| Primary satellite | Secondary satellite |
| Name | Cosmos 773 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 8344 | 29963 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 22 13:35 | 2021 Apr 22 10:13 |
| Time of closest approach (UTC) | 2021 Mar 04 11:17:56.797 |
| Minimum distance | 1.273 km |
| Height difference | 1.104 km |
| Relative speed | 9.925 km/s |
| Angle between velocity vectors | 83° |
| Geographic position | 70.6°S, 48.0°E |
| Height | 803 km |
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