| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | IRIDIUM 33 DEB |
| Spacetrack catalog number | 15755 | 34145 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Oct 01 21:13 | 2023 Oct 01 20:56 |
| Time of closest approach (UTC) | 2023 Jun 16 20:01:28.293 |
| Minimum distance | 4886.782 km |
| Height difference | 14.826 km |
| Relative speed | 8.455 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 67.2°S, 96.5°E |
| Height | 825 km |
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