| Primary satellite | Secondary satellite |
| Name | THORAD AGENA D DEB | Kosmos-1577 |
| Spacetrack catalog number | 42521 | 15077 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Dec 20 12:55 | 2024 Dec 23 05:31 |
| Time of closest approach (UTC) | 2024 Dec 29 06:14:50.438 |
| Minimum distance | 4.382 km |
| Height difference | 1.744 km |
| Relative speed | 14.129 km/s |
| Angle between velocity vectors | 146° |
| Geographic position | 79.8°N, 93.7°E |
| Height | 968 km |
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