| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Feng Yun 1B |
| Spacetrack catalog number | 35031 | 23254 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 21 05:55 | 2024 Dec 21 14:17 |
| Time of closest approach (UTC) | 2024 Dec 24 11:58:33.645 |
| Minimum distance | 1.769 km |
| Height difference | 1.332 km |
| Relative speed | 13.852 km/s |
| Angle between velocity vectors | 137° |
| Geographic position | 73.5°S, 170.6°E |
| Height | 796 km |
|