| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1999 N4 | 1999 07 16.23967 | 19 08 57.08 | +01 03 39.1 | 18.5 | N | 704 |
| C/1999 N4 | 1999 07 16.26520 | 19 08 55.21 | +01 03 36.4 | 18.7 | N | 704 |
| C/1999 N4 | 1999 07 16.27803 | 19 08 54.26 | +01 03 36.1 | 18.5 | N | 704 |
| C/1999 N4 | 1999 07 16.89149 | 19 08 10.23 | +01 02 51.3 | 611 | ||
| C/1999 N4 | 1999 07 16.90024 | 19 08 09.57 | +01 02 49.7 | 17.9 | N | 143 |
| C/1999 N4 | 1999 07 16.90314 | 19 08 09.30 | +01 02 51.4 | 611 | ||
| C/1999 N4 | 1999 07 16.90601 | 19 08 09.17 | +01 02 50.6 | 18.1 | N | 143 |
| C/1999 N4 | 1999 07 16.91177 | 19 08 08.76 | +01 02 50.0 | 18.2 | N | 143 |
| C/1999 N4 | 1999 07 16.91753 | 19 08 08.18 | +01 02 49.9 | 557 | ||
| C/1999 N4 | 1999 07 16.94714 | 19 08 05.97 | +01 02 47.1 | 621 | ||
| C/1999 N4 | 1999 07 16.96531 | 19 08 04.75 | +01 02 45.3 | 557 | ||
| C/1999 N4 | 1999 07 16.96694 | 19 08 04.65 | +01 02 46.0 | 557 | ||
| C/1999 N4 | 1999 07 16.97211 | 19 08 04.22 | +01 02 44.9 | 18.8 | N | 621 |
| C/1999 N4 | 1999 07 17.05664 | 19 07 58.12 | +01 02 39.7 | 18.3 | N | 621 |
| C/1999 N4 | 1999 07 17.06639 | 19 07 57.40 | +01 02 38.8 | 621 | ||
| C/1999 N4 | 1999 07 17.54957 | 19 07 22.77 | +01 02 03.8 | 17.9 | T | 428 |
| C/1999 N4 | 1999 07 17.55493 | 19 07 22.36 | +01 02 04.1 | 17.5 | T | 426 |
| C/1999 N4 | 1999 07 17.56428 | 19 07 21.67 | +01 02 03.5 | 17.3 | T | 426 |
| C/1999 N4 | 1999 07 17.56705 | 19 07 21.48 | +01 02 02.2 | 17.2 | T | 426 |
| C/1999 N4 | 1999 07 17.86887 | 19 06 59.75 | +01 01 37.8 | 17.4 | T | 046 |