| Primary satellite | Secondary satellite |
| Name | Cosmos 1328 | STARLINK-3849 |
| Spacetrack catalog number | 12987 | 52343 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Sep 24 12:05 | 2023 Sep 24 16:40 |
| Time of closest approach (UTC) | 2023 May 31 23:07:27.144 |
| Minimum distance | 5862.573 km |
| Height difference | 20.639 km |
| Relative speed | 15.197 km/s |
| Angle between velocity vectors | 175° |
| Geographic position | 67.6°N, 62.8°E |
| Height | 531 km |
|