| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | HAIYANG 1D |
| Spacetrack catalog number | 35459 | 45721 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 16:06 | 2024 Dec 23 03:18 |
| Time of closest approach (UTC) | 2024 Dec 26 00:48:16.412 |
| Minimum distance | 1.856 km |
| Height difference | -1.218 km |
| Relative speed | 14.891 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 0.6°S, 13.3°E |
| Height | 781 km |
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