| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1989 Y1 | 1989 12 31.72420 | 20 21 21.60 | +27 25 59.9 | 046 | ||
| C/1989 Y1 | 1990 01 01.72187 | 20 23 30.72 | +27 35 25.2 | 046 | ||
| C/1989 Y1 | 1990 01 01.72487 | 20 23 31.21 | +27 35 27.5 | 046 | ||
| C/1989 Y1 | 1990 01 07.40868 | 20 36 19.31 | +28 32 59.3 | 10.0 | T | 364 |
| C/1989 Y1 | 1990 01 07.41250 | 20 36 19.55 | +28 33 04.8 | 364 | ||
| C/1989 Y1 | 1990 01 08.37326 | 20 38 34.80 | +28 43 25.0 | 11.0 | T | 897 |
| C/1989 Y1 | 1990 01 08.38588 | 20 38 36.59 | +28 43 30.6 | 897 | ||
| C/1989 Y1 | 1990 01 13.58628 | 20 51 18.64 | +29 42 34.1 | 11.3 | T | 210 |
| C/1989 Y1 | 1990 01 14.71966 | 20 54 11.58 | +29 56 02.9 | 046 | ||
| C/1989 Y1 | 1990 01 14.72262 | 20 54 12.05 | +29 56 04.3 | 046 | ||
| C/1989 Y1 | 1990 01 21.40903 | 21 12 03.44 | +31 20 05.9 | 9.0 | T | 364 |
| C/1989 Y1 | 1990 01 21.41528 | 21 12 04.45 | +31 20 11.4 | 364 | ||
| C/1989 Y1 | 1990 01 22.72884 | 21 15 46.42 | +31 37 28.8 | 046 | ||
| C/1989 Y1 | 1990 01 22.73162 | 21 15 46.94 | +31 37 31.0 | 046 | ||
| C/1989 Y1 | 1990 01 27.41111 | 21 29 26.56 | +32 40 59.4 | 8.5 | T | 364 |
| C/1989 Y1 | 1990 01 29.74792 | 21 36 34.51 | +33 13 33.0 | 046 | ||
| C/1989 Y1 | 1990 01 29.75000 | 21 36 34.88 | +33 13 35.8 | 046 | ||
| C/1989 Y1 | 1990 02 12.40605 | 22 22 39.38 | +36 29 26.3 | 897 | ||
| C/1989 Y1 | 1990 02 17.75596 | 22 42 52.31 | +37 44 32.4 | 046 | ||
| C/1989 Y1 | 1990 02 17.75799 | 22 42 52.75 | +37 44 34.3 | 046 |