| Primary satellite | Secondary satellite |
| Name | Cosmos 923 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 10121 | 30547 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jul 12 12:37 | 2025 Jul 13 11:55 |
| Time of closest approach (UTC) | 2025 Jun 17 14:51:17.326 |
| Minimum distance | 1.441 km |
| Height difference | 1.162 km |
| Relative speed | 14.769 km/s |
| Angle between velocity vectors | 163° |
| Geographic position | 63.1°N, 74.1°E |
| Height | 779 km |
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