| Comet Designation | Comet Name | Discovery Observation | Discovery Announced | IAUC | Date of Naming | IAUC - MPEC | Notes |
| C/2008 Y2 | C/Gibbs | Dec 1 | Jan 1 | A03 | Jan 1 | A03 | |
| P/2008 Y3 | P/McNaught | Dec 31 | Jan 1 | A04 | Jan 1 | A04 | |
| C/2008 T6 | C/SOHO | Oct 2 | Jan 11 | A59 | Jan 11 | A59 | Disc by Zhou |
| C/2008 T7 | C/SOHO | Oct 3 | Jan 11 | A59 | Jan 11 | A59 | Disc by Kracht |
| C/2008 T8 | C/SOHO | Oct 5 | Jan 11 | A59 | Jan 11 | A59 | Disc by Ruan |
| C/2008 T9 | C/SOHO | Oct 5 | Jan 11 | A59 | Jan 11 | A59 | Disc by Kusiak |
| C/2008 T10 | C/SOHO | Oct 11 | Jan 11 | A59 | Jan 11 | A59 | Disc by Hoffman |
| C/2008 T11 | C/SOHO | Oct 13 | Jan 11 | A59 | Jan 11 | A59 | Disc by Su |
| C/2008 T12 | C/SOHO | Oct 14 | Jan 11 | A59 | Jan 11 | A59 | Disc by Kracht |
| C/2008 W1 | C/STEREO | Nov 18 | Jan 17 | B10 | Jan 17 | B10 | Disc by Watson |
| C/2009 A1 | C/STEREO | Jan 10 | Jan 17 | B10 | Jan 17 | B10 | Disc by Watson |
| C/2009 B1 | C/Boattini | Jan 21 | Jan 22 | B46 | Jan 22 | B46 | |
| C/2008 U2 | C/SOHO | Oct 16 | Jan 28 | B66 | Jan 28 | B66 | Disc by Banach |
| C/2008 U3 | C/SOHO | Oct 16 | Jan 28 | B66 | Jan 28 | B66 | Disc by Matson |
| C/2008 U4 | C/SOHO | Oct 16 | Jan 28 | B66 | Jan 28 | B66 | Disc by Matson |
| C/2008 U5 | C/SOHO | Oct 18 | Jan 28 | B66 | Jan 28 | B66 | Disc by Matson |
| C/2008 U6 | C/SOHO | Oct 18 | Jan 28 | B67 | Jan 28 | B67 | Disc by Kusiak |
| C/2008 U7 | C/SOHO | Oct 20 | Jan 28 | B67 | Jan 28 | B67 | Disc by Kracht |
| C/2008 U8 | C/SOHO | Oct 20 | Jan 28 | B67 | Jan 28 | B67 | Disc by Hoffman |
| C/2008 U9 | C/SOHO | Oct 21 | Jan 28 | B67 | Jan 28 | B67 | Disc by Su |
| C/2008 U10 | C/SOHO | Oct 24 | Jan 29 | B70 | Jan 29 | B70 | Disc by Xu |
| C/2008 U11 | C/SOHO | Oct 24 | Jan 29 | B70 | Jan 29 | B70 | Disc by Su |
| C/2008 U12 | C/SOHO | Oct 26 | Jan 29 | B70 | Jan 29 | B70 | Disc by Zhou |
| C/2008 U13 | C/SOHO | Oct 26 | Jan 29 | B71 | Jan 29 | B71 | Disc by Matson |
| C/2008 U14 | C/SOHO | Oct 27 | Jan 29 | B71 | Jan 29 | B71 | Disc by Kracht |
| C/2008 U15 | C/SOHO | Oct 28 | Jan 29 | B71 | Jan 29 | B71 | Disc by Ruan |
