| Primary satellite | Secondary satellite |
| Name | Cosmos 1782 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 16987 | 35925 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 21 21:11 | 2021 Jan 21 04:51 |
| Time of closest approach (UTC) | 2020 Dec 04 09:56:59.405 |
| Minimum distance | 12.686 km |
| Height difference | -7.048 km |
| Relative speed | 15.011 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 26.1°S, 22.1°W |
| Height | 626 km |
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