| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/2009 Y1 | 2010 03 28.23535 | 10 17 16.52 | +71 47 09.8 | 18.9 | T | 704 |
| C/2009 Y1 | 2010 03 28.24561 | 10 17 14.57 | +71 47 12.2 | 18.8 | T | 704 |
| C/2009 Y1 | 2010 03 28.25607 | 10 17 12.85 | +71 47 12.3 | 18.6 | T | 704 |
| C/2009 Y1 | 2010 03 30.54110 | 10 10 30.48 | +71 56 30.2 | 900 | ||
| C/2009 Y1 | 2010 03 30.55170 | 10 10 28.79 | +71 56 32.6 | 18.5 | T | 900 |
| C/2009 Y1 | 2010 03 31.86860 | 10 06 40.26 | +72 00 56.8 | 17.7 | N | J01 |
| C/2009 Y1 | 2010 03 31.88091 | 10 06 38.16 | +72 00 59.1 | 17.6 | N | J01 |
| C/2009 Y1 | 2010 03 31.89323 | 10 06 36.01 | +72 01 01.2 | 17.8 | N | J01 |
| C/2009 Y1 | 2010 04 06.22457 | 09 51 42.81 | +72 12 27.6 | 18.3 | T | H45 |
| C/2009 Y1 | 2010 04 06.22590 | 09 51 42.37 | +72 12 28.0 | 18.3 | T | H45 |
| C/2009 Y1 | 2010 04 06.22725 | 09 51 42.34 | +72 12 28.9 | 18.3 | T | H45 |
| C/2009 Y1 | 2010 04 06.22982 | 09 51 41.98 | +72 12 28.8 | 18.4 | T | H45 |
| C/2009 Y1 | 2010 04 06.23151 | 09 51 41.77 | +72 12 28.8 | 18.4 | T | H45 |
| C/2009 Y1 | 2010 04 06.23455 | 09 51 41.16 | +72 12 28.7 | 18.4 | T | H45 |
| C/2009 Y1 | 2010 04 09.29822 | 09 43 40.14 | +72 14 48.3 | C51 | ||
| C/2009 Y1 | 2010 04 09.29835 | 09 43 39.85 | +72 14 46.8 | C51 | ||
| C/2009 Y1 | 2010 04 09.89365 | 09 42 09.67 | +72 14 54.8 | C51 | ||
| C/2009 Y1 | 2010 04 09.95987 | 09 41 59.41 | +72 14 55.2 | C51 | ||
| C/2009 Y1 | 2010 04 10.02596 | 09 41 49.60 | +72 14 55.2 | C51 | ||
| C/2009 Y1 | 2010 04 10.15826 | 09 41 29.92 | +72 14 56.0 | C51 |