| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23088 | 31252 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jun 20 12:21 | 2025 Jun 19 20:44 |
| Time of closest approach (UTC) | 2025 May 17 20:06:12.680 |
| Minimum distance | 39.819 km |
| Height difference | 1.695 km |
| Relative speed | 14.676 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 42.6°S, 6.8°W |
| Height | 861 km |
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