| Primary satellite | Secondary satellite |
| Name | SENTINEL 1B | COSMOS 2251 DEB |
| Spacetrack catalog number | 41456 | 40223 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 19:20 | 2025 Nov 15 23:03 |
| Time of closest approach (UTC) | 2025 Oct 17 11:38:24.941 |
| Minimum distance | 547.340 km |
| Height difference | -9.975 km |
| Relative speed | 13.926 km/s |
| Angle between velocity vectors | 134° |
| Geographic position | 68.4°N, 114.9°E |
| Height | 597 km |
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