| Primary satellite | Secondary satellite |
| Name | Cosmos 1302 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 12792 | 34331 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Mar 08 04:54 | 2021 Mar 08 12:11 |
| Time of closest approach (UTC) | 2021 Jan 26 02:22:12.237 |
| Minimum distance | 77.413 km |
| Height difference | -2.557 km |
| Relative speed | 10.613 km/s |
| Angle between velocity vectors | 91° |
| Geographic position | 66.8°N, 104.4°E |
| Height | 769 km |
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