| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/2009 Y1 | 2010 12 09.80613 | 20 03 17.45 | +48 04 14.1 | 14.7 | N | 958 |
| C/2009 Y1 | 2010 12 09.81400 | 20 03 18.83 | +48 03 59.2 | 14.8 | N | 958 |
| C/2009 Y1 | 2010 12 09.81979 | 20 03 19.78 | +48 03 49.4 | 14.5 | N | 235 |
| C/2009 Y1 | 2010 12 09.82266 | 20 03 20.29 | +48 03 44.5 | 15.0 | N | 958 |
| C/2009 Y1 | 2010 12 09.82417 | 20 03 20.56 | +48 03 41.2 | 14.4 | N | 235 |
| C/2009 Y1 | 2010 12 10.45869 | 20 05 10.11 | +47 44 39.7 | 900 | ||
| C/2009 Y1 | 2010 12 10.46600 | 20 05 11.37 | +47 44 26.6 | 15.3 | N | 900 |
| C/2009 Y1 | 2010 12 10.78572 | 20 06 06.21 | +47 34 53.2 | 14.7 | N | 958 |
| C/2009 Y1 | 2010 12 10.80106 | 20 06 08.83 | +47 34 25.4 | 14.7 | N | 958 |
| C/2009 Y1 | 2010 12 10.81759 | 20 06 11.65 | +47 33 55.6 | 14.8 | N | 958 |
| C/2009 Y1 | 2010 12 10.84361 | 20 06 16.12 | +47 33 09.1 | 14.3 | N | J38 |
| C/2009 Y1 | 2010 12 10.84544 | 20 06 16.43 | +47 33 06.1 | 14.3 | N | J38 |
| C/2009 Y1 | 2010 12 10.84635 | 20 06 16.57 | +47 33 04.3 | 14.3 | N | J38 |
| C/2009 Y1 | 2010 12 11.77684 | 20 08 54.49 | +47 05 21.3 | 14.8 | N | 958 |
| C/2009 Y1 | 2010 12 11.80176 | 20 08 58.66 | +47 04 36.8 | 14.7 | N | 232 |
| C/2009 Y1 | 2010 12 11.80529 | 20 08 59.24 | +47 04 30.5 | 14.6 | N | 232 |
| C/2009 Y1 | 2010 12 11.80873 | 20 08 59.81 | +47 04 24.6 | 14.6 | N | 232 |
| C/2009 Y1 | 2010 12 11.83885 | 20 09 04.89 | +47 03 30.3 | 15.0 | N | 958 |
| C/2009 Y1 | 2010 12 11.84998 | 20 09 06.72 | +47 03 10.2 | 14.8 | N | 958 |
| C/2009 Y1 | 2010 12 12.72120 | 20 11 32.65 | +46 37 22.0 | 15.5 | N | C23 |