| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34754 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 May 29 05:07 | 2023 May 28 18:46 |
| Time of closest approach (UTC) | 2023 Apr 01 00:37:51.004 |
| Minimum distance | 18.535 km |
| Height difference | -3.440 km |
| Relative speed | 14.888 km/s |
| Angle between velocity vectors | 171° |
| Geographic position | 31.6°S, 40.6°E |
| Height | 775 km |
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