| Primary satellite | Secondary satellite |
| Name | Cosmos 1680 Rocket | Iridium 26 |
| Spacetrack catalog number | 16012 | 24903 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 09 17:21 | 2021 Apr 09 18:00 |
| Time of closest approach (UTC) | 2021 Mar 01 05:05:38.840 |
| Minimum distance | 29.805 km |
| Height difference | -6.687 km |
| Relative speed | 13.051 km/s |
| Angle between velocity vectors | 122° |
| Geographic position | 68.2°S, 163.0°E |
| Height | 806 km |
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