| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | IRIDIUM 33 DEB |
| Spacetrack catalog number | 15755 | 35479 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 20 13:16 | 2023 Mar 19 00:04 |
| Time of closest approach (UTC) | 2023 Feb 03 15:27:52.964 |
| Minimum distance | 2393.024 km |
| Height difference | -24.817 km |
| Relative speed | 14.594 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 70.4°N, 56.0°E |
| Height | 811 km |
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