 25 Mar 2026 || 15 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CS153" bgcolor=#C2E0FF | E || || TNO || 8.1 || 82 km || multiple || 1999–2000 || 07 Apr 2000 || 10 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CT153" bgcolor=#C2E0FF | 5 || || TNO || 8.31 || 75 km || multiple || 1999-2017 || 23 Jan 2017 || 27 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 CG154" bgcolor=#C2E0FF | 5 || || TNO || 7.4 || 110 km || multiple || 1999–2005 || 10 Mar 2005 || 15 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CH154" bgcolor=#C2E0FF | 5 || || TNO || 7.66 || 98 km || multiple || 1999–2015 || 16 Mar 2015 || 13 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 CL154" bgcolor=#fefefe | 2 || || MBA-I || 18.66 || 550 m || multiple || 1999-2024 || 06 Jul 2024 || 20 || align=left | Disc.: Mauna Kea Obs.Alt.: 2024 KO8 || |- id="1999 CM154" bgcolor=#d6d6d6 | 6 || || MBA-O || 16.7 || 2.5 km || multiple || 1999–2020 || 11 Nov 2020 || 9 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CN154" bgcolor=#d6d6d6 | 4 || || MBA-O || 18.75 || 900 m || multiple || 1999-2014 || 04 Mar 2014 || 17 || align=left | Disc.: Mauna Kea Obs.Alt.: 2014 EM304 || |- id="1999 CM155" bgcolor=#d6d6d6 | E || || MBA-O || — || — || single || 2 days || 08 Feb 1999 || 6 || align=left | Disc.: Mauna Kea Obs. || |- id="1999 CR155" bgcolor=#FA8072 | 1 || || MCA || 17.6 || data-sort-value="0.71" | 900 m || multiple || 1999-2021 || 10 Apr 2021 || 66 || align=left | Disc.: LONEOS Alt.: 2010 CV75 || |- id="1999 CK158" bgcolor=#C2E0FF | 3 || || TNO || 8.3 || 91 km || multiple || 1999–2018 || 18 Feb 2018 || 19 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO ||

D

|- id="1999 DA" bgcolor=#C2E0FF | 3 || 1999 DA || TNO || 7.9 || 87 km || multiple || 1999–2015 || 24 Apr 2015 || 46 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 DB2" bgcolor=#FFC2E0 | 0 || || AMO || 19.0 || data-sort-value="0.56" | 560 m || multiple || 1999–2020 || 13 Jun 2020 || 189 || align=left | Disc.: LINEAR || |- id="1999 DY2" bgcolor=#FFC2E0 | 5 || || AMO || 21.9 || data-sort-value="0.15" | 150 m || single || 56 days || 15 Apr 1999 || 74 || align=left | Disc.: LINEAR || |- id="1999 DJ3" bgcolor=#FFC2E0 | 0 || || AMO || 20.78 || data-sort-value="0.23" | 230 m || multiple || 1999–2025 || 24 Feb 2025 || 50 || align=left | Disc.: Spacewatch || |- id="1999 DZ7" bgcolor=#C2E0FF | E || || TNO || 8.8 || 82 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, plutino? || |- id="1999 DA8" bgcolor=#C2E0FF | E || || TNO || 12.4 || 16 km || single || 1 day || 17 Feb 1999 || 6 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, plutino? || |- id="1999 DB8" bgcolor=#C2E0FF | E || || TNO || 10.0 || 42 km || single || 35 days || 23 Mar 1999 || 7 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, other TNO || |- id="1999 DC8" bgcolor=#C2E0FF | E || || TNO || 10.0 || 34 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DD8" bgcolor=#C2E0FF | E || || TNO || 11.1 || 28 km || single || 1 day || 17 Feb 1999 || 5 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, plutino? || |- id="1999 DE8" bgcolor=#C2E0FF | E || || TNO || 9.6 || 41 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DF8" bgcolor=#C2E0FF | E || || TNO || 9.9 || 36 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DG8" bgcolor=#C2E0FF | E || || TNO || 8.1 || 91 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, SDO || |- id="1999 DH8" bgcolor=#C2E0FF | 5 || || TNO || 8.7 || 60 km || multiple || 1999–2001 || 24 Feb 2001 || 11 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (cold) || |- id="1999 DL8" bgcolor=#C2E0FF | E || || TNO || 9.6 || 62 km || single || 35 days || 23 Mar 1999 || 6 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano (hot) || |- id="1999 DM8" bgcolor=#C2E0FF | E || || TNO || 9.7 || 39 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DN8" bgcolor=#C2E0FF | E || || TNO || 9.8 || 38 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DO8" bgcolor=#C2E0FF | E || || TNO || 10.0 || 34 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, cubewano? || |- id="1999 DP8" bgcolor=#C2E0FF | E || || TNO || 8.9 || 63 km || single || 1 day || 17 Feb 1999 || 4 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, SDO || |- id="1999 DQ8" bgcolor=#C2E0FF