| Primary satellite | Secondary satellite |
| Name | Cosmos 1908 Rocket | Cosmos 1707 Rocket |
| Spacetrack catalog number | 18749 | 16327 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 14 22:10 | 2021 Jan 15 04:44 |
| Time of closest approach (UTC) | 2020 Dec 08 00:15:00.234 |
| Minimum distance | 4.581 km |
| Height difference | 4.045 km |
| Relative speed | 14.486 km/s |
| Angle between velocity vectors | 147° |
| Geographic position | 63.1°N, 80.9°W |
| Height | 619 km |
|