| C/2008 U16 | C/SOHO | Oct 31 | Jan 29 | B71 | Jan 29 | B71 | Disc by Matson |
| P/2008 WZ96 | P/LINEAR | Jan 14 | Jan 29 | B73 | Jan 29 | B73 | Asteroidal; Coma disc by mult obs from NEOCP. |
| C/2009 B2 | C/LINEAR | Jan 29 | Jan 31 | B91 | Jan 31 | B91 | Asteroidal; Coma disc by mult obs from NEOCP. |
| C/2008 V1 | C/SOHO | Nov 2 | Feb 4 | C46 | Feb 4 | C46 | Disc by Matson |
| C/2008 V2 | C/SOHO | Nov 4 | Feb 4 | C46 | Feb 4 | C46 | Disc by Kracht |
| C/2008 V3 | C/SOHO | Nov 6 | Feb 4 | C46 | Feb 4 | C46 | Disc by Matson |
| C/2008 V4 | C/SOHO | Nov 7 | Feb 4 | C46 | Feb 4 | C46 | Disc by Matson |
| C/2008 V5 | C/SOHO | Nov 8 | Feb 4 | C47 | Feb 4 | C47 | Disc by Ruan |
| C/2008 V6 | C/SOHO | Nov 11 | Feb 4 | C47 | Feb 4 | C47 | Disc by Ruan |
| C/2008 W2 | C/SOHO | Nov 16 | Feb 4 | C47 | Feb 4 | C47 | Disc by Ruan |
| C/2008 W3 | C/SOHO | Nov 23 | Feb 4 | C47 | Feb 4 | C47 | Disc by Kubczak |
| C/2008 W4 | C/SOHO | Nov 23 | Feb 5 | C56 | Feb 5 | C56 | Disc by Su |
| C/2008 W5 | C/SOHO | Nov 23 | Feb 5 | C56 | Feb 5 | C56 | Disc by Ruan |
| C/2008 W6 | C/SOHO | Nov 24 | Feb 5 | C56 | Feb 5 | C56 | Disc by Jin |
| C/2008 W7 | C/SOHO | Nov 24 | Feb 5 | C56 | Feb 5 | C56 | Disc by Ruan |
| C/2008 W8 | C/SOHO | Nov 26 | Feb 5 | C57 | Feb 5 | C57 | Disc by Banach |
| C/2008 W9 | C/SOHO | Nov 27 | Feb 5 | C57 | Feb 5 | C57 | Disc by Kracht |
| C/2008 W10 | C/SOHO | Nov 28 | Feb 5 | C57 | Feb 5 | C57 | Disc by Ruan |
| C/2008 W11 | C/SOHO | Nov 29 | Feb 5 | C57 | Feb 5 | C57 | Disc by Banach |
| C/2008 W12 | C/SOHO | Nov 29 | Mar 12 | E60 | Mar 12 | E60 | Disc by Matson |
| C/2008 X7 | C/SOHO | Dec 1 | Mar 12 | E60 | Mar 12 | E60 | Disc by Uchina |
| C/2008 X8 | C/SOHO | Dec 2 | Mar 12 | E60 | Mar 12 | E60 | Disc by Mazzucato |
| C/2008 X9 | C/SOHO | Dec 3 | Mar 12 | E60 | Mar 12 | E60 | Disc by Banach |
| C/2008 X10 | C/SOHO | Dec 3 | Mar 12 | E61 | Mar 12 | E61 | Disc by Kracht |
| C/2008 X11 | C/SOHO | Dec 5 | Mar 12 | E61 | Mar 12 | E61 | Disc by Yuan |
| C/2008 X12 | C/SOHO | Dec 8 | Mar 12 | E61 | Mar 12 | E61 | Disc by Uchina |
| C/2008 X13 | C/SOHO | Dec 10 | Mar 12 | E61 | Mar 12 | E61 | Disc by Kracht |
