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Lafrançaise (FRANCE)

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We had a sunny day for the equinox measurements.
2008-03-14-c.jpg
We used two gnomons of 100cm and 50 cm high.
equinoxe-lafr-lamap.jpg
With the gnomon of 50cm we realized an animation of the shadow of the gnomon
equi-gif.gif


With the 100cm gnomon we made a precise measurement of the length of the shadow at solar noon : 97cm

angle of the sun : 44.128°

Latitude of Lafrançaise : 44°08’=44.133°

We have chosen a virtual partner located on the equator

Distance to equator 44.1333° x 111.111 km = 4904 km

Circumference : 4904 * 360 / 44.128 = 40007km


webcam 14th march 2008
webcam february 2008
webcam 20 mars 2008

 

by Eric Vayssié last modified 2008-05-15 13:55
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