| Primary satellite | Secondary satellite |
| Name | SR | COSMOS 2251 DEB |
| Spacetrack catalog number | 46 | 37957 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Mar 08 09:59 | 2021 Mar 07 05:13 |
| Time of closest approach (UTC) | 2021 Jan 26 01:58:33.512 |
| Minimum distance | 61.359 km |
| Height difference | 2.522 km |
| Relative speed | 14.300 km/s |
| Angle between velocity vectors | 141° |
| Geographic position | 0.5°N, 9.9°E |
| Height | 604 km |
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