| C/2008 X14 | C/SOHO | Dec 13 | Mar 13 | E63 | Mar 13 | E63 | Disc by Xu |
| C/2008 Y4 | C/SOHO | Dec 19 | Mar 13 | E63 | Mar 13 | E63 | Disc by Zhou |
| C/2008 Y5 | C/SOHO | Dec 19 | Mar 13 | E63 | Mar 13 | E63 | Disc by Jin |
| C/2008 Y6 | C/SOHO | Dec 21 | Mar 13 | E63 | Mar 13 | E63 | Disc by Uchina |
| C/2008 Y7 | C/SOHO | Dec 21 | Mar 13 | E63 | Mar 13 | E63 | Disc by Uchina |
| C/2008 Y8 | C/SOHO | Dec 21 | Mar 13 | E63 | Mar 13 | E63 | Disc by Kusiak |
| C/2008 Y9 | C/SOHO | Dec 21 | Mar 13 | E63 | Mar 13 | E63 | Disc by Kusiak |
| C/2009 E1 | C/Itagaki | Mar 14 | Mar 15 | E68 | Mar 15 | E68 | |
| C/2008 Y10 | C/SOHO | Dec 21 | Mar 17 | F17 | Mar 17 | F17 | Disc by Ruan |
| C/2008 Y12 | C/SOHO | Dec 22 | Mar 17 | F17 | Mar 17 | F17 | Disc by Kracht |
| C/2008 Y13 | C/SOHO | Dec 27 | Mar 17 | F18 | Mar 17 | F18 | Disc by Kubczak |
| C/2008 Y14 | C/SOHO | Dec 27 | Mar 17 | F18 | Mar 17 | F18 | Disc by Ruan |
| C/2008 Y15 | C/SOHO | Dec 29 | Mar 17 | F18 | Mar 17 | F18 | Disc by Zhou |
| C/2009 A2 | C/SOHO | Dec 31 | Mar 17 | F18 | Mar 17 | F18 | Disc by Su |
| P/2008 CL94 | P/Lemmon | Feb 20 | Mar 18 | F28 | Mar 18 | F28 | |
| C/2009 A3 | C/SOHO | Jan 1 | Mar 18 | F30 | Mar 18 | F30 | Disc by Su |
| C/2009 A4 | C/SOHO | Jan 1 | Mar 18 | F30 | Mar 18 | F30 | Disc by Su |
| C/2009 A5 | C/SOHO | Jan 1 | Mar 18 | F30 | Mar 18 | F30 | Disc by Su |
| C/2008 E10 | C/SOHO | Mar 7 | Mar 18 | F31 | Mar 18 | F31 | Disc by Watson |
| C/2008 Y16 | C/SOHO | Dec 31 | Mar 18 | F31 | Mar 18 | F31 | Disc by Watson |
| C/2008 Y17 | C/SOHO | Dec 31 | Mar 18 | F31 | Mar 18 | F31 | Disc by Battams |
| C/2009 A6 | C/SOHO | Jan 2 | Mar 18 | F31 | Mar 18 | F31 | Disc by Watson |
| C/2009 F1 | C/Larson | Mar 16 | Mar 18 | 9029 | Mar 18 | 9029 | |
| C/2009 F2 | C/McNaught | Mar 19 | Mar 20 | 9030 | Mar 20 | 9030 | |
| P/2009 F3 | P/LINEAR | Mar 17 | Mar 20 | 9031 | Mar 20 | 9031 | Recovery of P/2001 MD7 |
| C/2009 F4 | C/McNaught | Mar 20 | Mar 21 | 9032 | Mar 21 | 9032 | |
| C/2009 F5 | C/McNaught | Mar 20 | Mar 22 | 9033 | Mar 22 | 9033 | |
| C/2009 G1 | C/STEREO | Apr 3 | Apr 9 | 9036 | Apr 9 | 9036 | Disc by ? |
| C/2009 F6 | C/Yi-Swan | Mar 25 | Apr 9 | G31 | Apr 9 | G31 | |
