| Primary satellite | Secondary satellite |
| Name | Intercosmos 25 | LEMUR 2 GREENBERG |
| Spacetrack catalog number | 21819 | 42837 |
| Radar cross section | large | small |
| Epoch of two-line elements (UTC) | 2021 Jan 16 10:31 | 2021 Jan 16 09:01 |
| Time of closest approach (UTC) | 2020 Nov 27 20:48:46.468 |
| Minimum distance | 7.875 km |
| Height difference | -2.723 km |
| Relative speed | 15.572 km/s |
| Angle between velocity vectors | 176° |
| Geographic position | 42.0°S, 2.3°E |
| Height | 614 km |
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