| Primary satellite | Secondary satellite |
| Name | Cosmos 1331 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 13028 | 40808 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 04 10:09 | 2021 Mar 04 00:43 |
| Time of closest approach (UTC) | 2021 Jan 21 13:02:42.851 |
| Minimum distance | 37.492 km |
| Height difference | 3.853 km |
| Relative speed | 13.270 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 53.5°S, 147.8°E |
| Height | 777 km |
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