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| Breakdown of small bodies of the Solar System: |
The following is a list of unnumbered minor planets in chronological order of their principal provisional designation. Contrary to their numbered counterparts, unnumbered minor planets have a poorly determined orbit due to insufficient observational data. This also includes lost minor planets which have not been observed for many years, or even decades., the Minor Planet Center (MPC) accounts for 676,755 unnumbered minor planets which represent of the overall minor planet population. Unnumbered minor planets can be further divided into 129,103 single-opposition objects with short observation arcs, prone to mismatch and loss, and 547,652 objects that have been observed multiple times during opposition, when astrometric conditions are most favorable. The JPL Small-Body Database gives a running total of 676,786 unnumbered minor planets.
The tables below contain 95 objects with a principal designation assigned between 1927 and 1993. Additional partial lists cover the period from 1994 to 2004. Unnumbered minor planets detected after 2004 are not listed due to their large number (see statistics). The orbital uncertainty parameter (U) ranges from low ("0") to very high ("9"). For some single-opposition objects no numeric uncertainty is given ("–" and "E"), latter indicating an estimated, rather than determined orbital eccentricity. Furthermore, a color code is used to indicate a body's basic dynamical classification, with additional information given in columns "class" and "description and notes" (especially for near-Earth objects, Jupiter trojans and distant objects). If available, mean diameters are taken from the latest NEOWISE publication, or, if not available, estimated based on an object's absolute magnitude and displayed in italics.
In the Minor Planet Circular from July 2018, the MPC announced that changes in their data processing pipeline will enable numberings to occur more frequently. It is stated that the new method will clear the backlog of unnumbered minor planets with an already well-established orbit without changing the criteria for numbering. Previously, this was not possible because of the difficulty of determining who was the discoverer. Despite this announcement, however, the total of unnumbered minor planets has since rather than decreased.
|- id="1927 LA" bgcolor=#d6d6d6| – || 1927 LA || MBA-O || 11.0 || 35 km || single || 34 days || 05 Jul 1927 || 3 || align=left | Disc.: Heidelberg Obs.
Oldest lost asteroid || |- id="1935 UZ" bgcolor=#FA8072| E || 1935 UZ || MCA || — || — || single || 4 days || 23 Oct 1935 || 3 || align=left | Disc.: Uccle Obs. || |- id="1937 CK" bgcolor=#fefefe| – || 1937 CK || MBA-I || — || — || single || 32 days || 13 Mar 1937 || 3 || align=left | Disc.: Uccle Obs. || |- id="1939 RR" bgcolor=#d6d6d6| – || 1939 RR || MBA-O || 12.0 || 22 km || single || 27 days || 12 Oct 1939 || 3 || align=left | Disc.: Uccle Obs. || |- id="1942 RH" bgcolor=#fefefe| – || 1942 RH || MBA-I || 13.8 || 5.2 km || single || 10 days || 15 Sep 1942 || 3 || align=left | Disc.: Turku Obs. || |- id="4847 P-L" bgcolor=#fefefe| 0 || 4847 P-L || MBA-I || 18.04 || data-sort-value="0.73" | 730 m || multiple || 1960-2022 || 25 Jan 2022 || 37 || align=left | Disc.: Palomar–Leiden || |- id="6331 P-L" bgcolor=#fefefe| 0 || 6331 P-L || MBA-I || 18.5 || data-sort-value="0.59" | 590 m || multiple || 1960–2021 || 01 Dec 2021 || 86 || align=left | Disc.: Palomar–Leiden || |- id="6344 P-L" bgcolor=#FFC2E0| 1 || 6344 P-L || APO || 20.4 || data-sort-value="0.30" | 300 m || multiple || 1960–2021 || 04 Aug 2021 || 129 || align=left | Disc.: Palomar–Leiden
Potentially hazardous object || |- id="1960 SB1" bgcolor=#FA8072| 1 || || MCA || 17.91 || 1.5 km || multiple || 1960-2022 || 22 Mar 2022 || 56 || align=left | Disc.: Palomar Obs.
