| Primary satellite | Secondary satellite |
| Name | Cosmos 1825 | FENGYUN 1C DEB |
| Spacetrack catalog number | 17566 | 30734 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 25 08:44 | 2021 Feb 25 08:24 |
| Time of closest approach (UTC) | 2021 Jan 20 17:35:36.576 |
| Minimum distance | 103.793 km |
| Height difference | -7.757 km |
| Relative speed | 15.217 km/s |
| Angle between velocity vectors | 177° |
| Geographic position | 40.3°S, 131.7°W |
| Height | 519 km |
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