| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 8344 | 38233 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 17 03:27 | 2021 Apr 15 02:56 |
| Time of closest approach (UTC) | 2021 Mar 02 13:29:15.764 |
| Minimum distance | 151.742 km |
| Height difference | 3.395 km |
| Relative speed | 8.477 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 73.9°N, 112.7°W |
| Height | 759 km |
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