| Primary satellite | Secondary satellite |
| Name | Envisat | Cosmos 990 |
| Spacetrack catalog number | 27386 | 10676 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2026 Jan 24 11:14 | 2026 Jan 24 10:40 |
| Time of closest approach (UTC) | 2025 Dec 19 13:33:49.742 |
| Minimum distance | 7.440 km |
| Height difference | 0.136 km |
| Relative speed | 14.902 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 18.8°S, 15.1°E |
| Height | 770 km |
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