Dear Gianni,
Mea culpa! You are of course right. The
summer solstice arc indeed curves upwards
on a cylindrical surface.
I was assuming that the surface was made of
flat segments (as in the external photograph)
but this is not so.
- The higher line (at ¾ of the height of the
doors)
Dear Frank, Gianni, Robert, Bill and all,
It seems that there is much interest in directly solving the multibody Kepler's
law for at least
those objects in our solar system. This is working from near basic principles
rather than
developing perturbations to curve fitting polynomial circular
Molto bella ! Very Fine !
From Google Earth we have Lat.=39d 38’
Long. =104° 56’ 25” E - the place is almost exactly on the 105d
meridian with TZ=7h East
(englewood, colorado,4000 quincy ave.)
In
my opinion :
- the arc that touches the bottom of the noon analemma is
certainly a part of
