| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 H1 | 1998 04 28.88936 | 15 13 04.67 | +17 27 39.9 | 504 | ||
| C/1998 H1 | 1998 04 28.89003 | 15 13 04.40 | +17 27 45.9 | 504 | ||
| C/1998 H1 | 1998 04 28.89133 | 15 13 03.89 | +17 27 56.8 | 504 | ||
| C/1998 H1 | 1998 04 28.89182 | 15 13 03.73 | +17 28 01.2 | 504 | ||
| C/1998 H1 | 1998 04 28.89249 | 15 13 03.46 | +17 28 07.7 | 504 | ||
| C/1998 H1 | 1998 04 28.91885 | 15 12 52.72 | +17 31 57.1 | 046 | ||
| C/1998 H1 | 1998 04 28.92108 | 15 12 51.81 | +17 32 17.3 | 046 | ||
| C/1998 H1 | 1998 04 28.92241 | 15 12 51.26 | +17 32 29.8 | 046 | ||
| C/1998 H1 | 1998 04 29.15851 | 15 11 17.01 | +18 06 34.3 | 12.3 | T | 784 |
| C/1998 H1 | 1998 04 29.16146 | 15 11 15.86 | +18 07 07.4 | 13.4 | N | 784 |
| C/1998 H1 | 1998 04 29.16372 | 15 11 14.93 | +18 07 19.9 | 12.2 | T | 784 |
| C/1998 H1 | 1998 04 29.16615 | 15 11 14.01 | +18 07 48.0 | 13.0 | N | 784 |
| C/1998 H1 | 1998 04 29.16875 | 15 11 12.80 | +18 08 04.2 | 12.4 | T | 784 |
| C/1998 H1 | 1998 04 29.17083 | 15 11 12.10 | +18 08 21.2 | 12.6 | T | 784 |
| C/1998 H1 | 1998 04 29.17309 | 15 11 11.13 | +18 08 45.8 | 13.1 | N | 784 |
| C/1998 H1 | 1998 04 29.17932 | 15 11 08.57 | +18 09 35.8 | 12.5 | T | 784 |
| C/1998 H1 | 1998 04 29.18992 | 15 11 04.77 | +18 11 14.3 | 14.1 | T | 700 |
| C/1998 H1 | 1998 04 29.20194 | 15 10 59.85 | +18 12 59.3 | 14.3 | T | 700 |
| C/1998 H1 | 1998 04 29.21394 | 15 10 55.05 | +18 14 42.6 | 14.1 | T | 700 |
| C/1998 H1 | 1998 04 29.24302 | 15 10 43.40 | +18 18 54.6 | 14.3 | T | 700 |