| Primary satellite | Secondary satellite |
| Name | SL-16 R/B | deb Agena D |
| Spacetrack catalog number | 28353 | 5149 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Apr 14 05:40 | 2021 Apr 14 13:04 |
| Time of closest approach (UTC) | 2021 Mar 03 15:11:29.766 |
| Minimum distance | 12.492 km |
| Height difference | 0.263 km |
| Relative speed | 14.496 km/s |
| Angle between velocity vectors | 155° |
| Geographic position | 63.8°S, 42.2°E |
| Height | 864 km |
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