INTERNATIONAL YEAR of ASTRONOMY Eratosthenes

Lafrançaise France

Monday 22 June 2009 by perbosc

- date : 22 06 2009
- solar noon : 13h57 UTC
- gnomon : 100cm
- shadow : 37,7cm
- angle : 20°40’ = 20,667°

Lafrançaise France
Collège Antonin Perbosc
Longitude 1°15’ E
Latitude 44°08’ N
Angle + 20°40’ = +20,67°

Calculations with Caseros
- difference of latitude 44°08’ - (-34°36’) = 78°44’ = 78.7333°
- distance between the parallels : 78.7333° x 111.111 km = 8748 km
- difference of the angle of the Sun : 20,67° - (-58,0°) = 78,67°
- circumference of the Earth : 8748 x 360° / 78,67 = 40 032 km


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