| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 05 15.05554 | 13 36 45.73 | +42 16 06.1 | 14.9 | T | 758 |
| C/1998 H1 | 1998 05 15.05926 | 13 36 44.43 | +42 16 16.4 | 14.7 | T | 758 |
| C/1998 H1 | 1998 05 15.06566 | 13 36 42.64 | +42 16 35.1 | 15.0 | T | 758 |
| C/1998 H1 | 1998 05 15.20343 | 13 36 02.88 | +42 22 54.0 | 16.1 | T | 700 |
| C/1998 H1 | 1998 05 15.20858 | 13 36 01.47 | +42 23 07.6 | 15.5 | T | 700 |
| C/1998 H1 | 1998 05 16.18470 | 13 31 28.34 | +43 05 55.1 | 15.4 | T | 700 |
| C/1998 H1 | 1998 05 16.18828 | 13 31 27.40 | +43 06 03.5 | 15.4 | T | 700 |
| C/1998 H1 | 1998 05 16.19177 | 13 31 26.45 | +43 06 11.4 | 15.4 | T | 700 |
| C/1998 H1 | 1998 05 16.25469 | 13 31 09.08 | +43 08 49.4 | 14.5 | T | 670 |
| C/1998 H1 | 1998 05 16.26840 | 13 31 05.23 | +43 09 23.7 | 670 | ||
| C/1998 H1 | 1998 05 16.29149 | 13 30 58.76 | +43 10 22.5 | 670 | ||
| C/1998 H1 | 1998 05 16.89962 | 13 28 14.46 | +43 35 00.4 | 15.5 | T | 610 |
| C/1998 H1 | 1998 05 16.90840 | 13 28 12.13 | +43 35 22.6 | 610 | ||
| C/1998 H1 | 1998 05 16.91206 | 13 28 11.16 | +43 35 31.8 | 610 | ||
| C/1998 H1 | 1998 05 16.91471 | 13 28 10.46 | +43 35 38.5 | 610 | ||
| C/1998 H1 | 1998 05 16.92042 | 13 28 08.94 | +43 35 52.9 | 610 | ||
| C/1998 H1 | 1998 05 16.99801 | 13 27 47.77 | +43 38 50.4 | 13.3 | T | 118 |
| C/1998 H1 | 1998 05 17.51205 | 13 25 32.91 | +43 58 36.6 | 13.7 | T | 355 |
| C/1998 H1 | 1998 05 17.51310 | 13 25 32.67 | +43 58 38.7 | 355 | ||
| C/1998 H1 | 1998 05 17.91814 | 13 23 47.64 | +44 13 31.4 | 14.7 | T | 560 |