| Primary satellite | Secondary satellite |
| Name | Cosmos 2251 Rocket | DMSP 5D-2 F13 DEB |
| Spacetrack catalog number | 22676 | 42273 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 17 12:10 | 2021 Jan 16 18:57 |
| Time of closest approach (UTC) | 2020 Nov 29 00:49:19.662 |
| Minimum distance | 349.113 km |
| Height difference | -1.250 km |
| Relative speed | 5.905 km/s |
| Angle between velocity vectors | 47° |
| Geographic position | 56.0°S, 69.9°W |
| Height | 813 km |
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