| Primary satellite | Secondary satellite |
| Name | MOS 1 | deb Kosmos-1275 |
| Spacetrack catalog number | 17527 | 17635 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 21:28 | 2021 Jan 17 20:20 |
| Time of closest approach (UTC) | 2020 Dec 06 00:29:40.197 |
| Minimum distance | 2.654 km |
| Height difference | -1.973 km |
| Relative speed | 14.800 km/s |
| Angle between velocity vectors | 178° |
| Geographic position | 9.6°N, 123.2°E |
| Height | 891 km |
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