| Primary satellite | Secondary satellite |
| Name | Transit 2A | Altair 2 |
| Spacetrack catalog number | 45 | 871 |
| Radar cross section | medium | medium |
| Epoch of two-line elements (UTC) | 2021 Feb 27 18:25 | 2021 Feb 28 04:30 |
| Time of closest approach (UTC) | 2021 Jan 30 05:13:02.654 |
| Minimum distance | 7.439 km |
| Height difference | -4.504 km |
| Relative speed | 8.075 km/s |
| Angle between velocity vectors | 66° |
| Geographic position | 66.8°S, 157.3°W |
| Height | 882 km |
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