| Primary satellite | Secondary satellite |
| Name | Sich 1 | COSMO-SKYMED 1 |
| Spacetrack catalog number | 23657 | 31598 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 10 13:25 | 2021 Apr 10 20:40 |
| Time of closest approach (UTC) | 2021 Mar 06 02:20:05.181 |
| Minimum distance | 2.560 km |
| Height difference | -2.224 km |
| Relative speed | 15.065 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 81.3°N, 13.1°W |
| Height | 639 km |
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