| Primary satellite | Secondary satellite |
| Name | Cosmos 1025 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 10974 | 37501 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 17:18 | 2021 Jan 16 18:07 |
| Time of closest approach (UTC) | 2020 Dec 05 22:43:39.213 |
| Minimum distance | 55.375 km |
| Height difference | 0.058 km |
| Relative speed | 13.473 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 63.7°N, 7.7°E |
| Height | 609 km |
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