| Comet Designation | Comet Name | Discovery Observation | Discovery Announced | IAUC | Date of Naming | IAUC - MPEC | Notes |
| C/2000 G3 | C/SOHO | 2000 Apr 10 | 2003 Jan 29 | 8073 | 2003 Jan 29 | B42 | Disc by Kracht |
| C/2002 V3 | C/SOHO | 2002 Nov 9 | 2003 Jan 29 | 8073 | 2003 Jan 29 | B42 | Disc by Evans |
| C/2002 V4 | C/SOHO | 2002 Nov 9 | 2003 Jan 29 | 8073 | 2003 Jan 29 | B42 | Disc by Kracht |
| C/2002 V5 | C/SOHO | 2002 Nov 11 | 2003 Feb 3 | 8073 | 2003 Feb 3 | C02 | Disc by Matson |
| C/2002 X6 | C/SOHO | 2002 Dec 2 | 2003 Feb 3 | 8073 | 2003 Feb 3 | C02 | Disc by Kracht |
| C/2002 Y2 | C/SOHO | 2002 Dec 19 | 2003 Feb 3 | 8073 | 2003 Feb 3 | C02 | Disc by Matson |
| C/2003 B1 | C/SOHO | 2003 Jan 16 | 2003 Feb 4 | 8065 | 2003 Feb 4 | C23 | Disc by Zhou |
| C/2003 A2 | C/Gleason | 2003 Jan 10 | 2003 Jan 15 | 8049 | 2003 Feb 8 | C47 | Possible Centaur |
| P/2003 CP7 | P/LINEAR-NEAT | 2003 Mar 10 | 2003 Mar 12 | 8092 | 2003 Mar 12 | 8092 | Linked to asteroidal object 2003 CP7. |
| C/2003 E1 | C/NEAT | 2003 Mar 9 | 2003 Mar 12 | 8092 | 2003 Mar 12 | 8092 | |
| C/2002 V6 | C/SOHO | 2002 Nov 13 | 2003 Mar 19 | 8099 | 2003 Mar 19 | F14 | Disc by Cernis |
| C/2002 V7 | C/SOHO | 2002 Nov 15 | 2003 Mar 19 | 8099 | 2003 Mar 19 | F14 | Disc by Matson |
| C/2002 W1 | C/SOHO | 2002 Nov 16 | 2003 Mar 21 | 8100 | 2003 Mar 21 | F16 | Disc by Zhou |
| C/2002 W2 | C/SOHO | 2002 Nov 17 | 2003 Mar 21 | 8100 | 2003 Mar 21 | F16 | Disc by Kracht |
| C/2002 W3 | C/SOHO | 2002 Nov 18 | 2003 Mar 21 | 8100 | 2003 Mar 21 | F18 | Disc by Kracht |
| C/2002 W4 | C/SOHO | 2002 Nov 19 | 2003 Mar 21 | 8100 | 2003 Mar 21 | F18 | Disc by Meyer |
| C/2003 F1 | C/LINEAR | 2003 Mar 23 | 2003 Mar 25 | 8098 | 2003 Mar 25 | 8098 | Asteroidal; Multiple obs. from NEO Conf. Page |
| C/2002 W5 | C/SOHO | 2002 Nov 19 | 2003 Mar 27 | 8103 | 2003 Mar 27 | F45 | Disc by Hoenig |
| P/2003 F2 | P/NEAT | 2003 Mar 27 | 2003 Apr 1 | 8104 | 2003 Apr 1 | 8104 | Asteroidal; Masi from NEO Conf. Page |
| C/2002 W6 | C/SOHO | 2002 Nov 20 | 2003 Apr 2 | 8106 | 2003 Apr 2 | G07 | Disc by Matson |
| C/2002 W7 | C/SOHO | 2002 Nov 21 | 2003 Apr 2 | 8106 | 2003 Apr 2 | G07 | Disc by Evans |
| C/2002 W8 | C/SOHO | 2002 Nov 22 | 2003 Apr 8 | 8111 | 2003 Apr 8 | G32 | Disc by Cernis |
| C/2003 G1 | C/LINEAR | 2003 Apr 8 | 2003 Apr 10 | 8115 | 2003 Apr 10 | 8115 | Asteroidal; Multiple obs. from NEO Conf. Page |
| C/2003 G2 | C/LINEAR | 2003 Apr 8 | 2003 Apr 11 | 8116 | 2003 Apr 11 | 8116 | Disc by Manguso |
| C/2003 G3 | C/SOHO | 2003 Apr 4 | 2003 Apr 12 | 2003 Apr 12 | G63 | Disc by Sachs | |
