| 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 22 08:14:56.276 |
| Minimum distance | 1.965 km |
| Height difference | 0.897 km |
| Relative speed | 14.604 km/s |
| Angle between velocity vectors | 160° |
| Geographic position | 57.4°S, 96.7°E |
| Height | 872 km |
|