| C/2009 K1 | C/Gibbs | Apr 24 | May 18 | 9044 | May 18 | 9044 | |
| C/2009 K2 | C/Catalina | May 18 | May 19 | 9045 | May 18 | 9045 | Asteroidal; Coma disc by mult obs from NEOCP |
| C/2009 K3 | C/Beshore | May 26 | May 28 | 9047 | May 28 | 9047 | |
| C/2009 K4 | C/Gibbs | May 27 | May 28 | 9048 | May 28 | 9048 | |
| C/2009 K5 | C/McNaught | May 27 | May 29 | 9050 | May 29 | 9050 | |
| P/2009 L2 | P/Yang-Gao | Jun 15 | Jun 16 | 9052 | Jun 16 | 9052 | |
| C/2009 B6 | C/STEREO | Jan 19 | Jun 25 | M37 | Jun 25 | M37 | Disc by Matson |
| C/2009 B7 | C/STEREO | Jan 29 | Jun 25 | M37 | Jun 25 | M37 | Disc by Matson |
| C/2009 C1 | C/STEREO | Feb 10 | Jun 25 | M37 | Jun 25 | M37 | Disc by Kracht |
| C/2009 C2 | C/STEREO | Feb 11 | Jun 25 | M37 | Jun 25 | M37 | Disc by Battams |
| C/2008 Y18 | C/SOHO | Dec 25 | Jun 27 | M41 | Jun 27 | M41 | Disc by Kusiak |
| C/2009 A7 | C/SOHO | Jan 4 | Jun 27 | M41 | Jun 27 | M41 | Disc by Kubczak |
| C/2009 B8 | C/SOHO | Jan 20 | Jun 27 | M41 | Jun 27 | M41 | Disc by Zhou |
| C/2009 B9 | C/SOHO | Jan 4 | Jun 27 | M41 | Jun 27 | M41 | Disc by Xu |
| C/2009 B10 | C/SOHO | Jan 29 | Jun 27 | M42 | Jun 27 | M42 | Disc by Xu |
| C/2009 B11 | C/SOHO | Jan 30 | Jun 27 | M42 | Jun 27 | M42 | Disc by Hoffman |
| C/2009 C3 | C/SOHO | Feb 4 | Jun 27 | M42 | Jun 27 | M42 | Disc by Matson |
| C/2009 C4 | C/SOHO | Feb 7 | Jun 30 | M54 | Jun 30 | M54 | Disc by Zhou |
| C/2009 C5 | C/SOHO | Feb 11 | Jun 30 | M54 | Jun 30 | M54 | Disc by Kaluzny |
| C/2009 D2 | C/SOHO | Feb 19 | Jun 30 | M54 | Jun 30 | M54 | Disc by Ruan |
| C/2009 D3 | C/SOHO | Feb 19 | Jun 30 | M54 | Jun 30 | M54 | Disc by Zhou |
| C/2009 D4 | C/SOHO | Feb 21 | Jun 30 | M55 | Jun 30 | M55 | Disc by Hoffman |
| C/2009 D5 | C/SOHO | Feb 23 | Jun 30 | M55 | Jun 30 | M55 | Disc by Kusiak |
| C/2009 D6 | C/SOHO | Feb 24 | Jun 30 | M55 | Jun 30 | M55 | Disc by Kracht |
| C/2009 D7 | C/SOHO | Feb 26 | Jul 1 | N01 | Jul 1 | N01 | Disc by Uchina |
| C/2009 D8 | C/SOHO | Feb 26 | Jul 1 | N01 | Jul 1 | N01 | Disc by Zhou |
| C/2009 E2 | C/SOHO | Mar 1 | Jul 1 | N01 | Jul 1 | N01 | Disc by M. Kusiak |
