| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34388 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Jun 02 13:06 | 2023 Jun 02 09:19 |
| Time of closest approach (UTC) | 2023 Apr 08 22:38:10.070 |
| Minimum distance | 9.417 km |
| Height difference | -2.023 km |
| Relative speed | 14.886 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 38.3°N, 81.9°E |
| Height | 770 km |
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