AR4048 central on Sun disc (Apr5)
Taken by Giorgio Rizzarelli on April 5, 2025 @ Trieste, Italy
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AR4048 (16.4 Earth diameters long), captured two days ago when it was fully central on the disc, in a minute of good seeing (up to 4/5), transparency 3/5. 25% of 1000 frames. Astrosolar ND5 + CPC800 at direct focus + Neptune-M.
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