Sun CaK
Taken by Stefano Sello on March 28, 2015 @
Pisa,Italy
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: 2015:03:28 14:23:05
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Details:
Due to a very clear sky and good seeing, many chromospheric features are visible today on the solar disk through a CaK filter: it is possible to clearly see umbra and penumbra details of sunspot AR2305; chromospheric internetwork and network located at supergranulation cells; plages; faculae and pores. No filaments are clearly visible, but a small prominence is visible at the north-western limb.
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. 12:15 UT.
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