| Primary satellite | Secondary satellite |
| Name | Cosmos 1656 | SENTINEL 3A |
| Spacetrack catalog number | 15755 | 41335 |
| Radar cross section | large | large |
| Epoch of two-line elements (UTC) | 2023 Mar 20 13:16 | 2023 Mar 20 15:39 |
| Time of closest approach (UTC) | 2023 Feb 03 07:01:38.239 |
| Minimum distance | 292.442 km |
| Height difference | 4.999 km |
| Relative speed | 12.637 km/s |
| Angle between velocity vectors | 116° |
| Geographic position | 71.0°N, 168.4°W |
| Height | 811 km |
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