The Sun Moves South
Taken by Jim Haklar on August 19, 2015 @ Wells, Maine, USA
Click photo for larger image
  Camera Used: Canon Canon EOS REBEL T3i
Exposure Time: 1/320
Aperture: f/inf
ISO: 200
Date Taken: 2015:08:21 13:43:59
  
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Details:
While on vacation in Maine I tried to capture the green flash at sunrise. Although I wasn't successful, I did manage to record the Sun's southerly motion. This image is a composite 4 days apart (note the difference in atmospheric conditions). It was taken using a tripod-mounted Stellarvue SV70 ED and a Canon T3i.
Photographer's website:
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Why is the Sun so quickly moved South?
Posted by EDAN2154 2015-08-22 09:33:59
From Jim Haklar: Let me show you through an example. If you look at the U.S. Naval Observatorys website for August 16th and August 19th for, lets say, a Sun altitude of 5 degrees, the respective solar azimuths for those dates are 75.6 and 76.9 degrees. The difference in azimuth is 1.3 degrees or about 2.5 solar diameters which is close to what you see in the image. I believe the reason the movement looks so dramatic is that the images were shot using a focal length of 420 mm. It wouldnt look so dramatic if it were shot with a normal focal length lens.
Posted by jhaklar 2015-08-22 18:30:23
Jhaklar, yes, is true. Thank you
Posted by EDAN2154 2015-08-23 06:37:02
the width of the sun: 4,4 cm
The distance between the centers: 11 cm
4,4 сm - 0,5 degress
11 cm - х degress
x = 11*0,5/4,4 = 1,25 degress
Posted by EDAN2154 2015-08-23 08:00:47
 
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