| Primary satellite | Secondary satellite |
| Name | Cosmos 1091 Rocket | EO 1 Delta rocket |
| Spacetrack catalog number | 11321 | 26622 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2024 Dec 23 10:22 | 2024 Dec 22 14:21 |
| Time of closest approach (UTC) | 2024 Dec 26 02:07:25.198 |
| Minimum distance | 4.790 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 | 1017 km |
|