It is a temporary debris field created by an active event.
While the event is active, debris fields can appear at PvE points on the map for a limited time.
They use the Recycling mission described in Recycling Mission, but display a badge and a timer in the galaxy.
Their location is not announced: you must find them by navigating the galaxy. Beacons indicate their presence; select a field to view its details in the side panel.
Once you have selected the field, you can send your recyclers directly from Fleets > Recycling without reopening the galaxy.