| C/2009 E3 | C/SOHO | Mar 7 | Jul 1 | N01 | Jul 1 | N01 | Disc by E. Banach |
| C/2009 E4 | C/SOHO | Mar 10 | Jul 1 | N01 | Jul 1 | N01 | Disc by W. Xu |
| C/2009 E5 | C/SOHO | Mar 10 | Jul 9 | N29 | Jul 9 | N29 | Disc by B. Zhou |
| C/2009 F8 | C/SOHO | Mar 16 | Jul 9 | N29 | Jul 9 | N29 | Disc by M. Uchina |
| C/2009 F9 | C/SOHO | Mar 28 | Jul 9 | N29 | Jul 9 | N29 | Disc by H. Su |
| C/2009 F10 | C/SOHO | Mar 30 | Jul 9 | N29 | Jul 9 | N29 | Disc by M. Uchina |
| C/2009 G2 | C/SOHO | Apr 2 | Jul 9 | N30 | Jul 9 | N30 | Disc by H. Su |
| C/2009 G3 | C/SOHO | Apr 2 | Jul 9 | N30 | Jul 9 | N30 | Disc by B. Zhou |
| C/2009 G4 | C/SOHO | Apr 4 | Jul 9 | N30 | Jul 9 | N30 | Disc by A. Kubczak |
| C/2009 G5 | C/SOHO | Apr 6 | Jul 9 | N30 | Jul 9 | N30 | Disc by H. Su |
| C/2009 G6 | C/SOHO | Apr 10 | Jul 9 | N30 | Jul 9 | N30 | Disc by B. Zhou |
| C/2009 G7 | C/SOHO | Apr 13 | Jul 10 | N33 | Jul 10 | N33 | Disc by A. Kubczak |
| C/2009 G8 | C/SOHO | Apr 13 | Jul 10 | N33 | Jul 10 | N33 | Disc by B. Zhou |
| P/2009 H1 | P/LINEAR | Apr 17 | Apr 18 | 9039 | Apr 18 | 9039 | Recovery of P/2002 LZ11 |
| C/2009 H3 | C/SOHO | Apr 18 | Jul 10 | N33 | Jul 10 | N33 | Disc by M. Kusiak |
| C/2009 H4 | C/SOHO | Apr 19 | Jul 10 | N33 | Jul 10 | N33 | Disc by M. Kusiak |
| C/2009 H5 | C/SOHO | Apr 22 | Jul 10 | N34 | Jul 10 | N34 | Disc by B. Zhou |
| C/2009 H6 | C/SOHO | Apr 23 | Jul 10 | N34 | Jul 10 | N34 | Disc by B. Zhou |
| C/2009 H7 | C/SOHO | Apr 24 | Jul 10 | N34 | Jul 10 | N34 | Disc by R. Kracht |
| C/2009 H8 | C/SOHO | Apr 24 | Jul 10 | N34 | Jul 10 | N34 | Disc by R. Matson |
| C/2009 J1 | C/SOHO | May 3 | Jul 14 | N46 | Jul 14 | N46 | Disc by M. Uchina |
| C/2009 J2 | C/SOHO | May 3 | Jul 14 | N46 | Jul 14 | N46 | Disc by M. Kusiak |
| C/2009 J3 | C/SOHO | May 3 | Jul 14 | N46 | Jul 14 | N46 | Disc by T. Hoffman |
| C/2009 J4 | C/SOHO | May 5 | Jul 14 | N46 | Jul 14 | N46 | Disc by M. Uchina |
| C/2009 J5 | C/SOHO | May 6 | Jul 14 | N46 | Jul 14 | N46 | Disc by B. Zhou |
| C/2009 J6 | C/SOHO | May 6 | Jul 14 | N47 | Jul 14 | N47 | Disc by R. Kracht |
| C/2009 J7 | C/SOHO | May 6 | Jul 14 | N47 | Jul 14 | N47 | Disc by M. Kaluzny |
