| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34588 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 22:03 | 2024 Dec 22 17:07 |
| Time of closest approach (UTC) | 2024 Dec 26 19:33:21.322 |
| Minimum distance | 3.627 km |
| Height difference | -0.488 km |
| Relative speed | 12.928 km/s |
| Angle between velocity vectors | 120° |
| Geographic position | 74.1°N, 103.4°W |
| Height | 774 km |
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