| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 | DMSP 5D-2 F13 DEB |
| Spacetrack catalog number | 23087 | 40464 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 06 09:12 | 2021 Mar 06 02:35 |
| Time of closest approach (UTC) | 2021 Jan 20 17:05:43.294 |
| Minimum distance | 29.186 km |
| Height difference | -2.792 km |
| Relative speed | 14.759 km/s |
| Angle between velocity vectors | 167° |
| Geographic position | 39.3°S, 47.0°W |
| Height | 867 km |
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