| Primary satellite | Secondary satellite |
| Name | COSMO-SKYMED 1 | IRIDIUM 33 DEB |
| Spacetrack catalog number | 31598 | 35624 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 22 12:59 | 2021 Apr 22 04:28 |
| Time of closest approach (UTC) | 2021 Mar 06 16:05:20.566 |
| Minimum distance | 126.872 km |
| Height difference | 1.293 km |
| Relative speed | 14.289 km/s |
| Angle between velocity vectors | 143° |
| Geographic position | 80.2°S, 27.5°W |
| Height | 650 km |
|