Sun in h-alpha/calcium-H (Spectroheliogram)
Taken by Richard Schrantz on June 25, 2025 @
Nicholasville, Kentucky, USA
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Details:
Here are h-alpha and calcium-H solar images from this morning recorded with a 102mm f/7 spectroheliograph. For calcium, stopped down to 72mm. ASI183mm camera. Very good seeing.
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