| Primary satellite | Secondary satellite |
| Name | SJ-11-01 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36088 | 35986 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 18:44 | 2021 Jan 25 09:23 |
| Time of closest approach (UTC) | 2020 Nov 29 00:23:39.545 |
| Minimum distance | 18.058 km |
| Height difference | -0.415 km |
| Relative speed | 14.975 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 9.3°N, 74.6°W |
| Height | 695 km |
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