Sun in h-alpha/calcium-H (Spectroheliogram)
Taken by Richard Schrantz on August 6, 2025 @
Nicholasville, Kentucky, USA
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Details:
Here is the sun from this morning in good seeing recorded using my 102mm f/7 spectroheliograph. h-alpha and calcium-H shown. Stopped to 72mm for calcium-H. I also added a comparison of calcium-H and h-epsilon prominences. h-epsilon is only 1.6 Angstroms to the red side of calcium-H. ASI183mm camera.
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