| Primary satellite | Secondary satellite |
| Name | COSMOS 2428 | FENGYUN 1C DEB |
| Spacetrack catalog number | 31792 | 30811 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 00:32 | 2021 Apr 12 12:04 |
| Time of closest approach (UTC) | 2021 Mar 01 10:50:11.735 |
| Minimum distance | 10.618 km |
| Height difference | 2.823 km |
| Relative speed | 14.782 km/s |
| Angle between velocity vectors | 164° |
| Geographic position | 48.7°S, 107.8°E |
| Height | 868 km |
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