| Primary satellite | Secondary satellite |
| Name | Vanguard 1 Rocket | COSMOS 2251 DEB |
| Spacetrack catalog number | 16 | 34057 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2023 Feb 05 21:54 | 2023 Feb 06 12:18 |
| Time of closest approach (UTC) | 2022 Nov 29 03:40:50.484 |
| Minimum distance | 6315.433 km |
| Height difference | -608.171 km |
| Relative speed | 13.196 km/s |
| Angle between velocity vectors | 121° |
| Geographic position | 6.2°S, 41.3°W |
| Height | 1324 km |
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