| Primary satellite | Secondary satellite |
| Name | Cosmos 1356 Rocket | SJ-12 |
| Spacetrack catalog number | 13154 | 36596 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 07 18:29 | 2021 Mar 07 13:23 |
| Time of closest approach (UTC) | 2021 Jan 23 19:03:27.468 |
| Minimum distance | 2.895 km |
| Height difference | -0.803 km |
| Relative speed | 15.053 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 79.9°N, 165.8°W |
| Height | 599 km |
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