| Primary satellite | Secondary satellite |
| Name | NOAA 15 | COSMOS 2251 DEB |
| Spacetrack catalog number | 25338 | 35584 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Feb 27 20:08 | 2021 Feb 27 20:10 |
| Time of closest approach (UTC) | 2021 Jan 19 12:37:49.777 |
| Minimum distance | 109.204 km |
| Height difference | 2.506 km |
| Relative speed | 13.272 km/s |
| Angle between velocity vectors | 126° |
| Geographic position | 73.3°S, 109.9°W |
| Height | 833 km |
|