| Primary satellite | Secondary satellite |
| Name | Nadezhda 4 Rocket | NIMBUS 2 DEB |
| Spacetrack catalog number | 23180 | 28612 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 13:11 | 2021 Jan 20 10:28 |
| Time of closest approach (UTC) | 2020 Nov 29 12:38:23.489 |
| Minimum distance | 127.152 km |
| Height difference | 3.257 km |
| Relative speed | 5.810 km/s |
| Angle between velocity vectors | 47° |
| Geographic position | 66.9°N, 22.8°W |
| Height | 1005 km |
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