| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1989 Y1 | 1990 02 20.74977 | 22 54 43.70 | +38 24 58.9 | 046 | ||
| C/1989 Y1 | 1990 02 20.75139 | 22 54 44.05 | +38 24 58.7 | 046 | ||
| C/1989 Y1 | 1990 02 21.74751 | 22 58 45.98 | +38 38 04.0 | 046 | ||
| C/1989 Y1 | 1990 02 21.74907 | 22 58 46.30 | +38 38 07.4 | 046 | ||
| C/1989 Y1 | 1990 02 22.75069 | 23 02 52.13 | +38 51 06.3 | 046 | ||
| C/1989 Y1 | 1990 02 22.75226 | 23 02 52.52 | +38 51 08.0 | 046 | ||
| C/1989 Y1 | 1990 02 23.76887 | 23 07 04.66 | +39 04 03.9 | 046 | ||
| C/1989 Y1 | 1990 02 23.77049 | 23 07 04.91 | +39 04 05.5 | 046 | ||
| C/1989 Y1 | 1990 02 24.75608 | 23 11 12.00 | +39 16 25.5 | 046 | ||
| C/1989 Y1 | 1990 02 24.75764 | 23 11 12.25 | +39 16 27.4 | 046 | ||
| C/1989 Y1 | 1990 02 26.43510 | 23 18 18.46 | +39 36 53.6 | 801 | ||
| C/1989 Y1 | 1990 02 26.43828 | 23 18 19.21 | +39 36 56.3 | 801 | ||
| C/1989 Y1 | 1990 02 26.56528 | 23 18 51.82 | +39 38 26.1 | 657 | ||
| C/1989 Y1 | 1990 03 12.43854 | 00 21 30.93 | +41 50 40.3 | 11.0 | T | 372 |
| C/1989 Y1 | 1990 03 12.44323 | 00 21 32.34 | +41 50 41.7 | 372 | ||
| C/1989 Y1 | 1990 03 12.82770 | 00 23 21.32 | +41 53 10.3 | 503 | ||
| C/1989 Y1 | 1990 03 15.41007 | 00 35 38.91 | +42 08 21.2 | 897 | ||
| C/1989 Y1 | 1990 03 15.41256 | 00 35 39.63 | +42 08 21.1 | 897 | ||
| C/1989 Y1 | 1990 03 15.76979 | 00 37 22.24 | +42 10 07.3 | 046 | ||
| C/1989 Y1 | 1990 03 15.77216 | 00 37 23.09 | +42 10 09.6 | 046 |