| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 22676 | 33835 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 12:10 | 2021 Jan 17 12:25 |
| Time of closest approach (UTC) | 2020 Nov 30 00:03:40.720 |
| Minimum distance | 71.408 km |
| Height difference | 0.130 km |
| Relative speed | 9.042 km/s |
| Angle between velocity vectors | 75° |
| Geographic position | 70.1°S, 164.7°W |
| Height | 816 km |
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