Case file · Sighting
Ligao, Albay photograph
A photograph of an unidentified object taken at Ligao in Albay province, Philippines, on 29 June 1966 ended up in the US Air Force's Project Blue Book files, with six negatives and no conclusion.
1966 CE · 13.22, 123.52 · status: disputed
The sceptical view
The Philippine cases in Blue Book are few and poorly documented; a single photograph cannot be verified decades later.
The researched reading
A poorly documented photograph in the Blue Book files. It cannot be checked today, so ordinary explanations keep most of the weight by default.
| Explanation | Weight | Why |
|---|---|---|
| Something known, misidentified | 38% | Most single-photograph cases in Project Blue Book turned out to be aircraft, birds, lens flares or film defects; with only the file record (six negatives, one print) and no witness analysis, these remain the base-rate expectation. |
| A hoax or fabrication | 22% | Photographs submitted to authorities in the 1960s were often staged with models or thrown objects, and nothing in the file rules this out. |
| Genuinely anomalous | 13% | Blue Book reached no conclusion and the image has not been independently analysed; what remains is an unknown, not evidence of the unknown. |
| A known natural phenomenon | 12% | Clouds such as lenticulars near Mayon Volcano, or reflections and ice crystals, are often photographed as objects. |
| Perception, memory or mind | 6% | If the photographer saw something brief, its size and motion would be guesswork. |
| Secret human technology | 5% | US military flights from Clark Air Base and elsewhere in the Philippines were frequent in 1966. |
| A poorly understood natural phenomenon | 4% | An unusual atmospheric light near a volcano is possible but unsupported. |
Official position: Filed by Project Blue Book without a conclusion; a later press report says the Philippine weather service ruled out aircraft and balloons, but no document confirms this.