| Primary satellite | Secondary satellite |
| Name | EO 1 Delta rocket | Cosmos 1091 Rocket |
| Spacetrack catalog number | 26622 | 11321 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 22 14:21 | 2024 Dec 22 22:25 |
| Time of closest approach (UTC) | 2024 Dec 26 02:07:25.198 |
| Minimum distance | 4.794 km |
| Height difference | -4.749 km |
| Relative speed | 7.781 km/s |
| Angle between velocity vectors | 63° |
| Geographic position | 78.1°S, 135.9°W |
| Height | 1022 km |
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