| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | IRIDIUM 142 |
| Spacetrack catalog number | 8344 | 43256 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 17 03:27 | 2021 Apr 16 19:14 |
| Time of closest approach (UTC) | 2021 Mar 06 13:19:49.834 |
| Minimum distance | 5.593 km |
| Height difference | 1.056 km |
| Relative speed | 13.099 km/s |
| Angle between velocity vectors | 123° |
| Geographic position | 68.1°S, 2.9°E |
| Height | 802 km |
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