| Primary satellite | Secondary satellite |
| Name | Cosmos 1408 Rocket | CZ-4 DEB |
| Spacetrack catalog number | 13553 | 26650 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 04:57 | 2021 Apr 13 19:16 |
| Time of closest approach (UTC) | 2021 Mar 05 08:28:32.633 |
| Minimum distance | 13.234 km |
| Height difference | 0.273 km |
| Relative speed | 14.560 km/s |
| Angle between velocity vectors | 150° |
| Geographic position | 81.3°N, 119.2°W |
| Height | 642 km |
|