Guyhirn
UK19910815_D15 August 1991·Guyhirn, Cambridgeshire
Reported 15 August 1991 at Guyhirn, Cambridgeshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 15 August 1991 (day precision)
- place
- Guyhirn
Cambridgeshire
England - crop
- not recorded by any source
- size
- not recorded
- recorded by
- cc
- images
- 1 · 1 diagram
- writing
- nothing was written about this formation on any source
Also called
Nothing else. No other name or place string appears on any source record for this formation.
Where exactly
- coordinate
- 52.615512, 0.053756
- how it was got
- os open names
place, to within 2,000 m, from the cc record - on a map
- OpenStreetMap
No source publishes a coordinate for any formation in this archive. Every coordinate here is derived from the place name a source printed, and this page says how precise that makes it rather than rounding it away.
Images
1 image(s) on this formation's own source records. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.
Diagrams (1)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | diagram | cropcirclecenter.com / Bertold Zugelder | site default | 575×415 34.8 KiB image/jpeg |
image 8b50a5b79b48 | https://www.cropcirclecenter.com/date/1991/199108.html |
Date
15 August 1991, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 15 August 1991
- additions
- 1991-08-14 (cropcirclecenter “addition” entries)
- weekday
- Thursday, day 227 of the year, ISO week 33, summer
- sun and moon
- 39.0 days before the September equinox; moon waxing crescent (33% lit), 9.9 days before the full moon (computed at 12:00 UTC; a reported date is a discovery date, not a creation date)
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 52.615512, 0.053756 — place, ±2,000 m, by os_open_names, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Cambridgeshire | England | 52.615512, 0.053756 place / os_open_names |
Crop and size
crop and size not recorded by any source
Source records
What each source published, side by side. A row whose values differ across the sources is marked: the archive prints the disagreement rather than choosing a winner.
| field | cc cropcirclecenter.com |
|---|---|
| id / slug | UK19910815_D |
| name | Guyhirn |
| location | |
| county | Cambridgeshire |
| country | England |
| date reported | 1991-08-15 |
| date precision | day |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1991/199108.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/ca2db0581b9af… raw record view: /formation/cc/ca2db0581b9afd6a5fe9d2f0303dc25d4c8c970309eb61f41c5c0b6b8754ce63 in the preview app |
Texts
no text documents in the archive for this formation
Claims about this formation
no claim was extracted from a text about this formation
Geometry
1 diagram file(s) on this page. measured from the diagram itself, and experimental: the extractor's rotational order is right on 88.8 % of a 200-diagram hand-labelled set against a gate of 90 %, so read a number here beside the picture rather than instead of it.
| diagram | rotational symmetry | elements | rings | mirror | fill |
|---|---|---|---|---|---|
| cc 8b50a5b7 | ≈ none found | 2 | 1 | 0.981 | 0.1504 |
Experimental, and marked ≈ wherever it appears. These numbers are read off a drawing, not off the field: the extractor's rotational order agrees with a hand-labelled set on 88.8 per cent of 200 diagrams against a gate of 90 per cent, its element count is within one on 97.5 per cent, and its ring count is not calibrated at all. Nothing in the analysis tree is derived from the rotational order while that gate is unmet.
Diagrams that look like these: cc 8b50a5b7— the nearest by perceptual hash. The whole archive is browsable by shape in the shape section, and this formation's own diagrams go straight into that grid: show them in the grid.
Neighbours
In time
- previous
- Ravensden 14 August 1991, Ravensden
- next
- Cheesefoot Head 16 August 1991, Cheesefoot Head
- previous in UK
- Ravensden 14 August 1991
- next in UK
- Cheesefoot Head 16 August 1991
- same day
- Clench Common (Clench Common) · Devil's Dyke (Devil's Dyke)
- within 7 days and 25 km
- Guyhirn 14 August 1991, 0 m away, 1 day(s) apart
In place
The nearest formations the archive can place.
Provenance
- entity built at
- 2026-09-11T19:20:39Z (derived from the link decisions, not from this build)
- index run ids
- none
- reviews applied
- none
- open queue pairs
- none
- entity record
- index/formations/UK19910815_D.json · row in index/manifest.jsonl
- input digests
- entity 98bbe74e7fd5 · images 689711fbde1e · texts 4f53cda18c2b · geo b80d1cd0d372