| Primary satellite | Secondary satellite |
| Name | Cosmos 1908 Rocket | SJ-9A |
| Spacetrack catalog number | 18749 | 38860 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 14 22:10 | 2021 Jan 15 03:40 |
| Time of closest approach (UTC) | 2020 Dec 04 00:45:57.472 |
| Minimum distance | 5.907 km |
| Height difference | 4.189 km |
| Relative speed | 15.126 km/s |
| Angle between velocity vectors | 180° |
| Geographic position | 54.2°N, 76.5°W |
| Height | 616 km |
|