| Primary satellite | Secondary satellite |
| Name | STRAND 1 | IRIDIUM 107 |
| Spacetrack catalog number | 39090 | 42960 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2021 Mar 01 09:54 | 2021 Mar 01 08:55 |
| Time of closest approach (UTC) | 2021 Jan 22 12:54:53.566 |
| Minimum distance | 9.489 km |
| Height difference | 2.956 km |
| Relative speed | 11.355 km/s |
| Angle between velocity vectors | 99° |
| Geographic position | 81.3°S, 18.0°E |
| Height | 802 km |
|