Alt.: 2017 CT1 || |- id="1979 MW5" bgcolor=#d6d6d6| 0 || || MBA-O || 16.47 || 2.8 km || multiple || 1979-2023 || 11 Nov 2023 || 118 || align=left | Disc.: Siding Spring
Alt.: 2011 HG10 || |- id="1979 XB" bgcolor=#FFC2E0| 9 || 1979 XB || APO || 18.6 || data-sort-value="0.68" | 680 m || single || 4 days || 15 Dec 1979 || 16 || align=left | Disc.: Siding Spring
Potentially hazardous object || |}
|- id="1981 EN35" bgcolor=#fefefe| 0 || || MBA-I || 17.46 || data-sort-value="0.96" | 960 m || multiple || 1981–2023 || 19 Nov 2023 || 209 || align=left | Disc.: Siding Spring
Alt.: 2014 FN21 || |- id="1982 YA" bgcolor=#FFC2E0| 0 || 1982 YA || AMO || 18.01 || data-sort-value="0.89" | 1 km || multiple || 1982–2017 || 03 Dec 2017 || 71 || align=left | Disc.: Haute-Provence
NEO larger than 1 kilometer
Alt.: 2003 WE42 || |- id="1983 QC" bgcolor=#FA8072| 0 || 1983 QC || MCA || 18.83 || 600 m || multiple || 1983–2018 || 11 Mar 2018 || 42 || align=left | Disc.: Palomar Obs. || |- id="1984 QL1" bgcolor=#FA8072| 0 || || MCA || 15.81 || 3.9 km || multiple || 1984–2024 || 17 Mar 2024 || 176 || align=left | Disc.: Palomar Obs.
MBA-O at JPL
Alt.: 2002 XP102, 2013 JS30 || |- id="1986 JE" bgcolor=#fefefe| 0 || 1986 JE || HUN || 18.65 || data-sort-value="0.55" | 550 m || multiple || 1986–2022 || 19 Feb 2022 || 107 || align=left | Disc.: Spacewatch
Alt.: 2005 UU548 || |- id="1986 NA" bgcolor=#FFC2E0| 0 || 1986 NA || AMO || 19.85 || data-sort-value="0.38" | 380 m || multiple || 1986–2021 || 31 Oct 2021 || 88 || align=left | Disc.: Palomar Obs.
Alt.: 2013 UU3 || |- id="1988 NE" bgcolor=#FFC2E0| 0 || 1988 NE || AMO || 19.25 || data-sort-value="0.50" | 500 m || multiple || 1988–2022 || 17 Sep 2022 || 95 || align=left | Disc.: Palomar Obs. || |- id="1988 PF1" bgcolor=#FA8072| 0 || || MCA || 16.7 || 2.5 km || multiple || 1988–2021 || 18 Jan 2021 || 331 || align=left | Disc.: Palomar Obs.
Alt.: 2009 WD77 || |- id="1988 RH9" bgcolor=#E9E9E9| – || || MBA-M || 11.1 || 25 km || single || 11 days || 12 Sep 1988 || 15 || align=left | Disc.: La Silla Obs. || |- id="1989 AZ" bgcolor=#FFC2E0| 0 || 1989 AZ || APO || 19.41 || data-sort-value="0.41" | 410 m || multiple || 1989–2024 || 14 Aug 2024 || 283 || align=left | Disc.: Palomar Obs. || |- id="1989 FR" bgcolor=#d6d6d6| E || 1989 FR || MBA-O || 13.5 || 11 km || single || 2 days || 28 Mar 1989 || 6 || align=left | Disc.: Kleť Obs. || |}
|- id="1990 HY6" bgcolor=#d6d6d6| 2 || || MBA-O || 17.75 || 1.6 km || multiple || 1990–2022 || 19 Nov 2022 || 42 || align=left | Disc.: Siding Spring
Alt.: 2012 XV90 || |- id="1990 SM24" bgcolor=#d6d6d6| 0 || || MBA-O || 16.36 || 3.0 km || multiple || 1990–2024 || 03 May 2024 || 301 || align=left | Disc.: La Silla Obs.
