| Primary satellite | Secondary satellite |
| Name | Vanguard 2 Rocket | COSMOS 1275 DEB |
| Spacetrack catalog number | 12 | 39943 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 13 10:03 | 2024 Dec 14 11:06 |
| Time of closest approach (UTC) | 2024 Nov 13 21:31:57.666 |
| Minimum distance | 60.961 km |
| Height difference | 1.534 km |
| Relative speed | 12.546 km/s |
| Angle between velocity vectors | 111° |
| Geographic position | 18.1°S, 61.8°E |
| Height | 935 km |
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