| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1991 Y1 | 1991 12 24.36146 | 20 46 44.04 | +18 53 06.9 | 10.0 | T | 897 |
| C/1991 Y1 | 1991 12 24.36510 | 20 46 44.71 | +18 52 58.7 | 897 | ||
| C/1991 Y1 | 1991 12 24.37222 | 20 46 46.24 | +18 52 55.6 | 897 | ||
| C/1991 Y1 | 1991 12 24.37650 | 20 46 47.18 | +18 52 42.2 | 897 | ||
| C/1991 Y1 | 1991 12 26.37853 | 20 53 52.22 | +18 06 43.6 | 411 | ||
| C/1991 Y1 | 1991 12 26.39097 | 20 53 54.62 | +18 06 28.5 | 897 | ||
| C/1991 Y1 | 1991 12 26.39256 | 20 53 55.03 | +18 06 24.7 | 411 | ||
| C/1991 Y1 | 1991 12 26.39486 | 20 53 55.38 | +18 06 20.8 | 411 | ||
| C/1991 Y1 | 1991 12 26.39544 | 20 53 55.85 | +18 06 20.1 | 411 | ||
| C/1991 Y1 | 1991 12 26.39578 | 20 53 55.84 | +18 06 18.4 | 897 | ||
| C/1991 Y1 | 1991 12 26.40770 | 20 53 58.37 | +18 06 01.0 | 411 | ||
| C/1991 Y1 | 1991 12 26.40868 | 20 53 58.46 | +18 06 05.3 | 897 | ||
| C/1991 Y1 | 1991 12 26.40895 | 20 53 58.56 | +18 06 01.2 | 411 | ||
| C/1991 Y1 | 1991 12 26.41078 | 20 53 58.97 | +18 05 59.4 | 411 | ||
| C/1991 Y1 | 1991 12 27.80694 | 20 59 05.81 | +17 31 58.4 | 589 | ||
| C/1991 Y1 | 1991 12 27.82153 | 20 59 08.97 | +17 31 35.3 | 589 | ||
| C/1991 Y1 | 1991 12 28.37589 | 21 01 13.02 | +17 17 35.7 | 411 | ||
| C/1991 Y1 | 1991 12 28.38197 | 21 01 14.37 | +17 17 24.7 | 411 | ||
| C/1991 Y1 | 1991 12 28.38274 | 21 01 14.55 | +17 17 25.1 | 411 | ||
| C/1991 Y1 | 1991 12 28.38417 | 21 01 14.77 | +17 17 22.8 | 411 |
