| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 04 26.53337 | 15 28 43.45 | +11 30 16.3 | 15.3 | N | 422 |
| C/1998 H1 | 1998 04 26.53461 | 15 28 42.94 | +11 30 28.0 | 15.2 | N | 422 |
| C/1998 H1 | 1998 04 26.53586 | 15 28 42.44 | +11 30 39.7 | 15.3 | N | 422 |
| C/1998 H1 | 1998 04 26.53756 | 15 28 41.76 | +11 30 55.8 | 15.4 | N | 422 |
| C/1998 H1 | 1998 04 26.53865 | 15 28 41.30 | +11 31 06.0 | 15.2 | N | 422 |
| C/1998 H1 | 1998 04 26.61007 | 15 28 12.87 | +11 42 01.5 | 360 | ||
| C/1998 H1 | 1998 04 26.61215 | 15 28 12.04 | +11 42 21.4 | 360 | ||
| C/1998 H1 | 1998 04 26.61424 | 15 28 11.19 | +11 42 41.0 | 360 | ||
| C/1998 H1 | 1998 04 26.67567 | 15 27 46.45 | +11 52 18.0 | 12.4 | T | 900 |
| C/1998 H1 | 1998 04 26.67660 | 15 27 45.79 | +11 52 43.1 | 14.8 | N | 422 |
| C/1998 H1 | 1998 04 26.67763 | 15 27 45.42 | +11 52 53.4 | 14.8 | N | 422 |
| C/1998 H1 | 1998 04 26.68012 | 15 27 44.64 | +11 53 00.2 | 900 | ||
| C/1998 H1 | 1998 04 26.69787 | 15 27 37.49 | +11 55 45.8 | 12.4 | T | 402 |
| C/1998 H1 | 1998 04 26.70065 | 15 27 36.37 | +11 56 11.8 | 402 | ||
| C/1998 H1 | 1998 04 26.70620 | 15 27 34.18 | +11 57 02.9 | 402 | ||
| C/1998 H1 | 1998 04 26.74427 | 15 27 18.83 | +12 03 00.1 | 12.5 | T | 867 |
| C/1998 H1 | 1998 04 26.74566 | 15 27 18.29 | +12 03 12.9 | 867 | ||
| C/1998 H1 | 1998 04 26.74608 | 15 27 18.08 | +12 03 18.6 | 12.3 | T | 402 |
| C/1998 H1 | 1998 04 26.74677 | 15 27 17.80 | +12 03 25.2 | 402 | ||
| C/1998 H1 | 1998 04 26.74885 | 15 27 16.98 | +12 03 44.6 | 402 |