| Primary satellite | Secondary satellite |
| Name | Hubble Space Telescope | OBJECT BG |
| Spacetrack catalog number | 20580 | 47467 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 16 08:38 | 2021 Apr 16 10:05 |
| Time of closest approach (UTC) | 2021 Mar 07 12:14:26.434 |
| Minimum distance | 63.057 km |
| Height difference | 0.345 km |
| Relative speed | 12.138 km/s |
| Angle between velocity vectors | 106° |
| Geographic position | 27.6°N, 136.9°E |
| Height | 535 km |
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