| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | DMSP 5528 |
| Spacetrack catalog number | 23088 | 5903 |
| Radar cross section | large | medium |
| Epoch of two-line elements (UTC) | 2021 Jan 15 19:24 | 2021 Jan 15 17:49 |
| Time of closest approach (UTC) | 2020 Dec 03 14:12:41.084 |
| Minimum distance | 123.628 km |
| Height difference | 2.835 km |
| Relative speed | 8.380 km/s |
| Angle between velocity vectors | 69° |
| Geographic position | 64.6°S, 174.0°E |
| Height | 865 km |
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