| Primary satellite | Secondary satellite |
| Name | SPOT 5 | IRIDIUM 173 |
| Spacetrack catalog number | 27421 | 43925 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 17 18:49 | 2021 Jan 17 17:08 |
| Time of closest approach (UTC) | 2020 Dec 04 02:47:54.871 |
| Minimum distance | 64.213 km |
| Height difference | 0.289 km |
| Relative speed | 8.708 km/s |
| Angle between velocity vectors | 72° |
| Geographic position | 79.7°S, 15.5°W |
| Height | 804 km |
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