| Primary satellite | Secondary satellite |
| Name | YUNHAI-1 03 | Cosmos 1538 |
| Spacetrack catalog number | 53877 | 14759 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 09:47 | 2024 Dec 23 00:46 |
| Time of closest approach (UTC) | 2024 Dec 28 18:00:29.893 |
| Minimum distance | 2.963 km |
| Height difference | 1.128 km |
| Relative speed | 14.887 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 8.9°S, 169.2°E |
| Height | 785 km |
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