| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/2009 Y1 | 2011 05 03.80324 | 23 40 24.96 | +15 38 35.0 | 367 | ||
| C/2009 Y1 | 2011 05 03.80527 | 23 40 25.00 | +15 38 35.3 | 14.2 | T | 367 |
| C/2009 Y1 | 2011 05 07.45382 | 23 42 54.61 | +15 15 25.0 | H06 | ||
| C/2009 Y1 | 2011 05 07.45624 | 23 42 54.73 | +15 15 24.0 | H06 | ||
| C/2009 Y1 | 2011 05 07.45865 | 23 42 54.84 | +15 15 23.0 | 13.8 | T | H06 |
| C/2009 Y1 | 2011 05 09.06848 | 23 43 57.91 | +15 04 52.2 | 16.0 | N | A71 |
| C/2009 Y1 | 2011 05 09.07330 | 23 43 58.03 | +15 04 49.3 | 16.1 | N | A71 |
| C/2009 Y1 | 2011 05 12.45333 | 23 46 04.39 | +14 42 06.9 | H06 | ||
| C/2009 Y1 | 2011 05 12.45514 | 23 46 04.46 | +14 42 06.4 | H06 | ||
| C/2009 Y1 | 2011 05 12.45817 | 23 46 04.58 | +14 42 05.3 | 14.6 | T | H06 |
| C/2009 Y1 | 2011 05 13.02685 | 23 46 24.97 | +14 38 09.0 | 15.0 | N | 585 |
| C/2009 Y1 | 2011 05 13.02883 | 23 46 25.01 | +14 38 08.2 | 15.3 | N | 585 |
| C/2009 Y1 | 2011 05 13.03212 | 23 46 25.14 | +14 38 06.5 | 15.3 | N | 585 |
| C/2009 Y1 | 2011 05 13.03619 | 23 46 25.28 | +14 38 04.2 | 15.2 | N | 585 |
| C/2009 Y1 | 2011 05 13.03899 | 23 46 25.40 | +14 38 03.4 | 15.2 | N | 585 |
| C/2009 Y1 | 2011 05 13.04054 | 23 46 25.48 | +14 38 03.2 | 15.1 | N | 585 |
| C/2009 Y1 | 2011 05 16.43692 | 23 48 22.31 | +14 14 03.2 | H06 | ||
| C/2009 Y1 | 2011 05 16.43992 | 23 48 22.45 | +14 14 02.7 | 14.1 | T | H06 |
| C/2009 Y1 | 2011 05 17.11813 | 23 48 44.67 | +14 09 04.4 | 15.2 | N | 958 |
| C/2009 Y1 | 2011 05 17.12963 | 23 48 45.13 | +14 08 59.4 | 15.1 | N | 958 |