| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 06 09.87363 | 12 24 34.38 | +50 11 40.4 | 046 | ||
| C/1998 H1 | 1998 06 09.87465 | 12 24 34.30 | +50 11 40.5 | 046 | ||
| C/1998 H1 | 1998 06 15.53064 | 12 18 45.29 | +50 31 50.0 | 355 | ||
| C/1998 H1 | 1998 06 15.54410 | 12 18 44.57 | +50 31 52.6 | 355 | ||
| C/1998 H1 | 1998 06 15.54977 | 12 18 44.28 | +50 31 53.2 | 355 | ||
| C/1998 H1 | 1998 06 17.53611 | 12 17 14.54 | +50 36 32.3 | 15.6 | T | 360 |
| C/1998 H1 | 1998 06 17.53889 | 12 17 14.41 | +50 36 32.6 | 360 | ||
| C/1998 H1 | 1998 06 19.90787 | 12 15 47.50 | +50 40 47.5 | 14.9 | T | 504 |
| C/1998 H1 | 1998 06 19.91059 | 12 15 47.38 | +50 40 47.5 | 504 | ||
| C/1998 H1 | 1998 06 20.93751 | 12 15 16.05 | +50 42 13.7 | 15.6 | T | 605 |
| C/1998 H1 | 1998 06 20.95446 | 12 15 16.67 | +50 42 11.1 | 15.6 | T | 605 |
| C/1998 H1 | 1998 06 29.51168 | 12 13 02.90 | +50 48 19.3 | 897 | ||
| C/1998 H1 | 1998 06 29.51898 | 12 13 02.50 | +50 48 17.0 | 16.9 | T | 897 |
| C/1998 H1 | 1998 07 20.87049 | 12 19 38.61 | +50 44 27.4 | 16.7 | T | 561 |
| C/1998 H1 | 1998 07 20.87674 | 12 19 38.94 | +50 44 27.0 | 16.7 | T | 561 |
| C/1998 H1 | 1998 07 20.88299 | 12 19 39.07 | +50 44 25.8 | 16.7 | T | 561 |
| C/1998 H1 | 1998 07 20.88536 | 12 19 39.34 | +50 44 26.2 | 118 | ||
| C/1998 H1 | 1998 07 20.88880 | 12 19 39.40 | +50 44 26.6 | 16.1 | T | 118 |
| C/1998 H1 | 1998 07 20.89097 | 12 19 39.53 | +50 44 27.0 | 16.7 | T | 561 |
| C/1998 H1 | 1998 07 20.90000 | 12 19 39.86 | +50 44 26.5 | 17.0 | T | 561 |