| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 | FENGYUN 1C DEB |
| Spacetrack catalog number | 23087 | 29850 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 May 22 11:45 | 2025 May 22 15:11 |
| Time of closest approach (UTC) | 2024 Jul 19 10:05:17.047 |
| Minimum distance | 1622.506 km |
| Height difference | 118.925 km |
| Relative speed | 14.687 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 68.5°N, 17.6°E |
| Height | 859 km |
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