| 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 20 02:04:42.879 |
| Minimum distance | 9.359 km |
| Height difference | -1.661 km |
| Relative speed | 15.124 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 69.7°S, 118.9°W |
| Height | 594 km |
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