| Primary satellite | Secondary satellite |
| Name | COSMO-SKYMED 1 | Cosmos 1633 Rocket |
| Spacetrack catalog number | 31598 | 15593 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 21 01:20 | 2021 Apr 21 06:38 |
| Time of closest approach (UTC) | 2021 Mar 06 15:33:35.815 |
| Minimum distance | 2.910 km |
| Height difference | 1.749 km |
| Relative speed | 15.091 km/s |
| Angle between velocity vectors | 179° |
| Geographic position | 36.2°N, 38.8°E |
| Height | 627 km |
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