| Primary satellite | Secondary satellite |
| Name | SJ-12 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36596 | 34577 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 May 15 04:27 | 2025 May 14 17:26 |
| Time of closest approach (UTC) | 2025 May 01 05:46:30.022 |
| Minimum distance | 127.684 km |
| Height difference | -6.280 km |
| Relative speed | 14.900 km/s |
| Angle between velocity vectors | 157° |
| Geographic position | 63.7°N, 15.4°E |
| Height | 537 km |
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