Eratosthenes 2010-2011

Valladolid, Spain

Tuesday 22 March 2011 by perbosc

March 2010

Valladolid Spain CEIP Narciso Alonso Cortes 41°39’N 04°42’W
x/+ Date Gnomon Shadow Angle
x march 17th 100 cm 95 cm 43°31’ = 43.531°
x march 18th 100 cm 90.5 cm 42°08’ = 42.145°
x march 21st 100 cm 88.5 cm 41°30’ = 41.509°
+ march 20th 100 cm 89.4 cm 41°48’ = 41.8°

x : measure
+ : estimation

A big dispersion of the results, but the calculated angle for march 20th is quite good : 41.8°

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