| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 21423 | 31042 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 04:12 | 2021 Jan 14 04:03 |
| Time of closest approach (UTC) | 2020 Dec 03 11:54:28.611 |
| Minimum distance | 10.382 km |
| Height difference | -4.602 km |
| Relative speed | 15.057 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 65.5°S, 49.2°W |
| Height | 663 km |
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