| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 Y1 | 1999 12 22.90942 | 03 37 44.44 | +73 00 27.0 | 118 | ||
| C/1999 Y1 | 1999 12 22.91279 | 03 37 43.69 | +73 00 24.8 | 118 | ||
| C/1999 Y1 | 1999 12 22.91667 | 03 37 42.82 | +73 00 22.1 | 17.0 | T | 118 |
| C/1999 Y1 | 1999 12 23.08554 | 03 37 06.89 | +72 58 33.1 | 17.3 | T | 652 |
| C/1999 Y1 | 1999 12 23.08898 | 03 37 06.27 | +72 58 32.0 | 17.5 | T | 652 |
| C/1999 Y1 | 1999 12 23.09013 | 03 37 05.89 | +72 58 30.7 | 17.2 | T | 652 |
| C/1999 Y1 | 1999 12 23.10015 | 03 37 04.34 | +72 58 24.3 | 17.1 | T | 652 |
| C/1999 Y1 | 1999 12 23.10832 | 03 37 02.31 | +72 58 18.9 | 17.4 | T | 652 |
| C/1999 Y1 | 1999 12 23.16926 | 03 36 48.52 | +72 57 39.0 | 16.0 | T | 681 |
| C/1999 Y1 | 1999 12 23.17574 | 03 36 47.17 | +72 57 35.2 | 16.0 | T | 681 |
| C/1999 Y1 | 1999 12 23.18345 | 03 36 45.55 | +72 57 29.8 | 16.1 | T | 681 |
| C/1999 Y1 | 1999 12 23.56068 | 03 35 24.58 | +72 53 23.1 | 900 | ||
| C/1999 Y1 | 1999 12 23.56972 | 03 35 22.68 | +72 53 17.6 | 16.3 | T | 900 |
| C/1999 Y1 | 1999 12 24.02914 | 03 33 45.84 | +72 48 11.8 | 17.3 | T | 726 |
| C/1999 Y1 | 1999 12 24.03609 | 03 33 44.53 | +72 48 07.8 | 17.3 | T | 726 |
| C/1999 Y1 | 1999 12 24.03956 | 03 33 43.86 | +72 48 03.8 | 17.2 | T | 726 |
| C/1999 Y1 | 1999 12 24.04303 | 03 33 42.90 | +72 48 02.8 | 17.3 | T | 726 |
| C/1999 Y1 | 1999 12 24.04649 | 03 33 42.16 | +72 47 59.9 | 17.3 | T | 726 |
| C/1999 Y1 | 1999 12 24.05564 | 03 33 40.55 | +72 47 54.4 | 17.7 | T | 726 |
| C/1999 Y1 | 1999 12 24.06258 | 03 33 38.87 | +72 47 49.6 | 17.3 | T | 726 |