bxl-forever
Already on the map elsewhere on the Space Pole site:
https://www.openstreetmap.org/way/30250825

The picture of their building on their website suggests the current building used in OSM is correct.
https://aeronomie.be/sites/default/files/inline-images/bira-iasb-building.jpg

Could you please confirm you have surveyed this area and are sure the institute should be relocated to the building pointed by your note.