| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 H3 | 1999 05 08.63167 | 18 51 31.63 | +50 06 52.0 | 352 | ||
| C/1999 H3 | 1999 05 11.69972 | 18 44 53.42 | +51 10 07.8 | 14.3 | T | 900 |
| C/1999 H3 | 1999 05 11.71296 | 18 44 51.61 | +51 10 24.2 | 900 | ||
| C/1999 H3 | 1999 05 12.42396 | 18 43 13.91 | +51 24 41.9 | 16.9 | T | 704 |
| C/1999 H3 | 1999 05 12.43271 | 18 43 12.56 | +51 24 54.5 | 17.8 | T | 704 |
| C/1999 H3 | 1999 05 12.44207 | 18 43 11.36 | +51 25 08.1 | 704 | ||
| C/1999 H3 | 1999 05 12.45099 | 18 43 09.76 | +51 25 19.2 | 17.2 | T | 704 |
| C/1999 H3 | 1999 05 13.73108 | 18 40 08.98 | +51 50 43.8 | 14.6 | T | 360 |
| C/1999 H3 | 1999 05 13.73351 | 18 40 08.61 | +51 50 46.5 | 360 | ||
| C/1999 H3 | 1999 05 13.89868 | 18 39 44.92 | +51 54 00.1 | 15.2 | T | 046 |
| C/1999 H3 | 1999 05 13.89983 | 18 39 44.75 | +51 54 01.6 | 046 | ||
| C/1999 H3 | 1999 05 13.90113 | 18 39 44.56 | +51 54 03.0 | 046 | ||
| C/1999 H3 | 1999 05 13.90271 | 18 39 44.37 | +51 54 04.4 | 046 | ||
| C/1999 H3 | 1999 05 13.90384 | 18 39 44.17 | +51 54 06.3 | 046 | ||
| C/1999 H3 | 1999 05 16.63189 | 18 32 53.43 | +52 46 30.2 | 903 | ||
| C/1999 H3 | 1999 05 16.63707 | 18 32 52.74 | +52 46 35.2 | 12.8 | T | 903 |
| C/1999 H3 | 1999 05 17.56141 | 18 30 26.59 | +53 03 44.4 | 903 | ||
| C/1999 H3 | 1999 05 17.62505 | 18 30 16.36 | +53 04 54.3 | 903 | ||
| C/1999 H3 | 1999 05 17.63205 | 18 30 15.25 | +53 05 02.5 | 903 | ||
| C/1999 H3 | 1999 05 19.13647 | 18 26 09.69 | +53 32 14.6 | 17.3 | T | 750 |
