| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 33837 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 21 20:09 | 2023 Mar 21 05:04 |
| Time of closest approach (UTC) | 2023 Feb 08 20:40:32.446 |
| Minimum distance | 32.351 km |
| Height difference | -3.309 km |
| Relative speed | 14.862 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 45.6°N, 82.0°W |
| Height | 772 km |
|