| Primary satellite | Secondary satellite |
| Name | COSMO-SKYMED 1 | Sich 1 |
| Spacetrack catalog number | 31598 | 23657 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 11 04:46 | 2021 Apr 11 03:58 |
| Time of closest approach (UTC) | 2021 Mar 06 02:20:14.949 |
| Minimum distance | 6.264 km |
| Height difference | 2.269 km |
| Relative speed | 15.065 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 81.1°N, 9.8°W |
| Height | 636 km |
|