| C/2003 H1 | C/LINEAR | 2003 Apr 24 | 2003 Apr 25 | 8122 | 2003 Apr 25 | 8122 | Asteroidal; Mikuz, Kusnirak, and Spahr from NEO Conf. Page |
| C/2003 H2 | C/LINEAR | 2003 Apr 24 | 2003 Apr 25 | 8122 | 2003 Apr 25 | 8122 | Asteroidal; Mikuz, Tichy, and Kusnirak from NEO Conf. Page |
| C/2003 H3 | C/NEAT | 2003 Apr 30 | 2003 May 1 | 8126 | 2003 May 1 | 8126 | Disc by Pravdo |
| P/2003 H4 | P/LINEAR | 2003 Apr 29 | 2003 May 2 | 8127 | 2003 May 2 | 8127 | Disc by Bezpalko |
| C/2003 J1 | C/NEAT | 2003 May 13 | 2003 May 17 | 8133 | 2003 May 17 | 8133 | Lawrence from NEO Conf Page |
| C/2003 K1 | C/Spacewatch | 2003 May 23 | 2003 May 24 | 8135 | 2003 May 24 | 8135 | Asteroidal; Coma disc by Lopez and Pacheco |
| C/2003 K2 | C/Christensen | 2003 May 26 | 2003 May 27 | 8136 | 2003 May 27 | 8136 | Christensen from Catalina Sky Survey |
| C/2003 K3 | C/SOHO | 2003 May 25 | 2003 May 30 | 8138 | 2003 May 29 | K46 | Disc by Otterstedt |
| C/2003 K4 | C/LINEAR | 2003 May 28 | 2003 May 30 | 8139 | 2003 May 30 | 8139 | Asteroidal; Coma disc by Young |
| C/2003 KV2 | C/LINEAR | 2003 May 23 | 2003 May 30 | 8139 | 2003 May 30 | 8139 | Asteroidal; Coma disc by Brinkworth and Burleigh |
| P/2003 L1 | P/Scotti | 2003 Jun 4 | 2003 Jun 7 | 8145 | 2003 Jun 7 | 8145 | Scotti from Spacewatch |
| C/2003 L2 | C/LINEAR | 2003 Jun 12 | 2003 Jun 14 | 8151 | 2003 Jun 14 | 8151 | Asteroidal; Coma disc by Sanchez, Stoss, & Nomen, and Gajdos |
| P/2003 HT15 | P/LINEAR | 2003 Jun 24 | 2003 Jun 25 | 8156 | 2003 Jun 25 | 8156 | Asteroidal; Coma disc by Hergenrother |
| P/2003 O1 | P/LINEAR | 2003 Jul 19 | 2003 Jul 30 | 8170 | 2003 Jul 30 | 8170 | Asteroidal; Coma disc by Kusnirak and Birtwhistle |
| P/2003 O2 | P/LINEAR | 2003 Jul 29 | 2003 Jul 31 | 8172 | 2003 Jul 31 | 8172 | Disc by Bezpalko |
| P/2003 H5 | C/SOHO | 2003 Apr 27 | 2003 Aug 1 | P02 | 2003 Aug 1 | P02 | Disc by Kracht |
| P/2003 H6 | C/SOHO | 2003 Apr 30 | 2003 Aug 1 | P02 | 2003 Aug 1 | P02 | Disc by Kracht |
| P/2003 H7 | C/SOHO | 2003 Apr 30 | 2003 Aug 1 | P02 | 2003 Aug 1 | P02 | Disc by Kracht |
| P/2003 K5 | C/SOHO | 2003 May 21 | 2003 Aug 1 | P02 | 2003 Aug 1 | P02 | Disc by Leprette |
| P/2003 K6 | C/SOHO | 2003 May 30 | 2003 Aug 1 | P02 | 2003 Aug 1 | P02 | Disc by Zhou |
| P/2003 O3 | P/LINEAR | 2003 Jul 30 | 2003 Aug 5 | 8174 | 2003 Aug 5 | 8174 | Asteroidal; Multiple obs. from NEO Conf. Page |
| P/2003 QX29 | P/NEAT | 2003 Aug 23 | 2003 Sep 2 | 8192 | 2003 Sep 2 | 8192 | Asteroidal; Coma disc by Griffin and Huerta and Young |