| C/2009 J8 | C/SOHO | May 8 | Jul 14 | N47 | Jul 14 | N47 | Disc by M. Kusiak |
| C/2009 J9 | C/SOHO | May 9 | Jul 14 | N47 | Jul 14 | N47 | Disc by M. Kusiak |
| C/2009 J10 | C/SOHO | May 11 | Jul 15 | N49 | Jul 15 | N49 | Disc by R. Kracht |
| C/2009 J11 | C/SOHO | May 13 | Jul 15 | N49 | Jul 15 | N49 | Disc by B. Zhou |
| C/2009 J12 | C/SOHO | May 15 | Jul 15 | N49 | Jul 15 | N49 | Disc by R. Kracht |
| C/2009 K6 | C/SOHO | May 17 | Jul 15 | N49 | Jul 15 | N49 | Disc by B. Zhou |
| C/2009 K7 | C/SOHO | May 20 | Jul 15 | N50 | Jul 15 | N50 | Disc by B. Zhou |
| C/2009 K8 | C/SOHO | May 24 | Jul 15 | N50 | Jul 15 | N50 | Disc by M. Kusiak |
| C/2009 K9 | C/SOHO | May 26 | Jul 15 | N50 | Jul 15 | N50 | Disc by M. Uchina |
| C/2009 K10 | C/SOHO | May 27 | Jul 15 | N50 | Jul 15 | N50 | Disc by M. Uchina |
| C/2009 K11 | C/SOHO | May 29 | Jul 21 | O18 | Jul 21 | O18 | Disc by M. Uchina |
| C/2009 K12 | C/SOHO | May 30 | Jul 21 | O18 | Jul 21 | O18 | Disc by M. Kusiak |
| C/2009 K13 | C/SOHO | May 31 | Jul 21 | O18 | Jul 21 | O18 | Disc by B. Zhou |
| C/2009 K14 | C/SOHO | May 31 | Jul 21 | O18 | Jul 21 | O18 | Disc by B. Zhou |
| C/2009 L2 | C/SOHO | Jun 3 | Jul 21 | O19 | Jul 21 | O19 | Disc by ? |
| C/2009 L3 | C/SOHO | Jun 3 | Jul 21 | O19 | Jul 21 | O19 | Disc by Kracht |
| C/2009 L4 | C/SOHO | Jun 4 | Jul 21 | O19 | Jul 21 | O19 | Disc by Zhou |
| C/2009 L5 | C/SOHO | Jun 5 | Jul 21 | O19 | Jul 21 | O19 | Disc by Kracht |
| C/2009 L7 | C/SOHO | Jun 1 | Jul 21 | O21 | Jul 21 | O21 | Disc by Zhou |
| C/2009 L8 | C/SOHO | Jun 6 | Jul 21 | O21 | Jul 21 | O21 | Disc by Zhou |
| C/2009 L9 | C/SOHO | Jun 7 | Jul 21 | O21 | Jul 21 | O21 | Disc by Hoffman |
| C/2009 L10 | C/SOHO | Jun 7 | Jul 21 | O21 | Jul 21 | O21 | Disc by Sun |
| C/2009 L11 | C/SOHO | Jun 7 | Jul 21 | O21 | Jul 21 | O21 | Disc by Zhou |
| C/2009 L12 | C/SOHO | Jun 8 | Jul 21 | O22 | Jul 21 | O22 | Disc by Kusiak |
| C/2009 L13 | C/SOHO | Jun 9 | Jul 21 | O22 | Jul 21 | O22 | Disc by Uchina |
| C/2009 L14 | C/SOHO | Jun 10 | Jul 21 | O22 | Jul 21 | O22 | Disc by B. Zhou |
| C/2009 L15 | C/SOHO | Jun 10 | Jul 21 | O22 | Jul 21 | O22 | Disc by Zhou |
