Sun CaK
Taken by Stefano Sello on December 21, 2014 @
Pisa, Italy
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
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Details:
Winter Solstice Sun: Big sunspots AR 2241 and AR 2242 dominate the solar activity today.
Photo details: Solarmax70 CaK solar telescope centered at 393.4 nm (K1R of the line profile for quiet chromosphere), equipped with a Lu130M CCD camera. 13:00 UT.
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