| Primary satellite | Secondary satellite |
| Name | STRAND 1 | IRIDIUM 126 |
| Spacetrack catalog number | 39090 | 42809 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2021 Mar 01 09:54 | 2021 Mar 01 02:17 |
| Time of closest approach (UTC) | 2021 Jan 19 10:28:20.631 |
| Minimum distance | 26.766 km |
| Height difference | 4.160 km |
| Relative speed | 13.319 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 81.5°N, 151.1°W |
| Height | 788 km |
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