Alt.: 2008 GU14 || |- id="1990 UN" bgcolor=#FFC2E0| 8 || 1990 UN || APO || 23.5 || data-sort-value="0.071" | 71 m || single || 15 days || 06 Nov 1990 || 22 || align=left | Disc.: Spacewatch || |- id="1991 BA" bgcolor=#FFC2E0| 3 || 1991 BA || APO || 28.6 || data-sort-value="0.0068" | 7 m || single || 0 day || 18 Jan 1991 || 7 || align=left | Disc.: Spacewatch || |- id="1991 GK" bgcolor=#FA8072| 0 || 1991 GK || MCA || 19.43 || data-sort-value="0.39" | 390 m || multiple || 1991–2020 || 27 May 2020 || 128 || align=left | Disc.: Spacewatch
Alt.: 2020 BE6 || |- id="1991 GO" bgcolor=#FFC2E0| 0 || 1991 GO || APO || 20.1 || data-sort-value="0.34" | 340 m || multiple || 1991–2023 || 10 Jun 2023 || 94 || align=left | Disc.: Kitami Obs.
Potentially hazardous object
Alt.: 1999 HC || |- id="1991 JR" bgcolor=#FFC2E0| 7 || 1991 JR || AMO || 23.4 || data-sort-value="0.071" | 71 m || single || 11 days || 19 May 1991 || 20 || align=left | Disc.: Spacewatch || |- id="1991 PN" bgcolor=#d6d6d6| 0 || 1991 PN || MBA-O || 16.91 || 2.3 km || multiple || 1991–2023 || 08 Sep 2023 || 55 || align=left | Disc.: Cerro Tololo Obs. || |- id="1991 PW22" bgcolor=#E9E9E9| 0 || || MBA-M || 17.45 || 1.4 km || multiple || 1991–2023 || 15 Jun 2022 || 76 || align=left | Disc.: La Silla Obs.
Alt.: 2010 CU110 || |- id="1991 RN28" bgcolor=#fefefe| 2 || || MBA-I || 19.2 || data-sort-value="0.43" | 430 m || multiple || 1991–2018 || 15 Oct 2018 || 35 || align=left | Disc.: Spacewatch || |- id="1991 TT" bgcolor=#FFC2E0| 7 || 1991 TT || APO || 26.0 || data-sort-value="0.022" | 22 m || single || 3 days || 09 Oct 1991 || 8 || align=left | Disc.: Spacewatch
AMO at MPC || |- id="1991 TU" bgcolor=#FFC2E0| 6 || 1991 TU || APO || 28.4 || data-sort-value="0.0074" | 7 m || single || 0 day || 07 Oct 1991 || 4 || align=left | Disc.: Spacewatch || |- id="1991 TY10" bgcolor=#E9E9E9| 0 || || MBA-M || 17.1 || 1.6 km || multiple || 1991–2021 || 07 Apr 2021 || 128 || align=left | Disc.: Spacewatch
Alt.: 2011 PM15 || |- id="1991 TM16" bgcolor=#FA8072| 0 || || MCA || 17.36 || 1.4 km || multiple || 1991–2021 || 07 Feb 2021 || 83 || align=left | Disc.: Palomar–DSS
Alt.: 2017 AB3 || |- id="1991 VA" bgcolor=#FFC2E0| – || 1991 VA || APO || 26.5 || data-sort-value="0.018" | 18 m || single || 8 days || 09 Nov 1991 || 13 || align=left | Disc.: Spacewatch || |- id="1991 VD" bgcolor=#FA8072| E || 1991 VD || HUN || 19.5 || data-sort-value="0.37" | 370 m || single || 2 days || 06 Nov 1991 || 9 || align=left | Disc.: Spacewatch || |- id="1991 VG" bgcolor=#FFC2E0| 0 || 1991 VG || APO || 28.3 || data-sort-value="0.0078" | 8 m || multiple || 1991–2017 || 01 Jun 2017 || 66 || align=left | Disc.: Spacewatch || |- id="1991 XA" bgcolor=#FFC2E0| 8 || 1991 XA || APO || 23.7 || data-sort-value="0.065" | 65 m || single || 12 days || 15 Dec 1991 || 7 || align=left | Disc.: Spacewatch || |- id="1991 XB" bgcolor=#FFC2E0| 1 || 1991 XB || AMO || 18.8 || data-sort-value="0.62" | 620 m || multiple || 1991–2011 || 24 Jul 2011 || 38 || align=left | Disc.: Palomar Obs. || |- id="1992 DU" bgcolor=#FFC2E0| 7 || 1992 DU || APO || 25.3 || data-sort-value="0.031" | 31 m || single || 3 days || 29 Feb 1992 || 11 || align=left | Disc.: Spacewatch || |- id="1992 JD" bgcolor=#FFC2E0| 5 || 1992 JD || APO || 25.0 || data-sort-value="0.036" | 36 m || single || 6 days || 09 May 1992 || 23 || align=left | Disc.: Spacewatch
