| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1991 Y1 | 1992 02 01.38090 | 23 47 22.67 | -15 30 19.3 | 411 | ||
| C/1991 Y1 | 1992 02 01.38139 | 23 47 22.84 | -15 30 21.6 | 411 | ||
| C/1991 Y1 | 1992 02 01.38322 | 23 47 23.44 | -15 30 31.3 | 411 | ||
| C/1991 Y1 | 1992 02 01.38382 | 23 47 23.60 | -15 30 35.4 | 411 | ||
| C/1991 Y1 | 1992 02 01.38450 | 23 47 23.82 | -15 30 38.8 | 411 | ||
| C/1991 Y1 | 1992 03 03.41683 | 02 01 41.59 | -53 58 53.0 | 14.1 | N | 474 |
| C/1991 Y1 | 1992 03 03.42001 | 02 01 42.51 | -53 59 02.4 | 474 | ||
| C/1991 Y1 | 1992 03 03.42400 | 02 01 43.52 | -53 59 13.7 | 474 | ||
| C/1991 Y1 | 1992 03 08.43582 | 02 25 30.17 | -57 43 42.2 | 474 | ||
| C/1991 Y1 | 1992 03 08.44126 | 02 25 31.64 | -57 43 54.0 | 474 | ||
| C/1991 Y1 | 1992 03 27.35535 | 04 29 30.08 | -66 58 15.3 | 16.2 | N | 474 |
| C/1991 Y1 | 1992 03 27.36547 | 04 29 34.98 | -66 58 24.8 | 474 | ||
| C/1991 Y1 | 1992 03 31.40559 | 05 04 17.21 | -67 51 09.1 | 474 | ||
| C/1991 Y1 | 1992 03 31.41201 | 05 04 20.74 | -67 51 10.9 | 474 | ||
| C/1991 Y1 | 1992 04 30.41111 | 09 02 04.03 | -61 46 09.0 | 17.6 | N | 474 |
| C/1991 Y1 | 1992 04 30.42413 | 09 02 08.35 | -61 45 46.6 | 474 | ||
| C/1991 Y1 | 1992 05 02.35238 | 09 12 27.70 | -60 54 12.6 | 17.8 | N | 474 |
| C/1991 Y1 | 1992 05 02.37050 | 09 12 33.33 | -60 53 42.5 | 474 |