Sun in h-alpha and helium D3 (Spectroheliogram)
Taken by Richard Schrantz on April 19, 2026 @
Nicholasville, Kentucky, USA
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Details:
Here is the sun from this morning in h-alpha and helium D3 imaged with a 102mm f/7 spectroheliograph. The helium image is paired with an SDO image at 211 Angstroms to try and match up coronal holes. ASI183mm camera.
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