| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 | FENGYUN 1C DEB |
| Spacetrack catalog number | 23087 | 30501 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 04 09:40 | 2021 Mar 04 13:35 |
| Time of closest approach (UTC) | 2021 Jan 20 05:14:40.816 |
| Minimum distance | 4.251 km |
| Height difference | 2.629 km |
| Relative speed | 14.705 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 46.2°S, 136.9°E |
| Height | 869 km |
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