| Primary satellite | Secondary satellite |
| Name | AO-Echo | Cosmos 2251 Rocket |
| Spacetrack catalog number | 28375 | 22676 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Oct 03 09:55 | 2024 Oct 03 13:20 |
| Time of closest approach (UTC) | 2024 Sep 21 17:12:41.502 |
| Minimum distance | 3.263 km |
| Height difference | -2.046 km |
| Relative speed | 14.607 km/s |
| Angle between velocity vectors | 156° |
| Geographic position | 68.4°N, 154.0°E |
| Height | 778 km |
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