| C/2009 A8 | C/STEREO | Jan 4 | Jul 22 | O25 | Jul 22 | O25 | Disc by Watson |
| C/2009 A9 | C/STEREO | Jan 10 | Jul 22 | O25 | Jul 22 | O25 | Disc by Matson |
| C/2009 A10 | C/STEREO | Jan 10 | Jul 22 | O25 | Jul 22 | O25 | Disc by Watson |
| C/2009 O1 | C/STEREO | Jul 18 | Jul 22 | O25 | Jul 22 | O25 | Disc by Kusiak |
| C/2009 O2 | C/Catalina | Jul 27 | Jul 30 | 9057 | Jul 30 | 9057 | |
| C/2009 O3 | C/Hill | Jul 29 | Jul 30 | 9058 | Jul 30 | 9058 | |
| C/2009 O4 | C/Hill | Jul 30 | Jul 31 | 9059 | Jul 31 | 9059 | |
| C/2009 O5 | C/SOHO | Jul 29 | Nov 16 | W09 | Nov 16 | W09 | Disc. by B. Zhou |
| C/2009 L16 | C/SOHO | Jun 14 | Aug 1 | P01 | Aug 1 | P01 | Disc by Matson |
| C/2009 L17 | C/SOHO | Jun 15 | Aug 1 | P01 | Aug 1 | P01 | Disc by Kusiak |
| C/2009 M1 | C/SOHO | Jun 21 | Aug 1 | P01 | Aug 1 | P01 | Disc by Zhou |
| C/2009 M2 | C/SOHO | Jun 22 | Aug 1 | P01 | Aug 1 | P01 | Disc by Kusiak |
| C/2009 M3 | C/SOHO | Jun 22 | Aug 1 | P02 | Aug 1 | P02 | Disc by B. Zhou |
| C/2009 M4 | C/SOHO | Jun 24 | Aug 1 | P02 | Aug 1 | P02 | Disc by R. Kracht |
| C/2009 M5 | C/SOHO | Jun 25 | Aug 1 | P02 | Aug 1 | P02 | Disc by B. Zhou |
| C/2009 M6 | C/SOHO | Jun 25 | Aug 1 | P02 | Aug 1 | P02 | Disc by ? |
| C/2009 M7 | C/SOHO | Jun 26 | Aug 4 | P20 | Aug 4 | P20 | Disc by ? |
| C/2009 M8 | C/SOHO | Jun 30 | Aug 4 | P20 | Aug 4 | P20 | Disc by ? |
| C/2009 N1 | C/SOHO | Jul 2 | Aug 4 | P20 | Aug 4 | P20 | Disc by ? |
| C/2009 N2 | C/SOHO | Jul 4 | Aug 4 | P20 | Aug 4 | P20 | Disc by M. Kusiak |
| C/2009 N3 | C/SOHO | Jul 4 | Aug 4 | P20 | Aug 4 | P20 | Disc by B. Zhou |
| C/2009 P1 | C/Garradd | Aug 13 | Aug 15 | P54 | Aug 15 | P54 | |
| C/2009 P2 | C/Boattini | Aug 15 | Aug 18 | 9063 | Aug 18 | 9063 | |
| C/2009 P3 | C/SOHO | Aug 1 | Nov 16 | W09 | Nov 16 | W09 | Disc. by M. Kusiak |
| C/2009 P4 | C/SOHO | Aug 9 | Nov 16 | W09 | Nov 16 | W09 | Disc. by B. Zhou |
| C/2009 P5 | C/SOHO | Aug 11 | Nov 16 | W09 | Nov 16 | W09 | Disc. by B. Zhou |
| P/2009 Q1 | P/Hill | Aug 27 | Aug 29 | 9067 | Aug 29 | 9067 | |
| P/2009 Q4 | P/Boattini | Aug 26 | Aug 31 | 9069 | Aug 31 | 9069 | |
| P/2009 Q5 | P/McNaught | Aug 31 | Sep 1 | 9070 | Sep 1 | 9070 | |
