Subtended angle...

[Externet]

Hi all.

Now i got confused; this site:

http://www.mathopenref.com/subtend.html

shows the subtended angle for the sun being 32 arc minutes or 0.52 degree.

 

That seems very small.

 

Does it mean that in a 12.0 hour day, the sun path could be drawn as 346 sun disks fitting edge to edge on the sky ?

 

Am trying to create a formula, chart or nomograph to calculate the needed diameter of a distant mirror reflecting the entire sun disk. (As a heliostat of what diameter positioned at a given distance will show the complete sun disk)

 

Miguel