Sun in h-alpha/calcium-K (Spectroheliogram)
Taken by Richard Schrantz on August 16, 2025 @
Nicholasville, Kentucky, USA
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Camera Used: Unavailable Unavailable
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Details:
Here is the sun from 8/16 taken with a 102mm f/7 spectroheliograph in excellent seeing. h-alpha and calcium-K. The calcium image was stopped down to 72mm. ASI183mm camera.
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