| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23088 | 30737 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jun 20 12:21 | 2025 Jun 20 10:21 |
| Time of closest approach (UTC) | 2025 May 20 19:43:42.666 |
| Minimum distance | 14.765 km |
| Height difference | 3.628 km |
| Relative speed | 14.645 km/s |
| Angle between velocity vectors | 162° |
| Geographic position | 52.8°S, 124.5°E |
| Height | 860 km |
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