| Primary satellite | Secondary satellite |
| Name | SJ-12 | Cosmos 1356 Rocket |
| Spacetrack catalog number | 36596 | 13154 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 05 21:17 | 2021 Mar 05 21:38 |
| Time of closest approach (UTC) | 2021 Jan 23 17:27:24.280 |
| Minimum distance | 11.257 km |
| Height difference | 1.001 km |
| Relative speed | 15.055 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 80.1°N, 140.5°W |
| Height | 598 km |
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