| Primary satellite | Secondary satellite |
| Name | Envisat | Cosmos 1023 |
| Spacetrack catalog number | 27386 | 10961 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 05 21:06 | 2024 Dec 05 16:30 |
| Time of closest approach (UTC) | 2024 Nov 12 17:33:22.755 |
| Minimum distance | 2.262 km |
| Height difference | -2.250 km |
| Relative speed | 14.741 km/s |
| Angle between velocity vectors | 161° |
| Geographic position | 63.9°N, 155.4°E |
| Height | 773 km |
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