| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 33837 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Apr 01 19:57 | 2023 Apr 01 11:31 |
| Time of closest approach (UTC) | 2023 Feb 08 20:40:18.848 |
| Minimum distance | 28.617 km |
| Height difference | -3.453 km |
| Relative speed | 14.862 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 45.4°N, 81.9°W |
| Height | 772 km |
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