| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 40218 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Nov 17 20:47 | 2025 Nov 16 04:55 |
| Time of closest approach (UTC) | 2025 Oct 15 14:37:40.787 |
| Minimum distance | 106.487 km |
| Height difference | 3.275 km |
| Relative speed | 12.703 km/s |
| Angle between velocity vectors | 117° |
| Geographic position | 74.7°S, 29.4°E |
| Height | 789 km |
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