| Primary satellite | Secondary satellite |
| Name | Cosmos 1331 Rocket | IRIDIUM 136 |
| Spacetrack catalog number | 13028 | 42962 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Mar 06 08:53 | 2021 Mar 06 12:04 |
| Time of closest approach (UTC) | 2021 Jan 23 10:28:46.472 |
| Minimum distance | 43.921 km |
| Height difference | 5.018 km |
| Relative speed | 1.735 km/s |
| Angle between velocity vectors | 13° |
| Geographic position | 21.8°N, 149.9°W |
| Height | 777 km |
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