| 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 15 17:24 |
| Time of closest approach (UTC) | 2020 Nov 29 21:34:00.115 |
| Minimum distance | 23.720 km |
| Height difference | -1.057 km |
| Relative speed | 12.949 km/s |
| Angle between velocity vectors | 121° |
| Geographic position | 52.3°N, 17.0°W |
| Height | 957 km |
|