| Primary satellite | Secondary satellite |
| Name | Cosmos 923 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 10121 | 30838 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jul 12 12:37 | 2025 Jul 13 04:04 |
| Time of closest approach (UTC) | 2025 Jun 18 09:21:59.590 |
| Minimum distance | 19.138 km |
| Height difference | 1.818 km |
| Relative speed | 11.275 km/s |
| Angle between velocity vectors | 98° |
| Geographic position | 72.7°N, 125.6°W |
| Height | 774 km |
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