| Primary satellite | Secondary satellite |
| Name | Envisat | COSMOS 1818 DEB |
| Spacetrack catalog number | 27386 | 36941 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2023 Mar 28 12:40 | 2023 Mar 27 04:33 |
| Time of closest approach (UTC) | 2023 Jan 31 00:10:25.065 |
| Minimum distance | 30.028 km |
| Height difference | -0.652 km |
| Relative speed | 6.847 km/s |
| Angle between velocity vectors | 55° |
| Geographic position | 50.5°S, 115.8°W |
| Height | 783 km |
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