| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1989 Y1 | 1990 10 30.83003 | 09 17 17.93 | -21 45 31.1 | 14.0 | T | 372 |
| C/1989 Y1 | 1990 10 30.83715 | 09 17 18.15 | -21 45 40.5 | 372 | ||
| C/1989 Y1 | 1990 12 27.59122 | 08 59 52.49 | -39 08 47.3 | 17.5 | N | 474 |
| C/1989 Y1 | 1990 12 27.61610 | 08 59 50.94 | -39 09 05.1 | 474 | ||
| C/1989 Y1 | 1991 02 07.51058 | 08 09 51.93 | -42 58 22.4 | 17.0 | T | 413 |
| C/1989 Y1 | 1991 02 07.54530 | 08 09 49.70 | -42 58 18.4 | 413 | ||
| C/1989 Y1 | 1991 03 08.52238 | 07 45 49.02 | -40 45 52.4 | 18.4 | N | 474 |
| C/1989 Y1 | 1991 03 08.56023 | 07 45 47.78 | -40 45 36.7 | 474 | ||
| C/1989 Y1 | 1991 03 18.42142 | 07 42 07.48 | -39 36 08.8 | 18.0 | T | 413 |