| Primary satellite | Secondary satellite |
| Name | SKYMED 3 | Cosmos 1633 Rocket |
| Spacetrack catalog number | 33412 | 15593 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 12 11:58 | 2021 Apr 12 07:28 |
| Time of closest approach (UTC) | 2021 Mar 05 20:20:15.869 |
| Minimum distance | 9.174 km |
| Height difference | 0.880 km |
| Relative speed | 15.087 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 76.7°N, 3.1°W |
| Height | 636 km |
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