| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | HAIYANG 1C |
| Spacetrack catalog number | 37530 | 43609 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 19 01:13 | 2024 Dec 23 04:38 |
| Time of closest approach (UTC) | 2024 Dec 28 09:28:31.343 |
| Minimum distance | 3.929 km |
| Height difference | 3.928 km |
| Relative speed | 14.901 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 18.1°S, 8.3°E |
| Height | 777 km |
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