List of unnumbered minor planets: 2003 S (270–389)

This is a partial list of unnumbered minor planets for principal provisional designations assigned during 16–30 September 2003. Since this period yielded a high number of provisional discoveries, it is further split into several standalone pages. , a total of 194 bodies remain unnumbered for this period. Objects for this year are listed on the following pages: A–E · F–G · H–L · M–R · Si · Sii · Siii · Siv · T · Ui · Uii · Uiii · Uiv · V · Wi · Wii and X–Y. Also see previous and next year.

S

|- id="2003 SZ274" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.9 || data-sort-value="0.92" | 920 m || multiple || 2003–2017 || 08 Dec 2017 || 23 || align=left | Disc.: Spacewatch || |- id="2003 SC276" bgcolor=#fefefe | 1 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 2003–2017 || 21 Nov 2017 || 33 || align=left | Disc.: SpacewatchAlt.: 2010 VJ42 || |- id="2003 SN276" bgcolor=#E9E9E9 | 2 || || MBA-M || 18.0 || 1.4 km || multiple || 2003–2021 || 06 Oct 2021 || 48 || align=left | Disc.: Spacewatch || |- id="2003 SE279" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.22 || 1.3 km || multiple || 2003–2021 || 08 Sep 2021 || 28 || align=left | Disc.: LPL/Spacewatch IIAdded on 19 October 2020 || |- id="2003 SG287" bgcolor=#E9E9E9 | 0 || || MBA-M || 19.1 || data-sort-value="0.84" | 840 m || multiple || 2003–2017 || 08 Dec 2017 || 20 || align=left | Disc.: Spacewatch || |- id="2003 SP287" bgcolor=#d6d6d6 | 3 || || MBA-O || 18.2 || 1.3 km || multiple || 2003–2019 || 23 Oct 2019 || 22 || align=left | Disc.: LPL/Spacewatch IIAdded on 17 January 2021 || |- id="2003 SQ287" bgcolor=#fefefe | 0 || || MBA-I || 19.29 || data-sort-value="0.41" | 410 m || multiple || 2003–2020 || 14 Dec 2020 || 48 || align=left | Disc.: LPL/Spacewatch IIAdded on 17 January 2021Alt.: 2013 PJ52 || |- id="2003 SD288" bgcolor=#E9E9E9 | 0 || || MBA-M || 19.1 || data-sort-value="0.64" | 640 m || multiple || 2003–2020 || 17 Nov 2020 || 30 || align=left | Disc.: Spacewatch || |- id="2003 ST289" bgcolor=#fefefe | 1 || || MBA-I || 18.9 || data-sort-value="0.49" | 490 m || multiple || 2003–2020 || 11 Dec 2020 || 90 || align=left | Disc.: LONEOS || |- id="2003 SF302" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.8 || data-sort-value="0.82" | 820 m || multiple || 2003–2012 || 23 Dec 2012 || 22 || align=left | Disc.: NEATAlt.: 2011 OR54 || |- id="2003 SV310" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.4 || data-sort-value="0.88" | 880 m || multiple || 2003–2020 || 16 Nov 2020 || 99 || align=left | Disc.: LINEARAlt.: 2016 TH130 || |- id="2003 SY314" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.39 || 2.0 km || multiple || 2003-2024 || 30 Sep 2024 || 126 || align=left | Disc.: LINEAR || |- id="2003 SO316" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.1 || 2.1 km || multiple || 2003–2020 || 13 Sep 2020 || 29 || align=left | Disc.: LPL/Spacewatch IIAdded on 17 January 2021 || |- id="2003 SK317" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.9 || 1.5 km || multiple || 2000–2019 || 23 Oct 2019 || 40 || align=left | Disc.: Spacewatch || |- id="2003 SO317" bgcolor=#C2E0FF | 4 || || TNO || 8.12 || 112 km || multiple || 2001–2021 || 05 Nov 2021 || 39 || align=left | Disc.: Mauna Kea Obs.LoUTNOs, plutino || |- id="2003 SG323" bgcolor=#fefefe | 1 || || MBA-I || 19.35 || data-sort-value="0.40" | 400 m || multiple || 2003–2019 || 24 Dec 2019 || 28 || align=left | Disc.: Spacewatch || |- id="2003 SW323" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.72 || data-sort-value="0.61" | 610 m || multiple || 2003-2021 || 25 Nov 2021 || 30 || align=left | Disc.: Spacewatch || |- id="2003 SH325" bgcolor=#fefefe | 0 || || MBA-I || 19.28 || data-sort-value="0.37" | 370 m || multiple || 2003-2022 || 20 Dec 2022 || 69 || align=left | Disc.: Spacewatch || |- id="2003 SQ325" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.2 || data-sort-value="0.68" | 680 m || multiple || 2003–2021 || 10 Jan 2021 || 40 || align=left | Disc.: NEAT || |- id="2003 SU326" bgcolor=#d6d6d6 | 0 || || HIL || 16.6 || 2.7 km || multiple || 2003–2020 || 24 Dec 2020 || 47 || align=left | Disc.: Spacewatch || |- id="2003 SA327" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.92 || data-sort-value="0.92" | 920 m || multiple || 2003–2021 || 24 Oct 2021 || 67 || align=left | Disc.: Spacewatch || |- id="2003 SH327" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.12 || data-sort-value="0.57" | 570 m || multiple || 2003-2024 || 03 Dec 2024 || 33 || align=left | Disc.: Spacewatch || |- id="2003 SN328" bgcolor=#fefefe | 0 || || MBA-I || 18.28 || data-sort-value="0.65" | 650 m || multiple || 2003-3033 || 27 Dec 2022 || 108 || align=left | Disc.: LONEOS || |- id="2003 SF329" bgcolor=#fefefe | 0 || || MBA-I || 18.4 || data-sort-value="0.62" | 620 m || multiple || 2003–2018 || 12 Jul 2018 || 40 || align=left | Disc.: LONEOS || |- id="2003 SQ329" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.56 || 1.1 km || multiple || 2003–2021 || 27 Oct 2021 || 96 || align=left | Disc.: LPL/Spacewatch II || |- id="2003 SQ330" bgcolor=#fefefe | 0 || || MBA-I || 19.2 || data-sort-value="0.43" | 430 m || multiple || 2003–2016 || 27 Dec 2016 || 27 || align=left | Disc.: SDSS || |- id="2003 SR330" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.3 || data-sort-value="0.65" | 650 m || multiple || 2003–2019 || 28 Aug 2019 || 38 || align=left | Disc.: SDSS || |- id="2003 SV330" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.7 || data-sort-value="0.76" | 760 m || multiple || 2003–2020 || 14 Oct 2020 || 58 || align=left | Disc.: SDSS || |- id="2003 SY330" bgcolor=#fefefe | 0 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 2003–2017 || 17 Nov 2017 || 102 || align=left | Disc.: SDSSAlt.: 2010 MK24 || |- id="2003 SA331" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.9 || 1.5 km || multiple || 2003–2020 || 23 Dec 2020 || 38 || align=left | Disc.: SDSSAlt.: 2014 XD20 || |- id="2003 SY331" bgcolor=#fefefe | 0 || || MBA-I || 19.01 || data-sort-value="0.47" | 470 m || multiple || 2003–2021 || 02 Oct 