| Primary satellite | Secondary satellite |
| Name | NOAA 15 | COSMOS 2251 DEB |
| Spacetrack catalog number | 25338 | 35830 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 27 20:08 | 2021 Feb 27 00:44 |
| Time of closest approach (UTC) | 2021 Jan 18 10:23:58.093 |
| Minimum distance | 3.050 km |
| Height difference | -1.883 km |
| Relative speed | 14.866 km/s |
| Angle between velocity vectors | 169° |
| Geographic position | 47.5°N, 124.6°E |
| Height | 808 km |
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