| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23088 | 31003 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jun 20 12:21 | 2025 Jun 18 03:52 |
| Time of closest approach (UTC) | 2025 May 21 00:40:49.271 |
| Minimum distance | 148.082 km |
| Height difference | 1.193 km |
| Relative speed | 12.188 km/s |
| Angle between velocity vectors | 111° |
| Geographic position | 70.8°S, 2.8°W |
| Height | 868 km |
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