| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 8344 | 35480 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 20 21:32 | 2021 Apr 19 01:28 |
| Time of closest approach (UTC) | 2021 Mar 05 04:00:51.544 |
| Minimum distance | 56.746 km |
| Height difference | -7.015 km |
| Relative speed | 10.657 km/s |
| Angle between velocity vectors | 91° |
| Geographic position | 73.5°S, 175.6°E |
| Height | 803 km |
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