| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 8344 | 30492 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 12 08:20 | 2021 Apr 11 23:17 |
| Time of closest approach (UTC) | 2021 Mar 04 18:58:19.814 |
| Minimum distance | 168.528 km |
| Height difference | 5.222 km |
| Relative speed | 7.798 km/s |
| Angle between velocity vectors | 63° |
| Geographic position | 61.3°N, 153.0°W |
| Height | 761 km |
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