| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | deb Kosmos-375 |
| Spacetrack catalog number | 15755 | 4712 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 07 20:07 | 2021 Mar 07 18:58 |
| Time of closest approach (UTC) | 2021 Jan 24 18:30:15.054 |
| Minimum distance | 111.169 km |
| Height difference | -0.228 km |
| Relative speed | 12.394 km/s |
| Angle between velocity vectors | 112° |
| Geographic position | 44.7°S, 95.1°W |
| Height | 829 km |
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