| Primary satellite | Secondary satellite |
| Name | COSMOS 2251 DEB | deb Delta 89 |
| Spacetrack catalog number | 35959 | 8542 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2024 Dec 22 15:36 | 2024 Dec 22 09:51 |
| Time of closest approach (UTC) | 2024 Dec 27 12:21:37.151 |
| Minimum distance | 3.038 km |
| Height difference | 1.951 km |
| Relative speed | 9.521 km/s |
| Angle between velocity vectors | 79° |
| Geographic position | 70.4°S, 175.7°W |
| Height | 817 km |
|