2021 || 37 || align=left | Disc.: SDSSAlt.: 2014 WJ87 || |- id="2003 SQ332" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.17 || 2.0 km || multiple || 2003–2021 || 06 Dec 2021 || 231 || align=left | Disc.: SDSSAlt.: 2012 QF15 || |- id="2003 SU332" bgcolor=#fefefe | 0 || || MBA-I || 18.6 || data-sort-value="0.82" | 820 m || multiple || 2003-3030 || 17 Jul 2020 || 36 || align=left | Disc.: Spacewatch || |- id="2003 SV332" bgcolor=#d6d6d6 | 0 || || HIL || 16.6 || 2.7 km || multiple || 1995–2019 || 08 Nov 2019 || 66 || align=left | Disc.: SpacewatchAlt.: 2011 UL222 || |- id="2003 SQ333" bgcolor=#fefefe | 0 || || MBA-I || 19.31 || data-sort-value="0.41" | 410 m || multiple || 2003–2021 || 09 Dec 2021 || 60 || align=left | Disc.: SDSS || |- id="2003 SV333" bgcolor=#FA8072 | 0 || || MCA || 18.80 || data-sort-value="0.52" | 520 m || multiple || 2003–2019 || 24 Jul 2019 || 91 || align=left | Disc.: SDSS || |- id="2003 SR335" bgcolor=#fefefe | 2 || || MBA-I || 19.3 || data-sort-value="0.43" | 430 m || multiple || 2003-2022 || 19 Oct 2022 || 39 || align=left | Disc.: SDSS || |- id="2003 SW335" bgcolor=#FA8072 | 0 || || MCA || 20.0 || data-sort-value="0.30" | 300 m || multiple || 2003–2020 || 10 Dec 2020 || 53 || align=left | Disc.: SDSSAlt.: 2010 XE87 || |- id="2003 SB336" bgcolor=#E9E9E9 | 0 || || MBA-M || 19.0 || data-sort-value="0.67" | 670 m || multiple || 2003–2021 || 03 Jan 2021 || 86 || align=left | Disc.: SDSS || |- id="2003 SV336" bgcolor=#fefefe | 2 || || MBA-I || 19.16 || data-sort-value="0.33" | 330 m || multiple || 2003-2023 || 16 Nov 2023 || 48 || align=left | Disc.: SDSS || |- id="2003 SX336" bgcolor=#d6d6d6 | 0 || || HIL || 16.1 || 3.4 km || multiple || 2003–2019 || 24 Dec 2019 || 45 || align=left | Disc.: SDSS || |- id="2003 SE337" bgcolor=#d6d6d6 | 0 || || MBA-O || 18.1 || 1.3 km || multiple || 2003–2020 || 09 Dec 2020 || 31 || align=left | Disc.: SDSS || |- id="2003 SW338" bgcolor=#fefefe | 0 || || MBA-I || 19.06 || data-sort-value="0.46" | 460 m || multiple || 2002–2021 || 27 Nov 2021 || 58 || align=left | Disc.: SDSSAlt.: 2014 VM21 || |- id="2003 SA340" bgcolor=#E9E9E9 | 0 || || MBA-M || 17.9 || data-sort-value="0.78" | 780 m || multiple || 2003–2020 || 16 Dec 2020 || 49 || align=left | Disc.: SDSS || |- id="2003 SE340" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.5 || 1.8 km || multiple || 2003–2020 || 20 Oct 2020 || 65 || align=left | Disc.: SDSS || |- id="2003 SW340" bgcolor=#fefefe | 0 || || MBA-I || 19.23 || data-sort-value="0.42" | 420 m || multiple || 2003–2021 || 26 Oct 2021 || 58 || align=left | Disc.: SpacewatchAdded on 21 August 2021 || |- id="2003 SA341" bgcolor=#d6d6d6 | 2 || || MBA-O || 17.9 || 1.5 km || multiple || 2003–2019 || 25 Sep 2019 || 27 || align=left | Disc.: SpacewatchAlt.: 2019 PM30 || |- id="2003 SV341" bgcolor=#E9E9E9 | 0 || = (887227) || MBA-M || 17.8 || data-sort-value="0.82" | 820 m || multiple || 2003–2021 || 07 Jan 2021 || 21 || align=left | Disc.: Spacewatch || |- id="2003 SW341" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.1 || 