the arminghall henge in space and time
DESCRIPTION
The Arminghall Henge in space and time. Willem Beex and John Peterson. Location. The first view of the Henge. Photographed by Wing Commander Insall, V.C on 18th June 1928. Published: Antiquity 3.2 (1929). N. Neolithic and Bronze Age environment. Landscape and midwinter sunset. - PowerPoint PPT PresentationTRANSCRIPT
The Arminghall Henge in space and time
Willem Beex and John Peterson
NORWICH
Location
The first view of the Henge
Photographed by Wing Commander Insall, V.C on 18th June 1928
Published: Antiquity 3.2 (1929)
N
HENGE
CHAPEL HILL
Neolithic and Bronze Age environment
Landscape and midwinter sunset
Landscape and midwinter sunset
Chapel Hill
18 Dec 2002 15:35
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
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.
MWSS Simulation (spreadsheet)
Now
MWSS Simulation (spreadsheet)
5000 years BP
Source: http://www.carrowkeel.com/sites/croaghpatrick/reek2.html
Crough Patrick Rolling Sun
Crough Patrick Rolling Sun
Crough Patrick Rolling Sun
Crough Patrick Rolling Sun
Crough Patrick Rolling Sun
Excavation Plan (1936)
Location
Orientation
Rectified aerial photograph
Rectified AP, closeup
Orientations compared
Axis of Henge
MW sunset (last flash) - 5000 BP
SOUTHWEST
MW sunset - now
Contour lines by theOrdnance Survey
21000 21500 22000 22500 23000 23500 24000 24500 25000 25500
2500
3000
3500
4000
4500
5000
5500
6000
6500
DTM created in Surfer
DTM transferred to CAD
Building the henge
Adding textures and shades
Inserting sun and trajectory
Creating the animation
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
THE END