| Primary satellite | Secondary satellite |
| Name | NOSS 3-2 (C) | Cosmos 2173 Rocket |
| Spacetrack catalog number | 28097 | 21797 |
| Radar cross section | | large |
| Epoch of two-line elements (UTC) | 2021 Jan 09 18:12 | 2021 Jan 22 11:47 |
| Time of closest approach (UTC) | 2020 Nov 29 21:33:58.981 |
| Minimum distance | 31.743 km |
| Height difference | -0.463 km |
| Relative speed | 12.949 km/s |
| Angle between velocity vectors | 121° |
| Geographic position | 52.2°N, 17.1°W |
| Height | 957 km |
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