| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 04 27.22020 | 15 24 10.35 | +13 16 53.8 | 750 | ||
| C/1998 H1 | 1998 04 27.23724 | 15 24 03.48 | +13 19 31.9 | 750 | ||
| C/1998 H1 | 1998 04 27.28980 | 15 23 42.36 | +13 27 38.2 | 16.5 | N | 750 |
| C/1998 H1 | 1998 04 27.29582 | 15 23 39.91 | +13 28 33.4 | 16.2 | N | 750 |
| C/1998 H1 | 1998 04 27.30278 | 15 23 37.10 | +13 29 38.1 | 16.1 | N | 750 |
| C/1998 H1 | 1998 04 27.31207 | 15 23 33.37 | +13 31 03.7 | 16.4 | N | 750 |
| C/1998 H1 | 1998 04 27.31440 | 15 23 32.42 | +13 31 25.4 | 16.3 | N | 750 |
| C/1998 H1 | 1998 04 27.54936 | 15 21 59.57 | +14 07 28.7 | 12.4 | T | 900 |
| C/1998 H1 | 1998 04 27.55503 | 15 21 57.26 | +14 08 20.9 | 900 | ||
| C/1998 H1 | 1998 04 27.56163 | 15 21 54.62 | +14 09 22.0 | 867 | ||
| C/1998 H1 | 1998 04 27.56898 | 15 21 51.67 | +14 10 28.9 | 867 | ||
| C/1998 H1 | 1998 04 27.57309 | 15 21 50.02 | +14 11 06.6 | 867 | ||
| C/1998 H1 | 1998 04 27.68980 | 15 21 02.64 | +14 29 11.7 | 15.5 | N | 422 |
| C/1998 H1 | 1998 04 27.69090 | 15 21 02.18 | +14 29 21.7 | 15.5 | N | 422 |
| C/1998 H1 | 1998 04 27.69200 | 15 21 01.74 | +14 29 31.6 | 15.2 | N | 422 |
| C/1998 H1 | 1998 04 27.69792 | 15 20 59.57 | +14 30 10.0 | 896 | ||
| C/1998 H1 | 1998 04 27.70417 | 15 20 57.04 | +14 31 06.9 | 896 | ||
| C/1998 H1 | 1998 04 27.70833 | 15 20 55.36 | +14 31 44.5 | 896 | ||
| C/1998 H1 | 1998 04 27.83149 | 15 20 07.12 | +14 50 20.2 | 557 | ||
| C/1998 H1 | 1998 04 27.83242 | 15 20 06.73 | +14 50 29.0 | 557 |