| Primary satellite | Secondary satellite |
| Name | SJ-11-01 | COSMOS 2251 DEB |
| Spacetrack catalog number | 36088 | 34746 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 24 09:51 | 2021 Jan 24 05:58 |
| Time of closest approach (UTC) | 2020 Nov 28 04:36:45.246 |
| Minimum distance | 31.250 km |
| Height difference | 3.761 km |
| Relative speed | 14.971 km/s |
| Angle between velocity vectors | 172° |
| Geographic position | 0.8°S, 136.4°W |
| Height | 694 km |
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