Barranha (PORTUGAL)
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Time---------------Shadow length
10,00h--------------91,5cm
10,50h--------------75,2cm
11,00h--------------66,3cm
11,58h--------------59,1cm
12,00h--------------57,1cm
12,50h--------------55,7cm
13,00h--------------56,5cm
13,50h--------------59,5cm
14,00h--------------64,7cm
14,50h--------------72,6cm
15,00h--------------87,3cm
15,50h--------------108,6cm
16,00h--------------145,6cm
| date | lieu | lat. (°’) | lat. (dec) | gnomon | ombre | angle (°’) | angle (dec) |
| 14 dec | Lafranç. | +44°08’ | +44,13° | 100 cm | 239 cm | +67°17’ | +67,28° |
| 14 dec | Barranha | +41°19′ | +41,32° | 27,3 cm | 55,7 cm | +63°54’ | +63,90° |
Lafrançaise-Barranha
| Différence entre les angles | 67,28-63,90 = 3,38° |
| Distance entre les villes | 313 km |
| Circonférence de la Terre | 313x360/3,38 = 33337km |
by
Eric Vayssié
—
last modified
2008-01-09 21:12
