| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | PRISMA (TANGO) |
| Spacetrack catalog number | 22676 | 36827 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 25 11:02 | 2021 Jan 25 12:14 |
| Time of closest approach (UTC) | 2020 Dec 03 17:42:28.022 |
| Minimum distance | 18.141 km |
| Height difference | 2.008 km |
| Relative speed | 13.691 km/s |
| Angle between velocity vectors | 133° |
| Geographic position | 73.8°N, 150.3°E |
| Height | 777 km |
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