| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 36074 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jul 13 11:52 | 2025 Jul 12 14:55 |
| Time of closest approach (UTC) | 2025 Jun 19 05:50:57.976 |
| Minimum distance | 5.157 km |
| Height difference | -2.529 km |
| Relative speed | 14.895 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 22.2°S, 53.1°W |
| Height | 770 km |
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