Sun In H-alpha/calcium-K (Spectroheliogram)

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Sun in h-alpha/calcium-K (Spectroheliogram)
Taken by Richard Schrantz on July 7, 2026 @ Nicholasville, Kentucky, USA

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Here are a couple full-disk solar images in h-alpha and calcium-K recorded with a 102mm f/7 spectroheliograph. Calcium-K stopped down to 72mm. ASI183mm camera.

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