| Primary satellite | Secondary satellite |
| Name | Cosmos 2278 Rocket | deb Delta 139 |
| Spacetrack catalog number | 23088 | 12256 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 19:24 | 2021 Jan 15 22:52 |
| Time of closest approach (UTC) | 2020 Dec 06 10:30:10.454 |
| Minimum distance | 18.845 km |
| Height difference | -0.727 km |
| Relative speed | 14.817 km/s |
| Angle between velocity vectors | 170° |
| Geographic position | 14.2°N, 88.2°W |
| Height | 842 km |
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