| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 H3 | 1999 05 21.59568 | 18 19 07.84 | +54 14 41.9 | 903 | ||
| C/1999 H3 | 1999 05 21.59949 | 18 19 07.15 | +54 14 45.6 | 15.0 | T | 903 |
| C/1999 H3 | 1999 05 22.20923 | 18 17 18.84 | +54 24 53.0 | 16.8 | T | 750 |
| C/1999 H3 | 1999 05 22.21421 | 18 17 18.00 | +54 24 57.0 | 17.1 | T | 750 |
| C/1999 H3 | 1999 05 22.21841 | 18 17 17.21 | +54 25 01.3 | 17.3 | T | 750 |
| C/1999 H3 | 1999 05 27.15254 | 18 01 46.56 | +55 39 54.7 | 16.2 | T | 750 |
| C/1999 H3 | 1999 05 27.16042 | 18 01 44.98 | +55 40 01.4 | 16.3 | T | 750 |
| C/1999 H3 | 1999 05 27.20091 | 18 01 36.95 | +55 40 35.6 | 16.6 | T | 750 |
| C/1999 H3 | 1999 05 27.99190 | 17 58 59.03 | +55 51 21.3 | 046 | ||
| C/1999 H3 | 1999 05 27.99317 | 17 58 58.77 | +55 51 22.4 | 046 | ||
| C/1999 H3 | 1999 05 27.99428 | 17 58 58.53 | +55 51 23.2 | 046 | ||
| C/1999 H3 | 1999 05 29.53465 | 17 53 45.12 | +56 11 15.8 | 15.2 | T | 351 |
| C/1999 H3 | 1999 05 29.54134 | 17 53 43.74 | +56 11 21.5 | 351 | ||
| C/1999 H3 | 1999 05 29.54713 | 17 53 42.55 | +56 11 26.4 | 351 | ||
| C/1999 H3 | 1999 05 29.59354 | 17 53 32.79 | +56 12 01.9 | 355 | ||
| C/1999 H3 | 1999 05 29.59561 | 17 53 32.31 | +56 12 02.7 | 355 | ||
| C/1999 H3 | 1999 05 29.59817 | 17 53 31.81 | +56 12 04.9 | 355 | ||
| C/1999 H3 | 1999 05 29.62971 | 17 53 25.41 | +56 12 29.1 | 14.4 | T | 900 |
| C/1999 H3 | 1999 05 29.64597 | 17 53 22.02 | +56 12 40.8 | 900 | ||
| C/1999 H3 | 1999 05 29.67876 | 17 53 15.09 | +56 13 05.1 | 15.2 | T | 903 |