Sunspot AR2740 in Cak
Taken by Martin R Wise on May 7, 2019 @ Trenton, Florida, USA
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Date Taken: 2019:05:07 16:51:37
  
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Details:
Looking at the lower, cooler, chromosphere in Calcium K around AR2740 at 200mm F20.
Photographer's website:
http://https://www.astrobin.com/users/MalVeauX/
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