| Primary satellite | Secondary satellite |
| Name | Cosmos 158 Rocket | IRIDIUM 158 |
| Spacetrack catalog number | 2802 | 43571 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Apr 18 09:24 | 2021 Apr 18 13:26 |
| Time of closest approach (UTC) | 2021 Mar 04 20:42:20.936 |
| Minimum distance | 18.464 km |
| Height difference | 5.258 km |
| Relative speed | 2.725 km/s |
| Angle between velocity vectors | 21° |
| Geographic position | 52.9°N, 154.7°W |
| Height | 782 km |
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