2.1 km || multiple || 2003–2019 || 22 Oct 2019 || 45 || align=left | Disc.: Spacewatch || |- id="2003 SX341" bgcolor=#fefefe | 2 || || MBA-I || 19.1 || data-sort-value="0.45" | 450 m || multiple || 2003–2016 || 06 Oct 2016 || 27 || align=left | Disc.: Spacewatch || |- id="2003 SY343" bgcolor=#FA8072 | 1 || || MCA || 19.9 || data-sort-value="0.31" | 310 m || multiple || 2003–2017 || 22 Oct 2017 || 27 || align=left | Disc.: Spacewatch || |- id="2003 SO344" bgcolor=#fefefe | 0 || || MBA-I || 18.5 || data-sort-value="0.59" | 590 m || multiple || 2003–2020 || 20 Jul 2020 || 52 || align=left | Disc.: Spacewatch || |- id="2003 SJ345" bgcolor=#E9E9E9 | – || || MBA-M || 19.1 || data-sort-value="0.45" | 450 m || single || 11 days || 29 Sep 2003 || 9 || align=left | Disc.: Spacewatch || |- id="2003 SW345" bgcolor=#E9E9E9 | 1 || || MBA-M || 17.8 || 1.5 km || multiple || 2003–2017 || 13 Nov 2017 || 32 || align=left | Disc.: Spacewatch || |- id="2003 SB346" bgcolor=#d6d6d6 | 2 || || MBA-O || 18.09 || 1.2 km || multiple || 2003-2023 || 12 Oct 2023 || 37 || align=left | Disc.: Spacewatch || |- id="2003 SD346" bgcolor=#E9E9E9 | 1 || || MBA-M || 18.73 || 1.0 km || multiple || 2003–2021 || 06 Oct 2021 || 41 || align=left | Disc.: Spacewatch || |- id="2003 SU346" bgcolor=#E9E9E9 | 1 || || MBA-M || 19.0 || data-sort-value="0.67" | 670 m || multiple || 2003–2020 || 10 Aug 2020 || 51 || align=left | Disc.: Spacewatch || |- id="2003 SY346" bgcolor=#fefefe | 0 || || MBA-I || 18.8 || data-sort-value="0.52" | 520 m || multiple || 2003–2018 || 10 Nov 2018 || 56 || align=left | Disc.: SpacewatchAlt.: 2007 VA164 || |- id="2003 SZ346" bgcolor=#d6d6d6 | 3 || || MBA-O || 18.97 || data-sort-value="0.92" | 920 m || multiple || 2003-2024 || 24 Oct 2024 || 26 || align=left | Disc.: Spacewatch || |- id="2003 SA347" bgcolor=#d6d6d6 | 1 || || MBA-O || 17.4 || 1.8 km || multiple || 2003–2021 || 16 Jan 2021 || 25 || align=left | Disc.: Spacewatch || |- id="2003 SG347" bgcolor=#fefefe | 1 || || MBA-I || 18.85 || data-sort-value="0.52" | 520 m || multiple || 2003-2022 || 26 Nov 2022 || 24 || align=left | Disc.: Spacewatch || |- id="2003 SK347" bgcolor=#E9E9E9 | 0 || || MBA-M || 19.0 || data-sort-value="0.67" | 670 m || multiple || 2003–2020 || 16 Sep 2020 || 76 || align=left | Disc.: SpacewatchAlt.: 2016 WE50 || |- id="2003 SO347" bgcolor=#E9E9E9 | 2 || || MBA-M || 19.6 || data-sort-value="0.51" | 510 m || multiple || 2003–2020 || 17 Oct 2020 || 34 || align=left | Disc.: SpacewatchAlt.: 2020 PV36 || |- id="2003 SE348" bgcolor=#E9E9E9 | 0 || || MBA-M || 18.6 || data-sort-value="0.80" | 800 m || multiple || 2003–2021 || 05 Jan 2021 || 48 || align=left | Disc.: SpacewatchAdded on 11 May 2021Alt.: 2020 QG44 || |- id="2003 SG348" bgcolor=#fefefe | – || || MBA-I || 20.0 || data-sort-value="0.30" | 300 m || single || 11 days || 29 Sep 2003 || 12 || align=left | Disc.: Spacewatch || |- id="2003 SH348" bgcolor=#d6d6d6 | 0 || || MBA-O || 17.2 || 2.0 km || multiple || 2003–2021 || 22 Jan 2021 || 30 || align=left | Disc.: SpacewatchAlt.: 2016 CZ115 ||