| Primary satellite | Secondary satellite |
| Name | Kosmos-1321 | YUBILEINY |
| Spacetrack catalog number | 12976 | 32953 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2024 Dec 23 10:17 | 2024 Dec 23 14:27 |
| Time of closest approach (UTC) | 2024 Dec 26 19:19:12.433 |
| Minimum distance | 4.217 km |
| Height difference | 3.114 km |
| Relative speed | 5.320 km/s |
| Angle between velocity vectors | 44° |
| Geographic position | 73.0°S, 81.3°W |
| Height | 1525 km |
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