| Name | Date/time | RA | Dec | Magnitude | Filter | Site Code |
|---|---|---|---|---|---|---|
| C/2021 S4 | 2023 11 24.47378 | 04 52 02.68 | +41 42 13.6 | 17.0 | o | T05 |
| C/2021 S4 | 2023 11 24.50907 | 04 52 01.72 | +41 42 15.3 | 17.2 | o | T05 |
| C/2021 S4 | 2023 11 24.51611 | 04 52 01.56 | +41 42 15.5 | 17.0 | o | T05 |
| C/2021 S4 | 2023 11 25.83797 | 04 51 28.17 | +41 43 15.4 | M31 | ||
| C/2021 S4 | 2023 11 25.84229 | 04 51 28.22 | +41 43 15.9 | M31 | ||
| C/2021 S4 | 2023 11 25.84516 | 04 51 28.24 | +41 43 16.0 | M31 | ||
| C/2021 S4 | 2023 12 03.02758 | 04 48 22.14 | +41 46 41.3 | 16.8 | G | I81 |
| C/2021 S4 | 2023 12 03.03188 | 04 48 22.03 | +41 46 41.6 | 16.8 | G | I81 |
| C/2021 S4 | 2023 12 03.03617 | 04 48 21.90 | +41 46 41.6 | 16.8 | G | I81 |
| C/2021 S4 | 2023 12 03.45634 | 04 48 10.81 | +41 46 48.2 | 16.9 | o | T05 |
| C/2021 S4 | 2023 12 03.45950 | 04 48 10.72 | +41 46 48.4 | 16.9 | o | T05 |
| C/2021 S4 | 2023 12 03.46503 | 04 48 10.56 | +41 46 48.2 | 17.1 | o | T05 |
| C/2021 S4 | 2023 12 03.48733 | 04 48 09.96 | +41 46 48.6 | 16.9 | o | T05 |
| C/2021 S4 | 2023 12 03.81892 | 04 48 01.54 | +41 46 51.8 | 17.3 | T | K77 |
| C/2021 S4 | 2023 12 03.83876 | 04 48 00.99 | +41 46 51.9 | 17.3 | T | K77 |
| C/2021 S4 | 2023 12 04.44820 | 04 47 44.60 | +41 46 58.1 | 16.9 | o | T05 |
| C/2021 S4 | 2023 12 04.45321 | 04 47 44.44 | +41 46 58.8 | 16.7 | o | T05 |
| C/2021 S4 | 2023 12 04.45640 | 04 47 44.39 | +41 46 58.4 | 17.9 | o | T05 |
| C/2021 S4 | 2023 12 04.49186 | 04 47 43.42 | +41 46 58.9 | 16.7 | o | T05 |
| C/2021 S4 | 2023 12 05.42123 | 04 47 18.82 | +41 47 04.1 | 17.7 | G | V21 |