| 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 23 21:48 | 2021 Jan 21 04:51 |
| Time of closest approach (UTC) | 2020 Dec 04 11:34:09.538 |
| Minimum distance | 8.779 km |
| Height difference | -6.912 km |
| Relative speed | 15.011 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 26.1°S, 46.5°W |
| Height | 626 km |
|