Case study · CASE-074 · Photographic evidence / MoD file
Calvine photograph
OpenOpenWhere Near Calvine, Perthshire, ScotlandWhen 1990-08-04
Case
- Overview
- Two walkers photographed a large diamond-shaped object with a nearby jet. The Ministry of Defence file went to The National Archives in 2009; the original photo was published in 2022.
- Investigative phases
- MoD investigation (DI55); National Archives release (DEFE 31/180/1); 2022 publication
- Reported phenomena
- Large diamond-shaped object and an aircraft
- Public evidence status
- Photograph and MoD file public
- Alternative explanations / caveats
- Classified aircraft; reflection or hoax proposed
- Next research tasks
- Compare negatives and MoD correspondence
- Last reviewed
- 2026-11-11
Assessment
- Event date
- 1990-08-04
- Source category
- MoD file; photograph
- Original data accessibility
- Yes
- Witness / instrument basis
- Photograph; two witnesses
- Corroboration limitations
- Witnesses anonymous
- Extraordinary claim assessment
- Unidentified; possibly classified aircraft
- Current status
- Open
- Priority research task
- Review MoD correspondence
- Lead source ID
- SRC-V86-40
- Last reviewed
- 2026-11-11
Evidence (1)
Documents gathered (1 line of evidence)
- MoD Calvine file at The National Archives (DEFE 31/180/1); photo published 2022 Primary record linked