| Primary satellite | Secondary satellite |
| Name | Vanguard 1 Rocket | Kosmos-1641 |
| Spacetrack catalog number | 16 | 15623 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2022 Jun 28 03:44 | 2022 Jun 27 21:45 |
| Time of closest approach (UTC) | 2022 Jun 02 07:56:48.508 |
| Minimum distance | 4.465 km |
| Height difference | 3.757 km |
| Relative speed | 10.582 km/s |
| Angle between velocity vectors | 93° |
| Geographic position | 27.9°S, 170.2°W |
| Height | 1482 km |
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