The target is the Find the UFO badge. Its listing has no description, so use the visible game objective rather than a fixed coordinate or guaranteed trigger.
What to watch for
The UFO is a separate discovery objective. Search the current area for a distinct UFO object and check whether the Find the UFO badge appears. An ordinary Needle handoff is a different objective.
If the search stalls
Use the chapters guide to identify the chapter area, then compare the Secret Hunt guide if the object you found is a needle. Check the badges catalogue for the exact target name, or return to the wiki index for another task.
