| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 Y1 | 1999 12 21.74228 | 03 42 01.45 | +73 12 41.5 | 046 | ||
| C/1999 Y1 | 1999 12 21.74421 | 03 42 01.08 | +73 12 40.2 | 046 | ||
| C/1999 Y1 | 1999 12 21.89279 | 03 41 27.79 | +73 11 10.1 | 17.3 | T | 595 |
| C/1999 Y1 | 1999 12 21.89556 | 03 41 27.17 | +73 11 08.5 | 595 | ||
| C/1999 Y1 | 1999 12 21.89836 | 03 41 26.54 | +73 11 06.0 | 595 | ||
| C/1999 Y1 | 1999 12 21.90110 | 03 41 25.88 | +73 11 04.0 | 595 | ||
| C/1999 Y1 | 1999 12 21.90669 | 03 41 24.46 | +73 11 01.8 | 595 | ||
| C/1999 Y1 | 1999 12 21.92890 | 03 41 19.69 | +73 10 46.5 | 16.0 | T | 118 |
| C/1999 Y1 | 1999 12 21.93315 | 03 41 18.65 | +73 10 43.9 | 118 | ||
| C/1999 Y1 | 1999 12 21.93670 | 03 41 17.98 | +73 10 42.2 | 118 | ||
| C/1999 Y1 | 1999 12 22.07917 | 03 40 46.25 | +73 09 12.7 | 611 | ||
| C/1999 Y1 | 1999 12 22.08472 | 03 40 44.91 | +73 09 08.6 | 611 | ||
| C/1999 Y1 | 1999 12 22.08854 | 03 40 44.26 | +73 09 06.6 | 611 | ||
| C/1999 Y1 | 1999 12 22.61043 | 03 38 49.35 | +73 03 38.8 | 16.7 | T | 900 |
| C/1999 Y1 | 1999 12 22.62322 | 03 38 46.59 | +73 03 30.8 | 900 | ||
| C/1999 Y1 | 1999 12 22.77468 | 03 38 13.93 | +73 01 53.0 | 16.3 | T | 046 |
| C/1999 Y1 | 1999 12 22.77704 | 03 38 13.49 | +73 01 51.9 | 046 | ||
| C/1999 Y1 | 1999 12 22.77970 | 03 38 12.91 | +73 01 50.0 | 046 | ||
| C/1999 Y1 | 1999 12 22.78196 | 03 38 12.39 | +73 01 48.7 | 046 | ||
| C/1999 Y1 | 1999 12 22.78486 | 03 38 11.73 | +73 01 47.3 | 046 |