| Primary satellite | Secondary satellite |
| Name | Vanguard 2 | LEMUR-2-DAYWZAGOODDAY |
| Spacetrack catalog number | 11 | 46501 |
| Radar cross section | medium | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 06:14 | 2021 Jan 16 13:59 |
| Time of closest approach (UTC) | 2020 Nov 28 18:26:46.216 |
| Minimum distance | 76.064 km |
| Height difference | 1.573 km |
| Relative speed | 12.576 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 32.2°N, 82.5°W |
| Height | 554 km |
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