Sun in h-alpha/calcium-H (Spectroheliogram)
Taken by Richard Schrantz on April 10, 2025 @
Nicholasville, Kentucky, USA
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Details:
Here are 2 spectroheliograms of the sun from this morning (h-alpha and calcium-H). The seeing was not bad for the h-alpha image and OK for the calcium image. 102mm f/7 homemade spectroheliograph, ASI183mm camera.
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