| Primary satellite | Secondary satellite |
| Name | Cosmos 2151 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 21423 | 35095 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 04:12 | 2021 Jan 10 23:14 |
| Time of closest approach (UTC) | 2020 Dec 02 04:10:24.277 |
| Minimum distance | 2.504 km |
| Height difference | -2.483 km |
| Relative speed | 14.778 km/s |
| Angle between velocity vectors | 154° |
| Geographic position | 81.6°N, 156.0°W |
| Height | 633 km |
|