| 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 21 07:06 | 2023 Mar 21 04:12 |
| Time of closest approach (UTC) | 2023 Jan 31 03:08:50.414 |
| Minimum distance | 75.498 km |
| Height difference | -0.445 km |
| Relative speed | 4.726 km/s |
| Angle between velocity vectors | 37° |
| Geographic position | 48.9°S, 0.1°E |
| Height | 782 km |
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