AMO at MPC || |- id="1992 SW" bgcolor=#FA8072| 0 || 1992 SW || MCA || 19.93 || data-sort-value="0.30" | 300 m || multiple || 1992–2024 || 09 Aug 2024 || 55 || align=left | Disc.: Spacewatch || |- id="1992 SX" bgcolor=#FA8072| – || 1992 SX || MCA || 20.0 || data-sort-value="0.30" | 300 m || single || 7 days || 04 Oct 1992 || 14 || align=left | Disc.: Spacewatch || |- id="1992 SZ" bgcolor=#FFC2E0| 0 || 1992 SZ || AMO || 19.97 || data-sort-value="0.35" | 350 m || multiple || 1992–2024 || 02 Jun 2024 || 70 || align=left | Disc.: Spacewatch || |- id="1992 SN4" bgcolor=#E9E9E9| 0 || || MBA-M || 18.55 || data-sort-value="0.82" | 820 m || multiple || 1992–2022 || 27 Jan 2022 || 65 || align=left | Disc.: Spacewatch || |- id="1992 SC8" bgcolor=#E9E9E9| 0 || || MBA-M || 18.38 || data-sort-value="0.89" | 890 m || multiple || 1992–2021 || 30 Nov 2021 || 82 || align=left | Disc.: Spacewatch
Alt.: 2017 WV33 || |- id="1992 SW11" bgcolor=#fefefe| 1 || || MBA-I || 17.28 || 1.0 km || multiple || 1992–2023 || 20 Aug 2023 || 24 || align=left | Disc.: Spacewatch || |- id="1992 SB12" bgcolor=#fefefe| 2 || || MBA-I || 18.9 || data-sort-value="0.49" | 490 m || multiple || 1992–2022 || 07 Jan 2022 || 29 || align=left | Disc.: Spacewatch
Alt.: 2017 SW186 || |- id="1992 SZ17" bgcolor=#E9E9E9| E || || MBA-M || 13.8 || 7.3 km || single || 4 days || 03 Oct 1992 || 6 || align=left | Disc.: Palomar Obs. || |- id="1992 TY1" bgcolor=#d6d6d6| E || || MBA-O || 12.8 || 15 km || single || 3 days || 05 Oct 1992 || 5 || align=left | Disc.: Kitt Peak Obs. || |- id="1992 TZ1" bgcolor=#fefefe| – || || MBA-I || 15.5 || 2.4 km || single || 4 days || 05 Oct 1992 || 5 || align=left | Disc.: Kitt Peak Obs. || |- id="1992 XA" bgcolor=#d6d6d6| 1 || 1992 XA || MBA-O || 17.5 || 1.8 km || multiple || 1992–2018 || 13 Dec 2018 || 161 || align=left | Disc.: Spacewatch
Alt.: 2005 UG242 || |- id="1992 YD3" bgcolor=#FFC2E0| 4 || || APO || 26.4 || data-sort-value="0.019" | 19 m || single || 0 day || 27 Dec 1992 || 12 || align=left | Disc.: Spacewatch
AMO at MPC || |}
|- id="1993 BD3" bgcolor=#FFC2E0| 7 || || AMO || 26.2 || data-sort-value="0.020" | 20 m || single || 5 days || 31 Jan 1993 || 14 || align=left | Disc.: Spacewatch || |- id="1993 BU3" bgcolor=#FFC2E0| 7 || || AMO || 21.17 || data-sort-value="0.21" | 210 m || single || 33 days || 03 Mar 1993 || 18 || align=left | Disc.: Spacewatch || |- id="1993 BC10" bgcolor=#E9E9E9| 1 || || MBA-M || 18.58 || data-sort-value="0.80" | 800 m || multiple || 1993–2024 || 12 Aug 2024 || 58 || align=left | Disc.: Spacewatch|| |- id="1993 DA" bgcolor=#FFC2E0| 6 || 1993 DA || ATE || 26.4 || data-sort-value="0.019" | 19 m || single || 5 days || 22 Feb 1993 || 18 || align=left | Disc.: Spacewatch || |- id="1993 FA1" bgcolor=#FFC2E0| 7 || || APO || 25.9 || data-sort-value="0.023" | 23 m || single || 3 days || 31 Mar 1993 || 17 || align=left | Disc.: Spacewatch
