| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 35287 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:47 | 2025 Nov 17 17:46 |
| Time of closest approach (UTC) | 2025 Oct 18 23:34:17.366 |
| Minimum distance | 0.651 km |
| Height difference | -0.086 km |
| Relative speed | 13.719 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 73.7°N, 72.9°E |
| Height | 774 km |
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