Tuesday, 4 April 2017
AR12645 in CaK Light - 4th April
I was really pleased to be able to leave work relatively early this afternoon and capitalise on the clear skies that had appeared as the day progressed. There was a lot of haze in the western sky, and the seeing was shot with a pretty gusty wind at times, but, never the less was nice to be able get a last look at the large groups of active region that have been geo-effective over the past week. On the limb, even in Calcium wavelengths, there was a surge prom visible from AR12644 that had been spitting with M class flares earlier in the week. This image was taken with the 80mm scope at ~2000mm focal length with the PGR Chameleon 3 camera using 2x2 binning to shorten the exposure and freeze the seeing; this technique worked very well in this instance, the image may not be perfect but was considerably better than the live view image when the capture was taking place.
Posted by Mark Townley at Tuesday, April 04, 2017