| Primary satellite | Secondary satellite |
| Name | ITUPSAT 1 | COSMOS 2251 DEB |
| Spacetrack catalog number | 35935 | 36451 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 Dec 14 07:10 | 2025 Dec 08 10:10 |
| Time of closest approach (UTC) | 2025 Nov 13 22:17:48.634 |
| Minimum distance | 3.531 km |
| Height difference | 3.500 km |
| Relative speed | 14.973 km/s |
| Angle between velocity vectors | 168° |
| Geographic position | 49.3°S, 161.4°W |
| Height | 716 km |
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