| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | deb Delta 139 |
| Spacetrack catalog number | 8344 | 12283 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 11 22:20 | 2021 Apr 11 22:03 |
| Time of closest approach (UTC) | 2021 Mar 08 07:58:47.163 |
| Minimum distance | 5.659 km |
| Height difference | -1.420 km |
| Relative speed | 10.962 km/s |
| Angle between velocity vectors | 94° |
| Geographic position | 72.3°N, 29.8°W |
| Height | 762 km |
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