Sibson Airfield
UK19990729_H29 July 1999·Sibson Airfield, Cambridgeshire·wheat
Reported 29 July 1999 in wheat at Sibson Airfield, Cambridgeshire. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 29 July 1999 (day precision)
- place
- Sibson Airfield
Cambridgeshire
England - crop
- wheat
- 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
- 52.568263, -0.388258
- 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 46.0 KiB image/jpeg |
image a7f26d9c7418 | https://www.cropcirclecenter.com/date/1999/199907.html |
Date
29 July 1999, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 29 July 1999
- weekday
- Thursday, day 210 of the year, ISO week 30, summer
- sun and moon
- 37.7 days after the June solstice; moon waning gibbous (99% lit), 1.0 days after 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
- 52.568263, -0.388258 — 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 | 52.568263, -0.388258 place / os_open_names |
Crop and size
- crop
- wheat (cc: wheat)
- diameter
- not recorded by any source
- size as written
- not recorded
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 | UK19990729_H |
| name | Sibson Airfield |
| location | |
| county | Cambridgeshire |
| country | England |
| date reported | 1999-07-29 |
| date precision | day |
| crop | wheat |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1999/199907.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/16d8925e68ab7… raw record view: /formation/cc/16d8925e68ab751c05215306203a0e66e6bfb3f98ccc5b09d43e89ce8e2f0022 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 a7f26d9c | ≈ none found | 1 | 2 | 0.952 | 0.3288 |
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 a7f26d9c— 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
- Avebury 28 July 1999, Avebury
- next
- Karronda 30 July 1999, Karronda
- previous in UK
- Avebury 28 July 1999
- next in UK
- Patching 30 July 1999
- same day
- Nykøbing (Nykøbing) · Avebury (Avebury) · Avebury Stone Avenue (Avebury Stone Avenue) · Avebury Stone Avenue (Avebury Stone Avenue) · Great Staughton (Great Staughton) · Hail Weston (Hail Weston) · Moreton Paddox (Moreton Paddox) · Oakley (Oakley) · Stanton Prior (Stanton Prior) · Stantonbury Hill (Stantonbury Hill) · Waden Hill (Waden Hill)
- within 7 days and 25 km
- none, or this formation has no coordinate at place confidence or better
In place
The nearest formations the archive can place.
Sibson23 July 1990Sibson
0 m away, 1990-07-23
Sibson23 July 1990Sibson
0 m away, 1990-07-23
Sibson23 July 1990Sibson
0 m away, 1990-07-23
Sibson23 July 1991Sibson
0 m away, 1991-07-23 Sibson20 July 1992
Sibson
0 m away, 1992-07-20
Sibson26 July 1995Sibson
0 m away, 1995-07-26
- same county and year
- Dewesbury 8 June 1999 · Sutton Coldfield 9 June 1999 · Sutton Coldfield 27 June 1999 · Great Everson 23 July 1999 · Great Staughton 23 July 1999 · Great Staughton 29 July 1999 · Hail Weston 29 July 1999
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/UK19990729_H.json · row in index/manifest.jsonl
- input digests
- entity e3ee3fb68379 · images 43e8d7cb7845 · texts 4f53cda18c2b · geo 65d52680660a