| Primary satellite | Secondary satellite |
| Name | SJ-11-01 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36088 | 34130 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 18:44 | 2021 Jan 25 11:19 |
| Time of closest approach (UTC) | 2020 Nov 29 04:58:14.965 |
| Minimum distance | 12.162 km |
| Height difference | 8.004 km |
| Relative speed | 14.637 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 67.7°S, 122.1°W |
| Height | 709 km |
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