Incident: 29 July 2025, approximately 10:10–10:15 local. Sources reviewed 13 November 2026. Historical case addition; publication date is not the incident date.
A persistent object above the town
Two people reported a silver, irregular-looking object over Andacollo on 29 July 2025. The witness described watching it for about 25 minutes. Three recordings subsequently obtained by SEFAA had capture times around 10:12–10:15 local. The report was filed on 12 August and resolved on 2 September 2025.
The check that produced an identification
Investigators reviewed the recordings, viewing direction and nearby air traffic. They contacted Andacollo’s municipal communications office, which identified a captive meteorological balloon associated with a mining operation. The office also supplied photographs and video showing the object from another angle. SEFAA concluded that the reported appearance was a tethered balloon.
Why this explanation is stronger than a resemblance
A suggestion that an object looks like a balloon is one level of evidence. A source connected to the locality identifying the equipment and providing comparison material is a more specific chain. It connects an observed appearance to a documented object rather than merely placing it in a broad visual category.
The report’s comparison images are therefore significant. Viewing the same object from another angle can help test whether an unfamiliar outline is caused by orientation, reflections or its construction. A single silhouetted view may hide details that become clear elsewhere.
What the original estimates do not establish
The witness supplied impressions of height and size. Those estimates do not override an identification supported by additional material. A physical size inferred from an assumed distance remains dependent on that assumption; it is not an independent measurement of an enormous aerial vehicle.
Nor does persistence by itself imply unusual propulsion. Once a tethered object has been identified, its apparent station-keeping needs to be interpreted within that supported explanation. The purpose of an archive is to preserve how the question was answered, including cases whose initial strangeness has an ordinary source.
Assessment
This case is Closed (Explained). It is retained as a documented 2025 sighting with its explanation visible, rather than removed or described as unresolved. UKPX reviewed the official report and its conclusion, not the original camera files in a separate forensic analysis. The illustration is conceptual and is not a photograph of the actual balloon or its exact deployment.
Map reference: Rounded Andacollo town reference from OpenStreetMap/Photon. Not the camera position, balloon tether or a visitor-access point.
Sources and review trail
DGAC / SEFAA, case 2146. Six-page official report: original account, recording metadata, municipal identification and conclusion; read 13 November 2026.
SEFAA September 2025 release index. Published 1 October 2025; observation occurred in July, not the report/release month.