| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 2251 DEB |
| Spacetrack catalog number | 27386 | 35989 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Nov 28 20:46 | 2023 Nov 27 00:25 |
| Time of closest approach (UTC) | 2023 Oct 02 09:13:56.658 |
| Minimum distance | 12.534 km |
| Height difference | -1.154 km |
| Relative speed | 9.506 km/s |
| Angle between velocity vectors | 79° |
| Geographic position | 70.2°S, 115.3°E |
| Height | 789 km |
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