| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/2009 Y1 | 2010 12 20.68990 | 20 32 23.02 | +42 49 21.2 | 15.0 | N | 118 |
| C/2009 Y1 | 2010 12 20.69175 | 20 32 23.28 | +42 49 18.0 | 14.9 | N | 118 |
| C/2009 Y1 | 2010 12 20.69360 | 20 32 23.58 | +42 49 15.1 | 14.7 | N | 118 |
| C/2009 Y1 | 2010 12 20.69546 | 20 32 23.82 | +42 49 11.5 | 15.0 | N | 118 |
| C/2009 Y1 | 2010 12 20.78043 | 20 32 36.34 | +42 46 51.4 | 15.0 | N | 958 |
| C/2009 Y1 | 2010 12 20.78904 | 20 32 37.65 | +42 46 37.4 | 14.9 | N | 958 |
| C/2009 Y1 | 2010 12 20.79853 | 20 32 38.97 | +42 46 20.7 | 14.6 | N | 958 |
| C/2009 Y1 | 2010 12 20.80765 | 20 32 40.38 | +42 46 06.3 | 14.9 | N | 958 |
| C/2009 Y1 | 2010 12 20.81799 | 20 32 41.90 | +42 45 49.0 | 14.9 | N | 958 |
| C/2009 Y1 | 2010 12 20.82795 | 20 32 43.39 | +42 45 32.6 | 14.9 | N | 958 |
| C/2009 Y1 | 2010 12 23.40838 | 20 38 59.15 | +41 35 19.8 | 14.1 | T | D95 |
| C/2009 Y1 | 2010 12 23.41052 | 20 38 59.47 | +41 35 16.2 | D95 | ||
| C/2009 Y1 | 2010 12 23.41266 | 20 38 59.80 | +41 35 12.8 | D95 | ||
| C/2009 Y1 | 2010 12 23.41693 | 20 39 00.36 | +41 35 05.8 | D95 | ||
| C/2009 Y1 | 2010 12 23.50236 | 20 39 12.64 | +41 32 47.1 | 14.1 | T | 349 |
| C/2009 Y1 | 2010 12 23.50604 | 20 39 13.15 | +41 32 41.3 | 349 | ||
| C/2009 Y1 | 2010 12 25.44899 | 20 43 47.64 | +40 41 09.5 | 900 | ||
| C/2009 Y1 | 2010 12 25.45612 | 20 43 48.63 | +40 40 58.1 | 12.0 | T | 900 |
| C/2009 Y1 | 2010 12 25.76432 | 20 44 31.59 | +40 32 54.0 | 14.8 | N | 958 |
| C/2009 Y1 | 2010 12 25.77381 | 20 44 32.93 | +40 32 39.1 | 14.8 | N | 958 |