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Mirepoix France

June 2009

Flag	City	Country	School	Latitude (°) +N/-S	Longitude (°) +E/-W
	Mirepoix	France	Ecole publique	43.750	0.667

Date	Gnomon	Shadow	Angle
June 21	100 cm	40 cm	21°48’ = 21.801°

Mirepoix	France
Ecole	Primaire
Longitude	00°40’ E
Latitude	43°45’ N
Angle	+ 21°48’ = +21,80°

gnomon 1m
ombre 40cm
angle 21,80°=21°48’

Calculations with Caseros
difference of latitude 43°45’ - (-34°36’) = 78°21’ = 78.35°
distance between the parallels : 78.35° x 111.111 km = 8706 km
difference of the angle of the Sun : 21,8° - (-58,0°) = 79,8°
circumference of the Earth : 8706 x 360° / 79,8 = 39 275 km