| Primary satellite | Secondary satellite |
| Name | AO-91 | IRIDIUM 125 |
| Spacetrack catalog number | 43017 | 42964 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2021 Mar 06 11:05 | 2021 Mar 06 11:54 |
| Time of closest approach (UTC) | 2021 Jan 20 04:43:34.986 |
| Minimum distance | 32.800 km |
| Height difference | 1.384 km |
| Relative speed | 14.587 km/s |
| Angle between velocity vectors | 159° |
| Geographic position | 77.7°S, 137.6°E |
| Height | 803 km |
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