| Primary satellite | Secondary satellite |
| Name | Cosmos 1655 Rocket | deb Kosmos-397 |
| Spacetrack catalog number | 15752 | 14446 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 22 13:19 | 2021 Jan 22 04:17 |
| Time of closest approach (UTC) | 2020 Nov 28 05:41:49.750 |
| Minimum distance | 106.957 km |
| Height difference | 7.941 km |
| Relative speed | 13.082 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 51.8°S, 65.0°W |
| Height | 1005 km |
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