| Primary satellite | Secondary satellite |
| Name | Cosmos 1975 | COSMOS 2251 DEB |
| Spacetrack catalog number | 19573 | 37962 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 15 15:44 | 2021 Jan 13 23:45 |
| Time of closest approach (UTC) | 2020 Dec 04 11:05:52.629 |
| Minimum distance | 300.037 km |
| Height difference | 0.822 km |
| Relative speed | 14.477 km/s |
| Angle between velocity vectors | 145° |
| Geographic position | 43.3°N, 132.2°E |
| Height | 568 km |
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