Sun in calcium-K (Spectroheliogram)
Taken by Richard Schrantz on September 19, 2025 @
Nicholasville, Kentucky, USA
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Camera Used: Unavailable Unavailable
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Details:
Here is the sun from this morning in calcium-K taken with a 102mm f/7 spectroheliograph stopped down to 72mm. ASI183mm camera. good seeing showing lots of fibrils and some granulation.
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