| Primary satellite | Secondary satellite |
| Name | USA 308 | LEMUR-2-NICHOL |
| Spacetrack catalog number | 45876 | 46503 |
| Radar cross section | | small |
| Epoch of two-line elements (UTC) | 2021 Feb 28 19:42 | 2021 Mar 01 19:40 |
| Time of closest approach (UTC) | 2021 Jan 18 01:38:57.024 |
| Minimum distance | 218.934 km |
| Height difference | 1.652 km |
| Relative speed | 12.953 km/s |
| Angle between velocity vectors | 118° |
| Geographic position | 52.2°N, 166.5°E |
| Height | 578 km |
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