Overview
On the night of December 7, 2025, residents of São Luís, Maranhão, reported a bright, rapidly moving light that crossed the sky for several minutes. Social‑media posts and local news outlets quickly labeled the phenomenon an “UFO,” sparking a wave of speculation about extraterrestrial activity. Within days, a joint investigation by amateur astronomer Luan Victor, aviation regulator ANAC, and the drone‑testing community identified the source as a DJI Mini 3 unmanned‑aerial vehicle (UAV) operated by engineer Lucas Buhatem as part of a nighttime autonomy trial. The investigation hinged on precise timestamp matches between Victor’s astrophotography footage and the drone’s flight logs, effectively closing the case.
Investigation and Evidence
Victor, who runs a modest observatory on the outskirts of São Luís, captured the luminous object on a 30‑second video at 02:14 a.m. while monitoring meteor activity. When he posted the clip online, viewers noted an unusual, steady‑glow object that did not follow typical meteor trajectories. Concurrently, Buhatem uploaded a short test video of his DJI Mini 3 performing a “night‑flight endurance” maneuver at 02:13:58 a.m., showing the same steady illumination produced by the drone’s ANAC‑approved navigation lanterns. Side‑by‑side frame analysis revealed identical light patterns, angular velocity, and altitude estimates (≈ 250 m).
Buhatem confirmed the timing in an email to the portal Vigília: “The flight was scheduled for 02:10 a.m. to test battery performance under low‑temperature conditions; the recorded video matches the exact moment the public saw the light.” Victor added, “Our timestamps are synchronized to UTC‑3 with sub‑second accuracy, leaving no room for discrepancy.” The convergence of independent data streams left little doubt that the “UFO” was a drone.
Technical Details
The DJI Mini 3 is a consumer‑grade quadcopter equipped with a 150‑gram airframe, making it exempt from many heavy‑UAV regulations, yet it must still comply with Brazil’s ANAC Ordinance 145/2022 regarding night operations. The ordinance mandates the use of high‑intensity, flashing navigation lights that are visible from at least three nautical miles. Photographs of the São Luís sighting display a steady white glow consistent with the Mini 3’s built‑in LED beacon, not the pulsing strobe required for larger aircraft. However, the drone’s “high‑visibility mode”—activated for test flights—produces a continuous illumination that can appear unusually bright when observed against a dark sky.
Regulatory and Community Context
Brazil has seen a surge in civilian drone activity, with over 1.2 million registered UAVs as of 2025. Night‑time testing, while permitted, is tightly monitored to prevent interference with aviation and to avoid public alarm. ANAC’s spokesperson, Mariana Silva, explained, “All night‑flight tests must be logged, and operators are required to share flight data with local authorities when unusual sightings are reported. In this case, the data supplied by Mr. Buhatem matched the public’s observations, allowing us to issue a swift clarification.”
The episode also underscores the importance of public education about drone technology. Local UFO groups, while enthusiastic, often lack technical expertise to differentiate between aerospace phenomena and emerging consumer‑grade UAVs. Collaborative efforts between astronomers, regulators, and hobbyists can mitigate misinformation, as demonstrated by the rapid resolution of the São Luís case.
Conclusion
The bright light that lit up São Luís on December 7 was not an extraterrestrial craft but a controlled, documented drone test. By cross‑referencing video timestamps, flight logs, and regulatory compliance records, investigators provided a clear, evidence‑based explanation that dispelled rumors and restored confidence in the sky’s ordinary occupants. As drone usage continues to expand, similar incidents are likely to arise, highlighting the need for transparent reporting mechanisms and continued dialogue between the scientific community, regulators, and the public.
