| Primary satellite | Secondary satellite |
| Name | AO-91 | COSMOS 2251 DEB |
| Spacetrack catalog number | 43017 | 34571 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2023 Jan 26 14:39 | 2023 Jan 25 05:50 |
| Time of closest approach (UTC) | 2022 Dec 02 11:13:04.107 |
| Minimum distance | 49.197 km |
| Height difference | -7.945 km |
| Relative speed | 14.843 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 34.9°S, 158.8°E |
| Height | 766 km |
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