| Primary satellite | Secondary satellite |
| Name | Cosmos 2181 Rocket | deb Kosmos-1275 |
| Spacetrack catalog number | 21903 | 12697 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Apr 21 00:58 | 2021 Apr 20 17:59 |
| Time of closest approach (UTC) | 2021 Mar 01 05:16:05.434 |
| Minimum distance | 8.731 km |
| Height difference | -0.788 km |
| Relative speed | 14.186 km/s |
| Angle between velocity vectors | 151° |
| Geographic position | 60.5°N, 169.4°W |
| Height | 1024 km |
|