| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1989 Y1 | 1988 06 13.62168 | 19 22 25.57 | -08 31 39.9 | 18.5 | N | 260 |
| C/1989 Y1 | 1988 06 13.68765 | 19 22 23.60 | -08 31 29.8 | 260 | ||
| C/1989 Y1 | 1989 12 20.07257 | 19 58 10.57 | +25 51 05.4 | 688 | ||
| C/1989 Y1 | 1989 12 20.08542 | 19 58 11.94 | +25 51 09.6 | 11.5 | T | 688 |
| C/1989 Y1 | 1989 12 20.39410 | 19 58 46.07 | +25 53 21.5 | 11.0 | T | 892 |
| C/1989 Y1 | 1989 12 21.06597 | 20 00 01.09 | +25 58 06.0 | 11.5 | T | 688 |
| C/1989 Y1 | 1989 12 21.09375 | 20 00 04.12 | +25 58 17.4 | 688 | ||
| C/1989 Y1 | 1989 12 21.37326 | 20 00 35.54 | +26 00 19.7 | 892 | ||
| C/1989 Y1 | 1989 12 21.38368 | 20 00 36.70 | +26 00 24.2 | 892 | ||
| C/1989 Y1 | 1989 12 21.40035 | 20 00 38.43 | +26 00 32.0 | 10.5 | T | 875 |
| C/1989 Y1 | 1989 12 21.42662 | 20 00 41.70 | +26 00 42.0 | 897 | ||
| C/1989 Y1 | 1989 12 22.70764 | 20 03 06.83 | +26 10 02.0 | 046 | ||
| C/1989 Y1 | 1989 12 22.71354 | 20 03 07.51 | +26 10 09.4 | 046 | ||
| C/1989 Y1 | 1989 12 23.37627 | 20 04 23.56 | +26 15 09.3 | 897 | ||
| C/1989 Y1 | 1989 12 23.37882 | 20 04 23.77 | +26 15 12.1 | 11.0 | T | 402 |
| C/1989 Y1 | 1989 12 23.37951 | 20 04 23.94 | +26 15 12.5 | 12.0 | T | 892 |
| C/1989 Y1 | 1989 12 23.39236 | 20 04 25.35 | +26 15 19.1 | 9.5 | T | 404 |
| C/1989 Y1 | 1989 12 23.39404 | 20 04 25.59 | +26 15 17.1 | 897 | ||
| C/1989 Y1 | 1989 12 23.42329 | 20 04 28.96 | +26 15 33.9 | 404 | ||
| C/1989 Y1 | 1989 12 24.08333 | 20 05 45.44 | +26 20 32.7 | 11.0 | T | 688 |