| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 34962 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 27 05:02 | 2023 Mar 27 03:30 |
| Time of closest approach (UTC) | 2023 Jan 31 03:07:56.836 |
| Minimum distance | 440.489 km |
| Height difference | -0.343 km |
| Relative speed | 4.750 km/s |
| Angle between velocity vectors | 37° |
| Geographic position | 46.8°S, 1.0°E |
| Height | 781 km |
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