| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 35645 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:47 | 2025 Nov 17 05:39 |
| Time of closest approach (UTC) | 2025 Oct 15 14:25:52.754 |
| Minimum distance | 77.710 km |
| Height difference | 7.592 km |
| Relative speed | 6.324 km/s |
| Angle between velocity vectors | 50° |
| Geographic position | 59.7°S, 165.5°E |
| Height | 784 km |
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