| Primary satellite | Secondary satellite |
| Name | SJ-11-01 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36088 | 35726 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 25 18:44 | 2021 Jan 24 17:27 |
| Time of closest approach (UTC) | 2020 Dec 07 17:41:37.398 |
| Minimum distance | 49.206 km |
| Height difference | -5.723 km |
| Relative speed | 12.371 km/s |
| Angle between velocity vectors | 111° |
| Geographic position | 73.6°N, 124.7°W |
| Height | 713 km |
|