| Primary satellite | Secondary satellite |
| Name | DELTA 1 DEB | COSMOS 1818 COOLANT |
| Spacetrack catalog number | 37651 | 50777 |
| Radar cross section | small | small |
| Epoch of two-line elements (UTC) | 2025 Nov 12 00:36 | 2025 Nov 10 13:11 |
| Time of closest approach (UTC) | 2025 Oct 17 22:57:44.115 |
| Minimum distance | 29.782 km |
| Height difference | -1.761 km |
| Relative speed | 11.078 km/s |
| Angle between velocity vectors | 96° |
| Geographic position | 64.3°N, 141.6°W |
| Height | 782 km |
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