| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 H3 | 1999 04 25.00831 | 19 14 03.48 | +45 09 43.8 | 15.5 | T | 958 |
| C/1999 H3 | 1999 04 25.02733 | 19 14 01.84 | +45 10 09.6 | 15.9 | T | 958 |
| C/1999 H3 | 1999 04 25.04423 | 19 14 00.39 | +45 10 31.5 | 15.9 | T | 958 |
| C/1999 H3 | 1999 04 25.05561 | 19 13 59.67 | +45 10 48.7 | 16.0 | T | 958 |
| C/1999 H3 | 1999 04 25.08085 | 19 13 57.66 | +45 11 21.5 | 15.1 | T | 958 |
| C/1999 H3 | 1999 04 26.05376 | 19 12 41.37 | +45 32 58.3 | 15.0 | T | 104 |
| C/1999 H3 | 1999 04 26.76823 | 19 11 43.44 | +45 48 51.5 | 14.6 | T | 360 |
| C/1999 H3 | 1999 04 26.77066 | 19 11 43.26 | +45 48 54.8 | 360 | ||
| C/1999 H3 | 1999 04 26.77309 | 19 11 43.05 | +45 48 58.0 | 360 | ||
| C/1999 H3 | 1999 04 29.01008 | 19 08 31.54 | +46 38 30.6 | 118 | ||
| C/1999 H3 | 1999 04 29.01188 | 19 08 31.36 | +46 38 33.3 | 118 | ||
| C/1999 H3 | 1999 04 29.01355 | 19 08 31.25 | +46 38 35.6 | 15.3 | T | 118 |
| C/1999 H3 | 1999 04 29.64478 | 19 07 34.28 | +46 52 32.5 | 355 | ||
| C/1999 H3 | 1999 04 29.65822 | 19 07 33.05 | +46 52 50.5 | 15.3 | T | 355 |
| C/1999 H3 | 1999 04 29.66797 | 19 07 32.11 | +46 53 03.8 | 355 | ||
| C/1999 H3 | 1999 04 29.70629 | 19 07 28.53 | +46 53 54.6 | 897 | ||
| C/1999 H3 | 1999 04 29.71234 | 19 07 27.99 | +46 54 02.9 | 15.1 | T | 897 |
| C/1999 H3 | 1999 04 30.53748 | 19 06 11.44 | +47 12 12.1 | 15.1 | T | 402 |
| C/1999 H3 | 1999 04 30.53874 | 19 06 11.35 | +47 12 13.4 | 402 | ||
| C/1999 H3 | 1999 04 30.54000 | 19 06 11.19 | +47 12 15.3 | 402 |