| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/1998 J1 | 1998 05 20.38359 | 05 19 09.73 | +04 33 04.3 | 7.1 | N | 426 |
| C/1998 J1 | 1998 05 20.38547 | 05 19 10.55 | +04 32 50.2 | 7.2 | N | 426 |
| C/1998 J1 | 1998 05 20.38827 | 05 19 11.75 | +04 32 29.1 | 7.1 | N | 426 |
| C/1998 J1 | 1998 05 20.39113 | 05 19 13.04 | +04 32 07.1 | 7.0 | N | 426 |
| C/1998 J1 | 1998 05 20.39359 | 05 19 14.20 | +04 31 48.2 | 7.0 | N | 426 |
| C/1998 J1 | 1998 05 20.39612 | 05 19 15.26 | +04 31 29.7 | 6.9 | N | 426 |
| C/1998 J1 | 1998 05 20.39791 | 05 19 16.03 | +04 31 16.7 | 6.6 | N | 426 |
| C/1998 J1 | 1998 05 21.35881 | 05 26 04.79 | +02 33 06.0 | 9.3 | N | 422 |
| C/1998 J1 | 1998 05 21.35946 | 05 26 05.06 | +02 33 00.9 | 9.4 | N | 422 |
| C/1998 J1 | 1998 05 21.36012 | 05 26 05.31 | +02 32 56.2 | 9.2 | N | 422 |
| C/1998 J1 | 1998 05 21.36155 | 05 26 05.96 | +02 32 45.6 | 422 | ||
| C/1998 J1 | 1998 05 21.36227 | 05 26 06.26 | +02 32 40.5 | 422 | ||
| C/1998 J1 | 1998 05 21.36300 | 05 26 06.52 | +02 32 35.1 | 422 | ||
| C/1998 J1 | 1998 05 21.36372 | 05 26 06.81 | +02 32 30.2 | 422 | ||
| C/1998 J1 | 1998 05 21.36445 | 05 26 07.15 | +02 32 24.4 | 422 | ||
| C/1998 J1 | 1998 05 21.36517 | 05 26 07.44 | +02 32 19.2 | 422 | ||
| C/1998 J1 | 1998 05 21.37578 | 05 26 11.85 | +02 31 02.0 | 7.0 | N | 426 |
| C/1998 J1 | 1998 05 21.37648 | 05 26 12.03 | +02 30 58.4 | 9.0 | N | 422 |
| C/1998 J1 | 1998 05 21.37943 | 05 26 13.37 | +02 30 35.4 | 7.4 | N | 426 |
| C/1998 J1 | 1998 05 21.38423 | 05 26 15.40 | +02 30 00.1 | 7.3 | N | 426 |