| Primary satellite | Secondary satellite |
| Name | Cosmos 407 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 5175 | 38055 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 24 18:47 | 2021 Feb 24 01:54 |
| Time of closest approach (UTC) | 2021 Jan 19 03:22:26.352 |
| Minimum distance | 13.647 km |
| Height difference | -2.769 km |
| Relative speed | 10.329 km/s |
| Angle between velocity vectors | 88° |
| Geographic position | 67.7°N, 78.4°W |
| Height | 778 km |
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