The Sun, March 11, 2014

The Sun Mar 11 2014 by Ron Brecher

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March 12, 2014

I shot this photo on March 11 around 1 pm EDT.  The Sun continues to be very active, and you can see that the sunspot groups and other features have rotated and evolved since my image of March 3.  Enjoy!

Solar View 50, 50mm f/8 refractor with integrated Ha filter with <0.7 nm bandpass, mounted on an EQ-6 mount, roughly polar aligned and set to track at solar rate. Celestron NexImage 5 camera (2.2 micron pixels; 5 MPix).  Shot from my SkyShed in Guelph.  Supplied software was used to capture videos at about 6 frames per sec; 12x1m of the disk (each exposure 1/227th sec).  The best 36 frames from each video were stacked, and the 12 disk images were combined in Registax to make a master frame.  This was processed in PixInsight as follows: Background neutralization to balance colour, deconvolution, HDR Wavelets (6 and 4 pixel scales), TGVNoise, stretch to adjust black point, local histogram equalization, contrast and saturation.