| Primary satellite | Secondary satellite |
| Name | DELTA 1 DEB | Cosmos 1818 |
| Spacetrack catalog number | 37651 | 17369 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2025 Nov 12 00:36 | 2025 Nov 13 12:05 |
| Time of closest approach (UTC) | 2025 Oct 18 07:34:25.625 |
| Minimum distance | 7.317 km |
| Height difference | -5.426 km |
| Relative speed | 14.758 km/s |
| Angle between velocity vectors | 163° |
| Geographic position | 17.3°N, 72.8°E |
| Height | 794 km |
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