| Primary satellite | Secondary satellite |
| Name | Cosmos 1782 Rocket | IRIDIUM 33 DEB |
| Spacetrack catalog number | 16987 | 34535 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 21 21:11 | 2021 Jan 22 04:49 |
| Time of closest approach (UTC) | 2020 Dec 04 06:41:17.112 |
| Minimum distance | 86.383 km |
| Height difference | -2.359 km |
| Relative speed | 14.989 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 31.2°S, 26.2°E |
| Height | 629 km |
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