| Primary satellite | Secondary satellite |
| Name | Vanguard 1 | Cosmos 1660 |
| Spacetrack catalog number | 5 | 15821 |
| Radar cross section | small | large |
| Epoch of two-line elements (UTC) | 2024 Sep 08 19:51 | 2024 Sep 08 15:41 |
| Time of closest approach (UTC) | 2024 Feb 28 00:06:10.831 |
| Minimum distance | 8181.693 km |
| Height difference | -1385.270 km |
| Relative speed | 12.170 km/s |
| Angle between velocity vectors | 130° |
| Geographic position | 32.9°N, 60.8°W |
| Height | 2883 km |
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