the arminghall henge in space and time willem beex and john peterson
TRANSCRIPT
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The Arminghall Henge in space and time
Willem Beex and John Peterson
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NORWICH
Location
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The first view of the Henge
Photographed by Wing Commander Insall, V.C on 18th June 1928
Published: Antiquity 3.2 (1929)
N
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HENGE
CHAPEL HILL
Neolithic and Bronze Age environment
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Landscape and midwinter sunset
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Landscape and midwinter sunset
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Chapel Hill
18 Dec 2002 15:35
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Calculation of sun’s path at mid winter sunset
The apparent altitude of the sun’s centre, h, and its azimuth are approximately related (for h < 4 deg.) by a straight line:
Where is the azimuth of the sun’s centre, is the observer’s latitude, is the obliquity of the ecliptic andr is the increase in apparent altitude due
to refraction.
h = –Cos Cos + Sin
+ rSin
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Sources of information and verification
The formula for ‘h’ is derived from a paper by G. R. andP. F. Freeman (on Stonehenge) presented to the 33rd annual meeting of the Canadian Archaeological Association and published in 2001.
Results of calculations were checked against those published in John North’s “Stonehenge” (1996).
By trial and error it was established that a value for the refraction of 0.0081 radians gave the best fit of spreadsheet values to those published by North.
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MWSS Simulation (spreadsheet)
Now
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MWSS Simulation (spreadsheet)
5000 years BP
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Source: http://www.carrowkeel.com/sites/croaghpatrick/reek2.html
Crough Patrick Rolling Sun
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Crough Patrick Rolling Sun
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Crough Patrick Rolling Sun
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Crough Patrick Rolling Sun
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Crough Patrick Rolling Sun
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Excavation Plan (1936)
Location
Orientation
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Rectified aerial photograph
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Rectified AP, closeup
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Orientations compared
Axis of Henge
MW sunset (last flash) - 5000 BP
SOUTHWEST
MW sunset - now
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Contour lines by theOrdnance Survey
21000 21500 22000 22500 23000 23500 24000 24500 25000 25500
2500
3000
3500
4000
4500
5000
5500
6000
6500
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DTM created in Surfer
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DTM transferred to CAD
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Building the henge
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Adding textures and shades
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Inserting sun and trajectory
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Creating the animation
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Conclusions• Position of the Henge is northeast of the most
prominent hill in the area
• A midwinter sunset roll down would have been visible in 4,000 BP
• This is the first accurate determination of the Henge orientation
• Orientation is not accurately towards MWSS
• VR allows us to explore alternative hypotheses
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THE END