| Primary satellite | Secondary satellite |
| Name | SJ-12 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36596 | 34410 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 May 15 04:27 | 2025 May 13 15:52 |
| Time of closest approach (UTC) | 2025 May 04 01:07:08.094 |
| Minimum distance | 49.604 km |
| Height difference | -0.574 km |
| Relative speed | 13.180 km/s |
| Angle between velocity vectors | 121° |
| Geographic position | 74.2°S, 40.7°E |
| Height | 564 km |
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