| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 04 27.83336 | 15 20 06.37 | +14 50 37.3 | 557 | ||
| C/1998 H1 | 1998 04 27.83429 | 15 20 05.99 | +14 50 45.6 | 557 | ||
| C/1998 H1 | 1998 04 27.84626 | 15 20 01.18 | +14 52 35.4 | 12.5 | T | 046 |
| C/1998 H1 | 1998 04 27.84845 | 15 20 00.30 | +14 52 55.2 | 046 | ||
| C/1998 H1 | 1998 04 27.84973 | 15 19 59.79 | +14 53 06.8 | 046 | ||
| C/1998 H1 | 1998 04 27.85051 | 15 19 59.48 | +14 53 13.9 | 046 | ||
| C/1998 H1 | 1998 04 27.86823 | 15 19 52.52 | +14 55 54.5 | 620 | ||
| C/1998 H1 | 1998 04 27.87135 | 15 19 51.31 | +14 56 24.2 | 620 | ||
| C/1998 H1 | 1998 04 27.88041 | 15 19 47.35 | +14 57 48.6 | 13.0 | T | 106 |
| C/1998 H1 | 1998 04 27.88148 | 15 19 47.16 | +14 57 55.5 | 13.3 | N | 620 |
| C/1998 H1 | 1998 04 27.88342 | 15 19 46.20 | +14 58 15.7 | 106 | ||
| C/1998 H1 | 1998 04 27.88490 | 15 19 45.82 | +14 58 27.3 | 620 | ||
| C/1998 H1 | 1998 04 27.89359 | 15 19 42.09 | +14 59 48.1 | 106 | ||
| C/1998 H1 | 1998 04 27.89677 | 15 19 40.80 | +15 00 16.8 | 106 | ||
| C/1998 H1 | 1998 04 27.89867 | 15 19 40.31 | +15 00 30.6 | 620 | ||
| C/1998 H1 | 1998 04 27.90198 | 15 19 38.72 | +15 01 03.7 | 106 | ||
| C/1998 H1 | 1998 04 27.90744 | 15 19 36.50 | +15 01 53.9 | 106 | ||
| C/1998 H1 | 1998 04 27.91480 | 15 19 33.57 | +15 03 00.2 | 106 | ||
| C/1998 H1 | 1998 04 28.20671 | 15 17 37.13 | +15 46 51.2 | 750 | ||
| C/1998 H1 | 1998 04 28.21609 | 15 17 33.30 | +15 48 15.6 | 750 |