| 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 23 10:26 | 2021 Jan 23 08:51 |
| Time of closest approach (UTC) | 2020 Dec 04 11:06:46.404 |
| Minimum distance | 582.781 km |
| Height difference | 2.872 km |
| Relative speed | 14.485 km/s |
| Angle between velocity vectors | 145° |
| Geographic position | 39.4°N, 132.9°E |
| Height | 567 km |
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