| C/2002 CE10 | C/LINEAR | 2002 Feb 6 | 2002 Feb 13 | 2002 C83 | 2002 Feb 13 | 2002 C83 | Asteroidal; Coma disc by Takato, Sekiguchi, and Watanabe |
| C/2002 VQ94 | C/LINEAR | 2002 Nov 11 | 2002 Nov 15 | 2002 V71 | 2002 Nov 15 | 2002 V71 | Asteroidal; Coma disc by D. Jewitt |
| C/2003 R1 | C/LINEAR | 2003 Sep 2 | 2003 Sep 6 | 8195 | 2003 Sep 2 | 8195 | Asteroidal; Multiple obs. from NEO Conf. Page |
| P/2003 S1 | P/NEAT | 2003 Sep 23 | 2003 Sep 24 | 8208 | 2003 Sep 24 | 8208 | Asteroidal; Multiple obs. from NEO Conf. Page |
| P/2003 S2 | P/NEAT | 2003 Sep 24 | 2003 Sep 25 | 8209 | 2003 Sep 25 | 8209 | Asteroidal; Multiple obs. from NEO Conf. Page |
| C/2003 S3 | C/LINEAR | 2003 Sep 27 | 2003 Sep 29 | 8211 | 2003 Sep 29 | 8211 | Disc by Bezpalko |
| C/2003 S4 | C/LINEAR | 2003 Sep 27 | 2003 Oct 1 | 8213 | 2003 Oct 1 | 8213 | Asteroidal; Multiple obs. from NEO Conf. Page |
| P/2003 T1 | P/Tritton | 2003 Oct 6 | 2003 Oct 7 | 8215 | 2003 Oct 7 | 8215 | Disc by Juels; Coma disc by multiple obs. from NEO Conf. Page |
| C/2003 T2 | C/LINEAR | 2003 Oct 13 | 2003 Oct 14 | 8222 | 2003 Oct 14 | 8222 | Asteroidal; Multiple obs. from NEO Conf. Page |
| C/2003 T3 | C/Tabur | 2003 Oct 14 | 2003 Oct 15 | 8223 | 2003 Oct 15 | 8223 | Disc by Tabur |
| C/2003 T4 | C/LINEAR | 2003 Oct 13 | 2003 Oct 15 | 8224 | 2003 Oct 15 | 8224 | Asteroidal; Multiple obs. from NEO Conf. Page |
| C/2003 U1 | C/LINEAR | 2003 Oct 19 | 2003 Oct 20 | 8227 | 2003 Oct 20 | 8227 | Disc by Manguso and Stange |
| P/2003 U2 | P/LINEAR | 2003 Oct 19 | 2003 Oct 21 | 8229 | 2003 Oct 21 | 8229 | Disc by Shelly |
| C/2003 U3 | C/NEAT | 2003 Oct 22 | 2003 Oct 23 | 8230 | 2003 Oct 23 | 8230 | Disc by Lawrence |
| C/2003 V1 | C/LINEAR | 2003 Nov 4 | 2003 Nov 6 | 8236 | 2003 Nov 6 | 8236 | Disc by Milner |
| C/2003 W1 | C/LINEAR | 2003 Nov 16 | 2003 Nov 17 | 8239 | 2003 Nov 17 | 8239 | Asteroidal; Multiple obs. from NEO Conf. Page |
| P/2002 LZ11 | P/LINEAR | 2002 Jun 5 | 2003 Nov 18 | 8240 | 2003 Nov 18 | 8240 | Asteroidal; Coma disc by Christensen |
| P/2001 RG100 | P/LINEAR | 2001 Sep 12 | 2003 Nov 28 | 8244 | 2003 Nov 28 | 8244 | Asteroidal; Nuclear condensation disc by Gleason |
| P/2003 UY275 | P/LINEAR | 2003 Oct 29 | 2003 Dec 2 | 8247 | 2003 Dec 2 | 8247 | Asteroidal; Coma disc by Hergenrother |
| P/2003 UD16 | P/LONEOS | 2003 Oct 16 | 2003 Dec 3 | 8248 | 2003 Dec 3 | 8248 | Asteroidal; Coma disc by Hergenrother |
| P/2003 XD10 | P/LINEAR-NEAT | 2003 Dec 4 | 2003 Dec 17 | 8257 | 2003 Dec 17 | 8257 | Asteroidal; Multiple obs from NEO Conf. Page |