| Primary satellite | Secondary satellite |
| Name | Cosmos 1408 Rocket | TECHNOSAT |
| Spacetrack catalog number | 13553 | 42829 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 11 19:54 | 2021 Apr 12 02:15 |
| Time of closest approach (UTC) | 2021 Mar 01 06:35:23.797 |
| Minimum distance | 63.673 km |
| Height difference | -2.281 km |
| Relative speed | 12.962 km/s |
| Angle between velocity vectors | 118° |
| Geographic position | 81.1°S, 99.4°E |
| Height | 630 km |
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