| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | FENGYUN 1C DEB |
| Spacetrack catalog number | 23088 | 40690 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 19:24 | 2021 Jan 11 15:27 |
| Time of closest approach (UTC) | 2020 Dec 06 16:08:02.172 |
| Minimum distance | 12.875 km |
| Height difference | 1.237 km |
| Relative speed | 14.775 km/s |
| Angle between velocity vectors | 166° |
| Geographic position | 46.9°N, 19.8°W |
| Height | 854 km |
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