| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | DMSP B5D2-8 |
| Spacetrack catalog number | 23088 | 23533 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2021 Jan 15 19:24 | 2021 Jan 15 19:09 |
| Time of closest approach (UTC) | 2020 Dec 02 20:57:09.887 |
| Minimum distance | 23.843 km |
| Height difference | -0.805 km |
| Relative speed | 14.720 km/s |
| Angle between velocity vectors | 165° |
| Geographic position | 43.3°S, 40.1°W |
| Height | 861 km |
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