| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | CZ-4 DEB |
| Spacetrack catalog number | 22676 | 27492 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 11:02 | 2021 Jan 24 22:54 |
| Time of closest approach (UTC) | 2020 Dec 01 02:59:40.026 |
| Minimum distance | 111.359 km |
| Height difference | -5.872 km |
| Relative speed | 7.813 km/s |
| Angle between velocity vectors | 63° |
| Geographic position | 65.6°S, 122.3°W |
| Height | 816 km |
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