| Primary satellite | Secondary satellite |
| Name | SJ-11-01 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36088 | 34010 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 24 09:51 | 2021 Jan 24 01:28 |
| Time of closest approach (UTC) | 2020 Dec 07 20:50:41.207 |
| Minimum distance | 36.638 km |
| Height difference | -8.308 km |
| Relative speed | 14.271 km/s |
| Angle between velocity vectors | 144° |
| Geographic position | 72.5°N, 46.5°W |
| Height | 714 km |
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