| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 33973 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 21 07:06 | 2023 Mar 21 07:04 |
| Time of closest approach (UTC) | 2023 Jan 30 06:24:12.937 |
| Minimum distance | 99.432 km |
| Height difference | -1.651 km |
| Relative speed | 12.370 km/s |
| Angle between velocity vectors | 112° |
| Geographic position | 74.5°N, 109.6°E |
| Height | 778 km |
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