| C/2009 Q6 | C/SOHO | Aug 20 | Nov 16 | W10 | Nov 16 | W10 | Disc by Z. Xu |
| C/2009 Q7 | C/SOHO | Aug 22 | Nov 16 | W10 | Nov 16 | W10 | Disc by Z. Xu |
| C/2009 Q8 | C/SOHO | Aug 31 | Nov 16 | W10 | Nov 31 | W10 | Disc by ? |
| C/2009 R1 | C/McNaught | Jul 20 | Sep 10 | 9071 | Sep 10 | 9071 | |
| P/2009 R2 | P/Pigott-LINEAR-Kowalski | Sep 10 | Sep 11 | 9072 | Sep 11 | 9072 | Recovery of P/2003 A1 = 1783 W1 |
| P/2009 S1 | P/Gibbs | Sep 20 | Sep 22 | 9074 | Sep 22 | 9074 | Recovery of P/2001 Q10 |
| P/2009 S2 | P/McNaught | Sep 20 | Sep 24 | 9075 | Sep 24 | 9075 | |
| C/2009 S3 | C/Lemmon | Sep 24 | Sep 27 | 9076 | Sep 27 | 9076 | Asteroidal; Coma seen by W.H. Ryan, E.V. Ryan |
| P/2009 S4 | P/Catalina-LINEAR | Sep 21 | Sep 28 | 9077 | Sep 28 | 9077 | Recovery of comet P/2004 EW38 |
| C/2009 T1 | C/McNaught | Oct 9 | Oct 11 | 9080 | Oct 11 | 9080 | |
| P/2009 QG31 | C/La Sagra | Aug 19 | Sep 29 | 9078 | Oct 9 | 9079 | Asteroidal; Coma seen by Tubbiolo and McMillan on Sep 12 |
| P/2009 T2 | P/La Sagra | Oct 12 | Oct 13 | 9081 | Oct 13 | 9081 | Disc by R. Stoss, Visnjan, and Croatia |
| C/2009 T3 | C/LINEAR | Oct 14 | Oct 15 | 9083 | Oct 15 | 9083 | Asteroidal; Coma seen by L. Buzzi on Oct 15 |
| P/2009 SK280 | P/Spacewatch-Hill | Oct 15 | Oct 16 | U02 | Oct 16 | U02 | |
| C/2009 U1 | C/Garradd | Oct 17 | Oct 18 | U27 | Oct 18 | U27 | |
| P/2009 U2 | P/LINEAR | Oct 18 | Oct 19 | U40 | Oct 19 | U40 | Recovery of P/2001 YX127 |
| C/2009 U3 | C/Hill | Oct 21 | Oct 22 | 9086 | Oct 22 | 9086 | |
| C/2009 U4 | C/McNaught | Oct 23 | Oct 24 | 9087 | Oct 24 | 9087 | |
| C/2009 U5 | C/Grauer | Oct 23 | Oct 25 | 9089 | Oct 25 | 9089 | |
| P/2009 U6 | P/LINEAR | Oct 27 | Oct 29 | 9090 | Oct 29 | 9090 | Asteroidal; Coma seen on Oct 28 by T. Kryachka, B. Satovski |
| P/2009 W1 | P/Hill | Nov 18 | Nov 19 | 9095 | Nov 19 | 9095 | |
| C/2009 W2 | C/Boattini | Nov 23 | Nov 24 | 9096 | Nov 24 | 9096 | |
| P/2009 X1 | P/LINEAR-NEAT | Dec 11 | Dec 17 | Y17 | Dec 17 | Y17 | Recovery of P/2003 CP7 |
| C/2009 Y1 | C/Catalina | Dec 17 | Dec 20 | Y33 | Dec 20 | Y33 | Disc. by Hill |
| P/2009 Y2 | P/Kowalski | Dec 20 | Dec 21 | Y40 | Dec 21 | Y40 |