AMO at MPC || |- id="1993 FB85" bgcolor=#E9E9E9| 0 || || MBA-M || 17.6 || 1.3 km || multiple || 1993–2022 || 29 Oct 2022 || 64 || align=left | Disc.: Spacewatch
Alt.: 2002 GO188 || |- id="1993 FE85" bgcolor=#E9E9E9| 0 || || MBA-M || 17.69 || 1.2 km || multiple || 1993–2022 || 29 Nov 2022 || 101 || align=left | Disc.: Spacewatch || |- id="1993 HC" bgcolor=#FFC2E0| 0 || 1993 HC || APO || 20.77 || data-sort-value="0.25" | 250 m || multiple || 1993–2021 || 07 May 2021 || 58 || align=left | Disc.: Spacewatch || |- id="1993 HP1" bgcolor=#FFC2E0| 3 || || APO || 27.1 || data-sort-value="0.014" | 14 m || single || 0 day || 27 Apr 1993 || 27 || align=left | Disc.: Spacewatch || |- id="1993 KA" bgcolor=#FFC2E0| – || 1993 KA || APO || 26.0 || data-sort-value="0.022" | 22 m || single || 9 days || 26 May 1993 || 21 || align=left | Disc.: Spacewatch
AMO at MPC || |- id="1993 KA2" bgcolor=#FFC2E0| 9 || || APO || 29.0 || data-sort-value="0.0056" | 6 m || single || 1 day || 22 May 1993 || 14 || align=left | Disc.: Spacewatch || |- id="1993 ME1" bgcolor=#FA8072| 0 || || MCA || 16.89 || 1.8 km || multiple || 1993–2023 || 26 Jul 2023 || 244 || align=left | Disc.: Palomar Obs. || |- id="1993 OT" bgcolor=#FA8072| – || 1993 OT || MCA || 19.0 || data-sort-value="0.47" | 470 m || single || 20 days || 13 Aug 1993 || 9 || align=left | Disc.: Spacewatch || |- id="1993 OM1" bgcolor=#E9E9E9| 0 || || MBA-M || 17.54 || 1.3 km || multiple || 1993–2023 || 24 Apr 2023 || 59 || align=left | Disc.: Spacewatch
Alt.: 2015 MT193 || |- id="1993 OW5" bgcolor=#E9E9E9| 0 || || MBA-M || 17.33 || 1.4 km || multiple || 1993–2022 || 28 Oct 2022 || 252 || align=left | Disc.: La Silla Obs. || |- id="1993 OP9" bgcolor=#fefefe| 0 || || MBA-I || 17.82 || data-sort-value="0.81" | 810 m || multiple || 1993–2022 || 24 Dec 2022 || 124 || align=left | Disc.: La Silla Obs.
Alt.: 2004 TH237 || |- id="1993 OY13" bgcolor=#fefefe| 1 || || MBA-I || 18.84 || data-sort-value="0.51" | 510 m || multiple || 1993–2022 || 19 Nov 2022 || 35 || align=left | Disc.: Spacewatch || |- id="1993 PA1" bgcolor=#fefefe| 0 || || MBA-I || 18.73 || data-sort-value="0.53" | 530 m || multiple || 1993–2023 || 13 Jan 2023 || 60 || align=left | Disc.: Spacewatch
Alt.: 2009 QA32 || |- id="1993 PK1" bgcolor=#fefefe| 0 || || MBA-I || 18.87 || data-sort-value="0.51" | 510 m || multiple || 1993–2023 || 22 Oct 2023 || 69 || align=left | Disc.: Spacewatch || |- id="1993 RP" bgcolor=#C2E0FF| 3 || 1993 RP || TNO || 9.37 || 59 km || multiple || 1993-2016 || 02 Nov 2016 || 37 || align=left | Disc.: Mauna Kea Obs.
