| Primary satellite | Secondary satellite |
| Name | Cosmos 1975 | IRIDIUM 33 DEB |
| Spacetrack catalog number | 19573 | 40997 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 23 10:26 | 2021 Jan 22 21:08 |
| Time of closest approach (UTC) | 2020 Dec 08 18:18:21.058 |
| Minimum distance | 323.416 km |
| Height difference | -8.898 km |
| Relative speed | 15.106 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 21.2°N, 154.3°W |
| Height | 555 km |
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