| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23088 | 35122 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jun 20 12:21 | 2025 Jun 18 08:11 |
| Time of closest approach (UTC) | 2025 May 20 22:50:47.007 |
| Minimum distance | 11.282 km |
| Height difference | 2.558 km |
| Relative speed | 14.571 km/s |
| Angle between velocity vectors | 158° |
| Geographic position | 58.7°S, 41.6°W |
| Height | 866 km |
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