| 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 21 07:06 | 2023 Mar 18 19:57 |
| Time of closest approach (UTC) | 2023 Jan 31 00:11:16.846 |
| Minimum distance | 531.043 km |
| Height difference | -0.943 km |
| Relative speed | 6.871 km/s |
| Angle between velocity vectors | 55° |
| Geographic position | 48.3°S, 116.7°W |
| Height | 783 km |
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