| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | deb Kosmos-1275 |
| Spacetrack catalog number | 15755 | 18592 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 06 13:42 | 2021 Mar 05 18:57 |
| Time of closest approach (UTC) | 2021 Jan 26 14:42:35.069 |
| Minimum distance | 17.572 km |
| Height difference | -1.690 km |
| Relative speed | 11.910 km/s |
| Angle between velocity vectors | 107° |
| Geographic position | 66.9°S, 63.5°E |
| Height | 861 km |
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