| Primary satellite | Secondary satellite |
| Name | Vanguard 2 | deb Delta 139 |
| Spacetrack catalog number | 11 | 12257 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2024 Dec 14 09:44 | 2024 Dec 14 01:24 |
| Time of closest approach (UTC) | 2024 Nov 12 09:22:23.691 |
| Minimum distance | 65.520 km |
| Height difference | 4.394 km |
| Relative speed | 12.827 km/s |
| Angle between velocity vectors | 116° |
| Geographic position | 29.3°S, 127.5°W |
| Height | 928 km |
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