| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 Y1 | 1999 12 26.07902 | 03 26 47.28 | +72 24 35.4 | 17.1 | T | 726 |
| C/1999 Y1 | 1999 12 26.08596 | 03 26 45.98 | +72 24 30.8 | 17.2 | T | 726 |
| C/1999 Y1 | 1999 12 26.09291 | 03 26 44.59 | +72 24 25.5 | 17.1 | T | 726 |
| C/1999 Y1 | 1999 12 26.09985 | 03 26 43.30 | +72 24 20.4 | 17.2 | T | 726 |
| C/1999 Y1 | 1999 12 26.64057 | 03 24 56.76 | +72 17 51.6 | 16.9 | T | 897 |
| C/1999 Y1 | 1999 12 26.65447 | 03 24 53.97 | +72 17 41.4 | 897 | ||
| C/1999 Y1 | 1999 12 26.68563 | 03 24 47.91 | +72 17 19.1 | 897 | ||
| C/1999 Y1 | 1999 12 27.10696 | 03 23 26.97 | +72 12 11.9 | 15.8 | T | 681 |
| C/1999 Y1 | 1999 12 27.11695 | 03 23 25.02 | +72 12 04.1 | 16.0 | T | 681 |
| C/1999 Y1 | 1999 12 27.12616 | 03 23 23.21 | +72 11 57.6 | 15.9 | T | 681 |
| C/1999 Y1 | 1999 12 27.44236 | 03 22 22.94 | +72 08 05.2 | 16.4 | T | 360 |
| C/1999 Y1 | 1999 12 27.44479 | 03 22 22.46 | +72 08 03.4 | 360 | ||
| C/1999 Y1 | 1999 12 27.44526 | 03 22 22.37 | +72 08 03.7 | 348 | ||
| C/1999 Y1 | 1999 12 27.44722 | 03 22 21.95 | +72 08 01.8 | 360 | ||
| C/1999 Y1 | 1999 12 27.45990 | 03 22 19.48 | +72 07 52.2 | 348 | ||
| C/1999 Y1 | 1999 12 27.48854 | 03 22 14.19 | +72 07 31.3 | 16.7 | T | 367 |
| C/1999 Y1 | 1999 12 27.49167 | 03 22 13.57 | +72 07 29.1 | 367 | ||
| C/1999 Y1 | 1999 12 27.49479 | 03 22 12.92 | +72 07 26.5 | 367 | ||
| C/1999 Y1 | 1999 12 27.49792 | 03 22 12.31 | +72 07 24.8 | 367 | ||
| C/1999 Y1 | 1999 12 27.49813 | 03 22 12.31 | +72 07 24.0 | 17.4 | T | 351 |
