| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34307 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:47 | 2025 Nov 17 13:10 |
| Time of closest approach (UTC) | 2025 Oct 17 13:24:36.551 |
| Minimum distance | 52.089 km |
| Height difference | 2.113 km |
| Relative speed | 14.823 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 64.1°S, 32.8°E |
| Height | 787 km |
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