A chromospheric solar image with the active region AR12860, made at Bucharest Solar Observatory on 01.01.2021. This region has the greatest activity at the beginning of the 25th solar cycle, with an M4.7 class and several C1-C9 class eruptions. Instrumentation used: Zeiss refractor 110mm F/15, Halpha Baader Solar Spectrum 0.3A, 0.4X reducer, camera ASI290MM mono. Processed in AutoStakkert 3 and gimp. In this image different features of the solar activity in the chromosphere region can be seen: sun dark spots, plages (bright regions of very hot plasma), flares, filaments of cold plasma, fibriles, prominences, and spicules at the limb. Author: scientific researcher Octavian Blagoi. Annotated colorized image in full resolution available here.
Published on: Sep 03, 2021