| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | PRISMA |
| Spacetrack catalog number | 21423 | 44072 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 15 04:12 | 2021 Jan 15 04:37 |
| Time of closest approach (UTC) | 2020 Nov 30 18:05:17.136 |
| Minimum distance | 10.573 km |
| Height difference | -0.377 km |
| Relative speed | 15.079 km/s |
| Angle between velocity vectors | 174° |
| Geographic position | 82.1°N, 10.5°W |
| Height | 633 km |
|