| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34011 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 21 13:44 | 2023 Mar 21 11:23 |
| Time of closest approach (UTC) | 2023 Feb 07 03:15:00.707 |
| Minimum distance | 1004.611 km |
| Height difference | -8.820 km |
| Relative speed | 9.141 km/s |
| Angle between velocity vectors | 75° |
| Geographic position | 64.6°N, 25.5°E |
| Height | 776 km |
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