| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 35459 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2025 Jul 17 10:59 | 2025 Jul 16 00:03 |
| Time of closest approach (UTC) | 2024 Aug 08 15:44:12.613 |
| Minimum distance | 787.523 km |
| Height difference | 10.445 km |
| Relative speed | 14.708 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 46.6°S, 157.6°E |
| Height | 782 km |
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