| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | deb Chang Zheng 4 |
| Spacetrack catalog number | 22676 | 20850 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 23 03:47 | 2021 Jan 22 22:18 |
| Time of closest approach (UTC) | 2020 Nov 30 15:28:03.184 |
| Minimum distance | 70.089 km |
| Height difference | 2.491 km |
| Relative speed | 3.637 km/s |
| Angle between velocity vectors | 28° |
| Geographic position | 28.7°S, 81.8°E |
| Height | 799 km |
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