Sunspot group AR 2403 – August 23, 2015
A new sunspot group on the Sun these days, and a new imaging session for me. After so many days of clouds and rain (it felt like months), I’ve finally got another chance at imaging the Sun. The seeing did not cooperate too much, but for a few brief seconds a clear window allowed for some fantastic views of the new group.
My equipment was the homemade 200mm F/5 Newtonian working at F/20, with a full aperture Astrosolar filter and the ASI 120MM-S camera with a Baader green filter. The seeing conditions were mostly 2-3/10, with the mentioned brief good seeing of 7/10. Only 700 frames were stacked for the images below.
The color version shows the Earth’s diameter also, just as a remainder of how small our planet really is in the Solar System.
One of the above images was posted by Deborah Byrd on the EarthSky.org website. Thank you Deborah!