| Primary satellite | Secondary satellite |
| Name | COSMO-SKYMED 1 | FENGYUN 1C DEB |
| Spacetrack catalog number | 31598 | 29872 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 22 12:59 | 2021 Apr 21 21:29 |
| Time of closest approach (UTC) | 2021 Mar 06 04:04:34.277 |
| Minimum distance | 61.637 km |
| Height difference | 0.480 km |
| Relative speed | 14.315 km/s |
| Angle between velocity vectors | 141° |
| Geographic position | 64.1°N, 138.3°W |
| Height | 634 km |
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