LoUTNOs, res4:5
Alt.: 2015 VR202 || |- id="1993 SZ16" bgcolor=#d6d6d6| 0 || || MBA-O || 16.44 || 2.9 km || multiple || 1993–2023 || 23 Jan 2023 || 171 || align=left | Disc.: Spacewatch || |- id="1993 TZ" bgcolor=#FFC2E0| 1 || 1993 TZ || APO || 26.0 || data-sort-value="0.022" | 22 m || multiple || 1993–2016 || 14 Oct 2016 || 34 || align=left | Disc.: Spacewatch || |- id="1993 TR2" bgcolor=#FA8072| – || || MCA || 20.4 || data-sort-value="0.35" | 350 m || single || 12 days || 24 Oct 1993 || 15 || align=left | Disc.: Spacewatch || |- id="1993 TK4" bgcolor=#E9E9E9| 0 || || MBA-M || 18.8 || data-sort-value="0.76" | 740 m || multiple || 1993–2023 || 03 Sep 2023 || 46 || align=left | Disc.: Spacewatch
Alt.: 2019 SY43 || |- id="1993 TQ4" bgcolor=#fefefe| 0 || || MBA-I || 18.06 || data-sort-value="0.73" | 730 m || multiple || 1993–2023 || 16 Apr 2023 || 45 || align=left | Disc.: Spacewatch || |- id="1993 TP6" bgcolor=#fefefe| 0 || || MBA-I || 19.2 || data-sort-value="0.43" | 430 m || multiple || 1993–2022 || 27 Nov 2022 || 79 || align=left | Disc.: Spacewatch || |- id="1993 TL8" bgcolor=#E9E9E9| 0 || || MBA-M || 17.37 || 1.4 km || multiple || 1993–2021 || 07 Nov 2021 || 86 || align=left | Disc.: Spacewatch
Alt.: 2012 UH179 || |- id="1993 TC11" bgcolor=#E9E9E9| 0 || || MBA-M || 19.45 || data-sort-value="0.54" | 540 m || multiple || 1993–2022 || 29 Oct 2022 || 78 || align=left | Disc.: Spacewatch || |- id="1993 TC45" bgcolor=#E9E9E9| 0 || || MBA-M || 17.95 || 1.1 km || multiple || 1993–2023 || 13 Jan 2023 || 200 || align=left | Disc.: La Silla Obs.
Alt.: 2007 BY108 || |- id="1993 UA" bgcolor=#FFC2E0| 6 || 1993 UA || APO || 25.4 || data-sort-value="0.030" | 30 m || single || 3 days || 24 Oct 1993 || 15 || align=left | Disc.: Spacewatch || |- id="1993 UD" bgcolor=#FFC2E0| 0 || 1993 UD || AMO || 20.38 || data-sort-value="0.30" | 300 m || multiple || 1993–2022 || 15 Dec 2022 || 68 || align=left | Disc.: Spacewatch || |- id="1993 UY7" bgcolor=#FA8072| 0 || 1993 UY7 || MCA || 18.75 || data-sort-value="0.53" | 530 m || multiple || 1993-2022 || 23 Oct 2022 || 52 || align=left | Disc.: Spacewatch
Alt.: 2015 XV465 || |- id="1993 VC" bgcolor=#FA8072| 1 || 1993 VC || MCA || 20.5 || data-sort-value="0.33" | 330 m || multiple || 1993–2007 || 11 Nov 2007 || 34 || align=left | Disc.: Spacewatch || |- id="1993 VE6" bgcolor=#fefefe| 0 || || MBA-I || 19.16 || data-sort-value="0.44" | 440 m || multiple || 1993–2022 || 07 Apr 2022 || 49 || align=left | Disc.: Spacewatch
Alt.: 2003 SE413 || |}
The year of principal provisional designation for most unnumbered minor planets is younger than 2004 (see ). They are not listed in any of the partial lists due to their large number and frequent changes. New partial lists may be created in the future, as additional observations ultimately lead to new numberings and to fewer unnumbered bodies.